406 vs 421 sbc for boost Pistons were a SRP due to the Procharger, cam was 226 @ . IMO a BBC fits just about as well as a SBC in these cars. Listing ID 182689746. 875 stroke, 421sbc nitrous motor 12-1 compression, 5. 2" 3. 7”) 406 SBC with the rods clearanced to allow the use of a flat-tappet cam. It's a weekend TOY that will also spend time at the dragstrip. 10 12 bolt. 14 1 Dart SHP LS Next 427 Turbo or NA Short Block . 10:1 cr with 75 cc, AFR 195 and 7 flat top) -auto. 570/. I'm comparing price of retrofit roller cam vs roller block and cam; and if I go with the roller block 383 just how much do you think is the loss from 406 cubes? How much more would it produce compared to the Impersonator II - beside I would not lower the comp since I will drive on 91 (US) octane, and even possibly 95 (US octane). This is the 421 I built, Pump gas HYD roller he wanted a torque monster 3. 400s are the best bang for the buck when it comes to SBCs. Happy building! build engine "X" amount plus "X" amount for boost build 421 cube N/A engine about the same hp about the same price We run a Naturally aspirated 421 SBC in my daughter's 69 Firebird . Building and testing a 406 ci small block chevy vs a 402ci ls2 chevy small block - Chevy High Performance Magazine improving on our numbers with over 580 hp and 530 lb-ft, all the while Have 400 and 350 rods. and factory a/c Hard to be absolutely sure, since it depends on the rest of the combo; but, all else being equal, and a bit over a 5% increase in displacement, about 5% each torque & HP Installed the Blown SBC 406 with 8-71 and enderle mechanical injection in the 48 Ford Coupe! Time to start the FuelTech wiring and rest of the fun! Not much About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ATK High Performance Engines dyno testing my new motor. 580 @ the valve, on a 112. Hello Gents Right now I'm studing and searching for cam lobes for my 421" strip some street project . Our short blocks are in high demand among racers of all types worldwide. 73 gears, 750 DP, single-plane intake (Edelbrock, I don't know which one at this time). I added the Billet Splayed Main caps to mine. 5 posts · Joined 2016 Add to quote; Only show this user #1 · Oct 25, 2024. Designed as a mild street application to fit under stock hoods on hot rods, and comes as a complete kit for one convenient price. manifold. Shop the Best SBC 400 Street Kits and Forged rotating assembly kits for turbo, nitrous, or street. But if your on a budget, then it definately is. 000 base circle cam using a Callies rotator using the compstar rods. Wonder who has built one and if they'd do it again. I have a few friends running 434" with lots of boost. but looking for opinions on what else can I do to increase power with my current equipment. 50 duration 540/558 valve lift 105 lobe This member here made 755hp with a 409 inch SBC on alcohol but he used a 1050 Dominator. I recently purchased AFR heads, 195 street port. 7 con. BBC - Build it once and forget about it. 63 a/r exhaust turbines would be best for a 350 street engine (quick to boost). 155 bore x 3. 406, less windage, get a good pan, mine has 227 AFR race ready, 10:xx compression, Bullet 255/259 @ . The 235's on my 450 are very responsive. A 421 needs a stroker crank which costs money. We have a 406 sbc Motown block, Lunati I beam rods, Cola crank, its a solid roller engine at the moment, Iron Dart 220 Heads that flow just shy of 300. Will my SRP pistons work with the 60 40 valve spacing ? Currently running standard spacing RHS heads. The cu in difference would be worth about 22 lb ft of torque, all else considered. 800 or 3. Stage I. Air Gap. . Customer Service 605-692-1697. Engine is built for boost and racing. 00: $6,995. SBC 421 or 427. 3 liter t-bird may also work. L. Would like to run pump gas. All the 421's I have built I have used a solid roller and have gone to the . Even before the boost, the 400 pumped out 575 horsepower and 489 lb-ft of torque, but after adding boost from the 8-71, these numbers jumped to 819 horsepower and 667 lb-ft of torque at 11. 875 stroke/6" Rod = 421:thumbup: an easier route is the 415 cid 3. Jump to Latest This also enlarges your displacement which is the easiest way to increase torque. 9 shots per min on 420 vs 2. 1 shots per min on 406 If you shoot nonstop all game from 0 second match start to the full 20 minutes, you shoot 38 times with 420 and 42 times with 406. We are installing new flat top pistons because we cracked a dome piston not to mention it would be 12. SBC 406 carb and intake change advice. After two sleeve jobs ( one on each side) I put the crank Ive just finished a blown 427( thats really a 434) with 8:71 and duel 850 mighty deamons on pump gas it dynoed over 740 last pull . 8 posts · Joined 2011 Add to quote; Only show this user #1 · Apr 25, 2011. 003" too much cam lift, not enough to make any sort of difference on a dirt track but he was illegal and forever be remembered for that. 377. I have read just as many problems with SBC headers and BBC headers. It might actually improve mileage enough to measure because the greater amount of torque would net using less throttle to get moving and to cruise on once moving. 280zx turbo or 300zx turbo first gen will have this turbine. That will determine what you need. 07 @ 131 - 6. 406 Vic Jr vs. 400 SBC, 9:1, AFR 195s, TH400, Coan converter, 3. The numbers on the dials are uncorrected. reason for the ****ty rods is they were cheap got it all for under 1000, I wanted the 227 or the 235 because this motor will only be use a season maybe 2 then set on the shelf for a backup and replaced with a 434 and I would like to have either of the heads SBC 415 421 Rotating Assembly; CNC-Motorsports offers the best selection of Small Block Chevy 415-421 rotating assembly kits. 35 tq per cube, pretty typical result for those kind of parts. 75 I'm currently on the drawing board building a 421 SBC It will be used for strictly 1/4 mile (bracket) drag racing, 3100 lbs car, t-400, 6000 stall. 406 SBC on E85 - 10. yes that cam spec is at . The strokes are typically made with two valves per cylinder, which makes it possible to increase the displacement of the engine without Boosting a SBC for towing Throw a 454 in it and be done. The block will be the 880 roller block . Heads are edelbrock e tec 200 64cc I am partial to the 421 builds myself . Re: Anyone do a 406 to 421 SBC comparison? Results? Worth the change? by RevTheory Great block, great intake, great heads (CC) and the compression should give you a great tuning window. After the jetting and I ran factory 062 mild ported Vortec's with a smallish hyd cam last year and it was a 10 sec. 05/1. We offer quality name brands such as; Eagle, Scat, Callies, Compstar, Crower, Lunati, JE/SRP, Diamond 192 SMALL BLOCK CHEVROLET- 2V STREET 16RIB (#3110) Our TBS 192 Low-Profile series is designed specifically for small block Chevrolet engines. 2800 to 3200 stall!! 1970 chevelle silent sleeper sbc powered jap trap eater (Copy what Bill Jenkins did in his engine books. Equipped with our forged 4340 center-counterweighted crank (when available), forged H-Beam rods with ARP 2000 or L19 bolt upgrade and I like Holley # 9381-830 cfm or #9380-850 cfm on my 406's. Street Edge 10" 2800, 8. SHARKBITEATTACK Discussion starter. Your cam selection is way off, you need to look at a solid roller with over 250 degrees @ . It lasted about 10 or 12 runs on the dyno, then the STOCK crank broke. 155? bore by 4? stroke). Build a 406. 8-14. The 406 there was under 9K. The compression increase of a small chamber head would with the cam you have would build up the bottom end torque a lot and leave the engine with a good top end. My goals with these specific cam choice is to have a wide power band ( about 4000-7000) with maximum area under the torque curve. He used one of those goofy tall tapered adapters to make it fit the 4150 Vic Jr. Same question for the big block 468 vs. Give that 406 a lot of SR cam, a lot of gear, and a lot of converter. That's gonna follow the difference in cubes pretty directly. 5 ratio roller rockers. 875 Crank, matched Brodix Intake, Manton Push Rods, Howard’s Lifters, Custom Comp Cam, Comp Belt Assuming both the 377 and 406 have same bore there is no benefit in breathing or v. Increase your Brake Mean Effective Pressure, Reduce Friction losses, Raise your RPM. For Trade : a 1970 SBC 406 4bm, (Complete - Freshly rebuilt; New Forged Crank) for a BBC 454. 75" crankshaft 350 or 400 mains Ohio Crank 6" H-beam rods w/ARP 2000 bolts SRP flat-top pistons Total Seal moly rings Race bearings Internally balanced SRP I am aware of the 383 vs 406 Arguments . HOWEVER, let me introduce the combos I am considering: 383 cid - (350 Block) 4. 421 to 406 is gonna lose about 20lbs roughly using the same parts. Surprisingly it makes just under 500hp. 00). Moderator: Team. 125" BoreCrankshaft: Smeding 4340 Forged Steel, Internal/External Balance, 3. 050, . I do not want to overbore more than . Troy Patterson Guru Posts: 3416 Joined: Mon Sep 04, 2006 4:18 am Location: Re: Carb selection 406 SBC. 155 Bore x 3. 625 15:1 CR Combo !! so you need to be careful comparing any 383 vs 406 or 406 vs 434 or if youve got a 400 block you currently tend to build a 406 vs a 377 , the 377 used to be the better choice simply because in the past the only source for heads was ported O. 421 SBC. louis165 Discussion starter. It also recomends a MSD retard boost timing box which I really dont want for 5-6 psi . com that made mid high 600's with hydraulic rollers. from Jake 200-4r w/ 3. rod -3. I am freshening up a set of heads for a customer's weekend warrior AMC Spirit. The compression ratio is 12:1 with the 70cc heads. The store will not work correctly when cookies are disabled. C4 Tech/Performance - AFR 245 SBC head flows 350cfm - I just got back from the SEMA show. 13 Degree Brodix Heads worked by Eric Weingartener, Titanium Intake Valves, Inconel Exhaust Valves, T&D Billet Steel Shaft Rocker System, Dart Little M Block (. View More. Sponsored by: going with a 1. Built this low compression (8. 00 assembled $6,595. I have seen dyno tests between a 1200. They are already a 15 degree motor that can produce big tourqe. Very pleased with Straubs cams. 75" in fact the first 383s were simply 350s with a 400 crank installed in the block after a . 8 in the can at 10 " vacuum. Frankly the blown SBC is my cup mainly because I can't afford the blown BBC. Cost difference/offset would be at most $300. It does not have to have any 'street' manners, and won't have AC, power brakes, etc. 050 on the intake side and 260 on the exhaust side, . 5! This is true of ALL octane boosters) To run Best way to get 500 hp and 500 tq from 406 sbc. 496. will cost you is getting a good piston for the longer stroke and longer rod instead of an off the shelf part for a 415/421 stroker. Building a 700 hp 421 SBC requires patience and attention to detail, but the performance reward is well worth the effort. Be careful of the lure of large displacement small blocks. so it really flows "about" 830cfm; and a vs carb. The flat-top, four relief cut pistons are 0. ) SHP or Little M will get you 421" pretty easy. 50 ProCharger D1SC, Super Sniper EFI conversion 2019 1. 406 with 11. I am mainly concerned about the 350 Block vs 400 Block strength and overheating issues . 5 rocker does, and the heads flow well Spent Friday on the dyno testing 421 pump gas build for a customer, He was looking for a 600 horse pump gas build and we achieved our goals with this build. 600? were the test engines valve train tops My motor was suited for boost, so I wanted to build a fuel system that could support E85 to run boost without having to build a different motor. e85. 00 unassembled 383 vs 406. 875" stroke crank Ohio Crank H6000 rods w/ARP 2000 bolts JE pistons Race rings and bearings Internally balanced - Billet caps add $700. 00 tuner holley and a 529. 659 ext) (dur @seat 316int 320ext) (LS112) AFR245 unported heads with LGM C3 Tech/Performance - Double Pumper Carb Selection for 406 SBC - With my 406 SBC progressing well, I am trying to decide which Holley style double pumper carb to buy. 875 Stroke. JE pistons, Fully ported dragon slayer heads, wiseco boost line connecting rods, dart little M block, callies compstar 415 vs 421. (in my opinion. [inpost_gallery post_id=2305 group=”1″] The Test Heads. It will make massive torque from idle to 3500 and pull the trailer better than a boosted 350. 155 bore good street kit, the 421 is good to 6500 the 415 about 5500-6000 imo, a 5. than i have,but i'd go for the 750vs. PM was sent. TCI TH350. Why not the tried and true 406 in SBC or better yet a 408 in a LS. These Custom Designed Kits Consist Of Carefully Matched Components For Your Particular Application. They obviously have never driven a SBC 406 or a blown 540 BBC, or a NA 632 big block. He's running 3. Also have a scatt ultra lite 3. After the supercharger locked out at 20 works surprisingly well. Plan to try t Engine is a 421 SBC built with a Dart SHP block. Spent the morning on the dyno with Frank Carey. and free HP. On the bigger engines like the 421 the Air Gap has to small of a CSA to support air flow at Higher RPM's . has established its Joliet, IL $16,595 Posted 4 days ago. Here are three key benefits that make it stand out from other options: Improved High RPM Power: The CL12-212-2 Magnum Cam and Lifter Kit offers excellent high RPM power, making it ideal for those seeking a cam that can deliver 406 SBC Dyno Tested Long Blocks. 040 over)with Billet Steel Caps, Boost Line Rods, Callies Ultra Magnum 3. 92@119. intake, 1 3/4 headers with a max of 6500-7000 RPM and was going with a solid lifter cam. Can go. A new GM block that needs way more work to use it is $1150. My 422 is based on a factory 509 casting and is fitted with Oliver caps 1-4 and a deburred/smoothed rear cap, short filled, deck plugs, steam hole plugs, etc. Let One Of Our Experienced Sales Staff Help You With Your Rotating Assembly Needs! Complete Assembly Internally Balanced. 7 psi. Heads are Dart pro 1. Joe Padavano. Made 790 on e85 with a 1050 Dom. The motor is 13-1 compression. Custom Balanced race kits at CNC-Motorsports. 750 Stroke 8. General engine tech -- Drag Racing to Circle Track. Jump to Latest heads and domed pistons you will be somewhere in the 13. Hmm food for thoughts. 406 12:1 home ported Dart 215 Iron Eagle (non-platinum heads) 421sbc pump gas with ported Brodix Dragon Slayers ported super Vic 2 intake. The car is 3500 lbs bracket car only, TH 350 with 3500 stall, and 4. , Funny you should bring this right now. There was a few street pump gas motors posted around here or chevelles. 81 last week 406 sbc 509 block pro one heads 2. AFR 195s were used with a Victor Jr again for the procharger, Holley 770 avenger with a 4 hole spacer, 1 3/4 headers. 95@116 on pump gas. 5 CR AFR 210 heads 255/263 solid roller cam Weiand 177 supercharger (2. 425 HP for a 383 is quite easy to do though. 5:1 1/4 mile Bracket motor, between the 220 and the 227 AFR eliminators, which would be better. Good luck which ever way you go. What platform are you looking for? 400-406-414-421, Budget or quality parts? I use a lot of Callies rotators with good results plus there rods are for stroker builds and no difference in price whether its a 400 or 421 It really depends what your looking for and your budget. (1150 CFM) with the standard boosters. If so what advantage would the larger engine be in a light weight dragster? Tom. th400. 420 lobe I can get away with a 1. 030 bore and the 400 crank having the main journals cut down to the 350 bearing size, a 396 is just a slightly longer 3. 7" Rods General Q & A - 406 / 421 sbc builds - Anyone care to share their build experiences with a 400 small block chevy? I have several blocks available, thinking of building a GM block 406 or possibly a 421. ( No electronics and on foot brake ) Great lil motor, make right at 700 hp. 10 gear 421 Small Block Chevy Short Block Price; Motown block Ohio Crankshaft 4340 3. Only dynoed the 421 with the 220 runner AFR's Engine Mods - 377 vs 434 SBC?? - I had pretty much narrowed down my engine combination to a 434 small block (4. These heads are probably really intended for 421 ci and bigger, But would work well on some really wild smaller cube motors. 10 gears. 30 ft*lbs on a 421 SBC ? Do you have a dyno, or dyno tested those heads? That head size and area would seem kind of small on a 427 BBC to me. from Jake 200-4r w/ 3 Using a factory 400 production block as the basis, Henderson didn't alter Chevrolet's basic layout, but instead put together the familiar 406 combination arrived at by retaining the factory 3. We use the best name brands such as Dart, Callies, Lunati, CP-Carillo, Eagle, Scat, JE, Diamond, Mahle and Manley just to name a few. Tried to A 383 has a 400 crank as you know. you might want re consider hydrolic roller cam, its only safe up to 6000 rpm iwent solid 7200 plus raiting, to many things can happen. 11. 0:1 compression ratio depending on the combustion chamber and head gasket choices, so adding a lot of boost begs for race gas, taking the fun out of street thrashing. I tell people if your going to build a 400 or 406 bump up to the 421 for a street build its the way to go. 516 233/243, Hedmans, 200-4R, 10" 3,200, 4. 600 lift, cut on 108 L/S. ride N/A. Locotrician Discussion starter. I agree that boost is a great equalizer but CNC-Motorsports offers the best selection in SBC 302-350-358-377-383-400-415-434-441 short blocks. 1 comp, This engine was an N/A piece previously. Just get the rest of the good parts, my combination was from Mike Lewis . The money you'd spend on 6" rods would not improve your lap times as much as a new set of tires would. Similar short block, but I used a Profiler 210 head with 64cc. " 421 SB2. 230cc. 050, 106 sep, 102 c/l). e. Made 641HP @6000RPM and 611ftlbs @4400RPM using the 3. I would consider selling the 400 block and all your used parts and buying a good used 421 engine or a complete new engine if you can find one. 93 super unleaded only becomes 93. and 5:14 gear with 14x32 slicks. 406, 415, 421 or a 434 Stroker; C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette. Here are 2 406 combos I have run in the las couple of years. 421 CI Small Block Chevy built for nitrous Dart Block Oringed with copper head gaskets Callies Halton Hills, Ontario, CA $13,500 Posted 6 weeks ago. cv67 Guru Posts: 1836 Joined: Sat Sep 06, 2008 3:39 am 421 SBC CR, Dynamic CR & Cam timing. 200/1. Perfer pump 93. 25:1 Comp solid roller 260/267 . Hyd. Just doing the math, compression is worth about 2% per point. 6 rocker arm will boost the lift by 1. 875 crank could build 421. i have one on my 406 and notta problem yet. All make over 600hp on pump gas. 64cc chamber. 7 or 6" rod 406 is all you need with a stock block, if your going to build for cubes, buy the dart block and build a 454 cid SBC now thats a stroker! 2wld4u Lets say a sbc, . I'll let you decide if it's worth it. Bill Simpkins 74 Nova I got a 421 sbc 13. Chad does some very good work, and is very capable of helping you reach your goal. 1st, 406 11:1 home ported stock valve size 062 Vortec heads Ported Super Victor, 1000 M/D Hyd flat tappet cam 1 5/8" headers Results, best of 10. Be sure to check out the I Have a new 55 chev now,, And i Just built a new 406 for it also,, Full interior car, all motor no NOS and drive it ever day it went 11. The engine was capable of producing 360 hp at 4500 rpm and 365 ft-lbs of torque at 3000 rpm. 5 to 1 comp, 220cc heads, and a 250-ish duration hyd roller made 640. The aluminum heads I see these days on the market that flow over 200 406 sbc, 10. Old combo was a 406 with a old comp 292 hydraulic, 11:1 comp, RPM airgap with 750 Holley DP carb. I would go for the 406 anyday. $16,595 Joliet, IL 14 1 View More. Jump to Latest Good reading here, been looking into this also as I have built some 406 and 408s that did real well. personally Id build the 383 as the least expensive route to getting max power Tech / General Engine - SBC 421 dyno results - Finally got my sbc 421 together and put it on the dyno Here are the specs: 4. I'm sure abit more head, more rpm with more cam can get near 700. Just wondering if it would have better low speed part throttle with the annular boosters ? Or no difference with 406 cubes ? Top. 7 rod 4. Sure is nice to be able to turn the key and have 500+ hp available that you can hardly hear run. 73's 406 SBC M21 3. 5mph and in the high 10's the rest of the night. The 500 hp SBC will be a little hard to live with unless you are hard core hotrodder. That is why I always build a bigger and bigger big block Chevy. Post by Ed-vancedEngines » Sat Aug 11, 2007 11:51 pm. The solids are in a 434, 421, and 406. 5 to 1 compression ratio-- race gas only because octane boosters are a big scam(if it says it raises octane 5 points it only raises an actual 5/10ths of a point, i. The 421 seems very popular now and the 220 AFR's would be the way to go. 750" stroke 406 will provide more low end torque but at the expense of increased piston speed and friction at high rpm while the 3. If you have to buy a new crank you might as well stroke the 400 block out to 415 or 421 is safe. I want to know which of these two, 406 or 421 stroker engines would be best for this car and why? The car will be a I have several blocks available, thinking of building a GM block 406 or possibly a 421. 875 inch stroke, (415-421 cid). Plus cam to rod clearance is Nuts with a 4. About 7 or 8 years ago, I made 784 with a stock block, and it kept cracking cylinder walls. You'll save a pile of money (vs. The BBC is taller and longer than a SBC, but the 1. Save Share 408 cu in SBC Aqua. 5 rocker does, and the heads flow well to . A few days ago I run a similar 406 on the dyno==Afr 210 heads, 236 72 Nova- resurrecting it 2025 - converting to all old school sbc/TKX 99 Transam-LS 370 88mm turbo 71 Chevelle 496 bbc. 07 comp, ported Trick Flow 195 heads, RPM Air gap, Holley 3310, Straub HR . 592, 264/274 @. 050" and 260 degrees @ . The engine posted makes 1. And flattop 377 / 406 pistons. 00 ATI SB Chevy 7-inch balancer and Pioneer Hd 168-tooth add$450. 050" for the exhaust on a 106-108 lsa. 421 VS. As per Lingenfelters SBC book "why build a 383 when you can build a 406" (,030 over I am building a 421 sbc with a short block from Ohio crank. And I am sure I would still have killer throttle response and drivability with the 245 406 sbc questions. 5400 conv. 15123 posts · Joined 2013 Add to quote; Only show this user What's the BEST SBC to build for bracket racing in 2019? Let's discuss what's going to be in the car at the drag races this year, plus some other updates fro 406 vs 434. The Hammer has between 10. roller cam with 255 at . IMO the only reason to ever build a sbc using a 4 inch bore block is if you already have a 4 inch bore block. To me, if you can make the same power with a 6,000 rpm 406 and a 7,000 rpm 355, then the 355 is more likely to break bottom end parts due to rpm. QUESTION,if I swapped out these heads now,I would be sacrificing compression for flow. On a street/strip car what's the diference in a 106 lsa and a 112? so the exchange of shares in the stock market adds no capital to business, no increase in the production and no purchasing power to the market. Do have some shitty 882s dont want to use. The only downside to a reduced base circle cam is that you may need longer pushrods to compensate. Which 1050 would be best to use on a 421 SBC. Leave the mains alone unless it's evident you are lean right off. 030 overbore like the 383) should yield a nearly proportionate power increase but I don't think it would be that noticible a difference unless measured on a dyno or at the strip. No vacuum or check The LS engines might offer modern tech efficiencies but the classic SBC has its charm and a huge aftermarket support. I have Wisecos in my blown 406, they work fine. heres the run down of the motor. About Us; Promotions 406 SBC 13:1 on gasoline RPM range 5200-7400 Dart 215 2. Torque was very impressive @ 574 FT LBS. Ok I have already a lil m dart block I'm no mechanic so I'm reaching out to you guys to get all the specs needed as this has been a hard topic to find information on, there is limited stuff on YouTube or google on building a 421 sbc. CR maybe 8,5:1 SUM-K1101 idle to 4500rpm 0,050 dur in 194 ex 204 lift 0,398 and 0,421 cam timing 0,050. 63” upper pulley and 6” lower) should be ~8 PSI Fuel Holley Sniper X Flow, supports 1350 HP The 23 extra cubes of the 406 (a 400 block with a . 0 Feb 9, 2020 | 12:09 PM Share Thanks for your reply. You will both make about the same BMEP and friction losses. We run the Brodix 18X heads a custom grind Comp roller cam, Lunati crank and rods . your running a better combo. I built a 422 sbc using a stock block. I have also thought of doing a 400 block with 350 crank for a 377. The AFR head especially the CNC once are a tad expensive too, and 421 might need bigger runners. 350-434 SBC $ 2,350. We offer street kits with pump gas pistons to wild fully forged rotating assembly kits to meet your racing needs. 875 Crank, matched Brodix Intake, Manton Push Rods, Howard’s Lifters, Custom Comp Cam, Comp Belt SBC 406 11. 0" stroke. The 396 SBC stroker is rather in-depth to build, it requires more carefully checked clearance and clearance grinding on the block, definitely needs a stroker clearance connecting rod, is best built on the later roller block due to block clearancing concerns, and should have a special small journal rod journal crank and connecting rod just to 406 SBC M21 3. 2 . due to bore difference so your question can be narrowed down to choice of stroke. Save Share Your right if you search about problems BG vs Pro-systems but com'on, bg probably sells 100 carbs for every 1 that prosystems sells. I could have made the same or more HP around 600 with an LS, and it would've purred like a kitten and gotten better than 7-10 mpg. As far as a crank is concerned , I like an internal balanced crank set up for 6 inch rods. 131 posts · Joined 2011 Add to quote The 400-inch stroker was plenty healthy in NA trim, thanks to solid-roller, CNC-ported Dart Pro 1 heads and single-plane, Dart intake. I originally intended them for my fairly stock 406 short block and I'd stay 406 if you could and buy a smaller top pulley. Don’t forget to ask questions and get community support when in doubt. Then on the other hand the 23 degree heads seem to be a limiting a pair of 0. 5:1 comp, sportman II ported heads, victor jr. 31 12 bolt that's why i run boost and small cams now, i want it all, top and bottom end torq Put together a 421 recently with cam specs almost identical with ported RHS 235 heads and had similar results. I wouldn't go down to I have 4,244 lb 1976 chevy caprice with a stock sbc 400 in it. 5-1 CR Dart Little "M" Block w/Splayed Nodular Caps Manley 4340 Non-Twist Forged Crank Standard Crank Snout You should be able to get a good LQ4 or LQ9 for somewhere between $1800-2500. 05 cam, Victor Jr, with a Mark Whitener aka jmarkaudio (Lightning Racing Carbs) carb, and made 646hp@ 6800 you have a good block. This is their power adder ready 400. 20-30's @ 128-130 The 950HP is still a decent carb so I won't hold my breath on that 50# torque increase . You Decide The Boost - You Decide The Power!! Supercharged / Turbo. 0,dart heads, again to match the cubes I won’t build another big inch SBC myself, I dropped $15k on my current 421”,i bought every individual part, right down to the bolts. The engine I am planning to build is a 406-421 sbc with approx. Super close race! ZR1 vs C1 Corvette . The original discussion was on normally aspirated 383 vs 406, not about boost. I'll know approximately 15 minutes after it's running if it makes more On a max effort 406 13. I have a lead on a 350 4 bolt and a 406 2 bolt. 383 or 406 sbc. Increase the size of the high speeds (assuming you keep making gains) until you no longer gain, then put a little more jet I am thinking of building a sbc 408 for a street car and would like opinions on the 408 stroker . it’s bad ***, but, it’s right at the edge of daily streetable. I built a 421 about 10 years ago, dart little M, scat rotating assembly, je pistons, dart 215 pro 1 heads, 620 lift hydraulic roller, victor jr, and an 830 holley. S. Or stock crank, rod, cast flat top piston 406. . Annular boosters just tune better. We know the longer 3. If you were comparing a 396 vs a 406 I think I'd lean a little more toward the 406 but even then the 396 has the advantage of bigger heads with more airflow capacity. )if thats your plan,street and strip. 9 inch,lots of Duct tape. Jump to Latest 55K views 15 replies 8 participants last post by marks412 Apr 27, 2011. 060" overbore, 11:1 comp, afr 195's, vic jr int and an 850 holley. 750" Stroke - 5. Zero deck, 9 to 1, small cam (210-220 at . this makes the stock efi to deliver more fuel on boost. I'm needing around 750 horsepower to be competitive at my race track (super latemodel) circle track. 434 sbc 421 sbc. Utilizing a big bore engine block and a medium stroke forged crankshaft, this engine loves to rev! Using only top of the line components like a fully forged rotating assembly, hydraulic roller camshaft and aluminum heads, the 406" 383/406 Small Block Chevy Super Kit Price; Ohio Crankshaft 4340 3. 400 inches of valve lift have taken place (see Fig 1). Out and about I primarily use Samsung Galaxy Buds Pro TWS which only do SBC/AAC unless you have a Samsung phone, and I do this because they are tuned better than almost anything else. 406 Cubic Inches 4. The second one is a 421 brodix race rite cnced heads, eagle crank rods, billet caps, team g intake ( done by wilson) csu blow through carb, vortech t trim, roller cam 4 7 swap, I havee yet to dyno CNC-Motorsports Chevy 415-421 short blocks have quickly raised the bar to a new level in offering high quality performance short blocks at an affordable price. 699 int, . I was educated on compression being best way to make power/tork. BTW, hydroboost is awesome on boosted engines. BUILT FOR BOOST! BOROWSKI RACE ENGINES, INC. Will be a good long term investment, good for several rebuilds. 441 ci C4 ZR1 vs 406 SBC C1. Regardless of port volume all these heads flow about the same cfm until some 0. M. 800" StrokeRods: Smeding 5140 Forged Steel I-Beam with 3/8" Bolts, Absolute Killer 421 SBC Built For Boost. 875" stroke. Solid roller cam. 832 stroke 5. $13,500 The SBC 406 was made from a thin-walled, cast-iron cylinder with a single overhead camshaft and big valves. My 22 foot bow rider is not really a performance hull so the nine mph top speed increase that I gained over the stock 350mpi is probably I’ve had Chris Straub from Straub technologies do 4 cams for me. 5 to 1 compression. Different Compression Ratios Available. In stock deck height SBC we never go longer than 3. filled to he bottom of the freeze plugs. The engine compartments are huge. Jump to Latest 258 views 1 reply 2 participants last post by gnx7 Oct 25, 2024. 406, 421 or 434 Sportsman Series Drag Race Short Block: $6995: Drag Race Engines Econo Series - SBC: 427/640HP Econo Series Drag Race Engine: SBC: 406 Roots Style Supercharged Engine - Stage I, II or III: From: $24450: a stock 400 and a 350 stroked to 383 have exactly the same stroke at 3. Top. 5, however I bought the cam And convertor etc with the intention of running the higher compression, cam is crower 00356 solid flat tappet 260/266 @ . 20 years ago, we did a basic 406 with a 249/259 106 LSA solid flat tappet than ran 7. How the earphones are tuned matters a lot more than the codec. the 383( both motors built the same) I have heard that the 406 is a torque monster? True or false?The 383?? Thanks! Remember that the trans is a th350 and the gears are a 4:10. Would build similar to a couple 383 If your builder doesn't mind the extra work that high ratio rockers sometimes create, going with a 1. 600 valves 1-4 Barrell ProSystems Carb Peak HP= 756. 10 pulley with around 7psi boost. 31 12 bolt "I would rather have questions I can't answer than have answers I It's that time to pull the engine. With the Eagle Stroker Kit witrh the Stroker rods you can run a standard base circle cam also. Nice that a smaller head can do almost the same. I have my 421 tore down at the moment and have done a few things to it to help. 1Gary. 125/1. I dont think that would break the bank too bad. Mike . So far with a . 383 SBC. Ive had many people over the years rave about the results they get building a 400-406 SBC, and many of the same people would not consider building a 396-402 BBC , thats damn near always a bad decision in my opinion as the 396-402 BBC, if properly built with the correct matching components ,has a stronger factory or aftermarket block, a stronger rotating Sorry we didn't come up with a catchy name, but these assemblies are all business. 0 May 5, 2009 | 09:32 PM Share But depending on head choice, you may never see any difference in power what so ever with more cubic inch. 030", if at all possible . 050), stock intake or performer, exhaust manifold if you don't want to run headers and peanut port or large oval port heads. 904 lifters because of the smaller base circle cams. 066 times what a 1. Going by what Tony Mamo told me going from the 220 to 235 I would probably loose 30 FT LBS or torque but probably make around 660 horse. 630 104 LC 4000# with driver TH-400 w/ 3800 stall Super Victor and 235 Pro Toplines with the high speeds. 377 vs 406 vs 434. Ed-vancedEngines. intake open 10 atdc closes 24 abdc exhuaust open 39 bbdc closes 15 btdc SUM-K1102 1500 to 4800 rpm 0,050 dur in 204 ex 214 lift 0,421 and 0,444 Absolute Killer 421 SBC Built For Boost. Listing ID 184656553. Hypothetically speaking if you have a 496bbc built for boost, a good roller cam, a set of dart heads (in proportion to the cubic inch)9. the ford turbo from a 2. The intent here is to run four pairs of the Dart Platinum Pro 1 heads having intake port volumes of 180, 200, 215, and 230 cc. My curve has been 12 intial 20 more at 3000 rpm for 32 . I obviously can't hold your builder's hand on this The manual explains that timing should be reduced 2 degrees for every one lbs of boost. heads 3923441 76cc with 1,94 and 1,6 valv. I want the hp to be around 425 hp as a starting point for both engines. Motor: 406 SBC Forged pistons 10. Downleg boosters are good, but if you want the ultimate in the street driver I would get something with annular boosters Reply. Car weighs 2710 with driver. The only difference here seems to be really the hydraulic roller setup. 462/. Boost Ready - 370ci LS Long Block, Cathedral or Rect. Not looking to go "cheap" but at the same time would like to get the bang for the buck . 469 lift and 218/224 degrees duration at 0. its a 3310-3,has a secondary metering block w/ jets,choke has been milled,and also has a 850 base plate. 547/. 50 and is a comps cam, and I know both the 227 and the 235 take shaft mount rockers. Used parts are bring a premium. Just add your own I’m building a long rod (5. I also have Sony WF-1000XM4 which support LDAC, but the Buds Pro sound much better. the hydrolic is no maintence perfect for street, solid , valves have to be re-checked periodicly, cant First night the track was open here in Spokane Washington at the SCR strip! With a fresh list of upgrades the first pass running all motor was rather impress I have read a lot of 406-421 engines that have a solid roller to make 640-680hp. 00 Sbc 406 build. This is their part number BP4003CT1. I am having ring seal problems with the stock block, but it may be caused by not Torque plate honing it when I have it bored. 05 215's 64cc ported and polished,, milled JE Block: Smeding Heavy Duty 4 Bolt Mains, 9. If you're building a motor to a power/rpm level that will require splayed caps on a factory block, just step up to an aftermarket block now. Select Hi Tin block 4 bolt main machined 030-040-060 - 750. same bowl porting. Jump to Latest twenty years ago I made 757 HP with a stock block 406-Tunnelram with two dominators. 6 shaft rockers i got for cheap, so i need to use on of these 2 heads. 06@111 in a 3250 pound car. etc. 025” down in the cylinders at TDC. transmission 2500 tci stall. Choices I'm lookin at this time- keep the 406 and rebuild it, this time all forged and put in a retrofit roller cam or go with a roller block stroked 383. 040 over and a 3. I’m using Comp Cam’s XE262H with . T-flow The COMP Cams CL12-212-2 Magnum Cam and Lifter Kit is an exceptional choice for a cam seeking reliable performance for a 406 SBC engine. 410-415ci would be my choice unless you go Tall Deck. :thumbup: -VS a SBC 434 14:1 CR Dart Pro 1 215CC Heads 2. Even at 0. -5. Jump to Latest Wouldn't the big bore and thin cylinder walls on the 472ci sbc give you head gasket issues at high boost? How would it rpm with the long stroke? Also the biggest flowing SBC heads cost a packet more than equivalent flowing BBC heads. 5-11. Even if I put a very mild cam in that 406 engine with an LCA of 112° or higher the engine would still scream with those heads. casting, based cylinder heads, being available that could not effectively flow enough air to feed a 406 spinning up at 6500rpm, but in the last 20 years aftermarket If your 3310 is an early one with downleg boosters, use it. And the Dart block is undoubtedly better in all 406 is the baddest little sbc out there, i run a 383 stroker, the 406 would run the balls off the 383 richie rebel, Feb 10, 2012. Brodix track 1 heads. 6) 406 for a procharger, thought I would share the results. 750 Stroke and a 5. 3 solid rollers and the last one was a hydraulic roller. Hey guys. 1 @ 6300 its pretty bad when a little Dart 215CC 1-4 Barrell 434 14:1 can beat a 401SBC 2-4's SheetMetal Manifold 18deg 2. 1. 77 Monte 421 Profilers ported by Eric Weingartner, Straub HR 3200 conv. It explains why everyone thinks a 383 is God's gift to Camaros. Do it right, and get the handling down. 5 compresion but only ended up with 10. If you don't have a 350 block now there is no advantage to the 383 over the 406. Then spray away. Save Share Solid rollers aren't as limited on upper RPMs and make more HP / torque generally than a comparable spec Hyraulic roller due to the more aggressive ramp making more area under the curve. 0 @ 7500 Peak TQ= 585. Save Share -406 sbc (approx. SBC 406, has run a best of 6. 36 Eaton Posi, Moser Axles, , E-Tec 170s then AFR CNC 195s Blue Printed by Straub Tech, Custom Mike Jones HR Cam, RPM Air-Gap, Street Avenger 770, Pertronix HEI, Hedman 1 5/8" Headers, PMT 1320R Kit. Reply Like 12-03 Welcome to the site. As you can see, you only have one option, which is raising RPM. Port. We just bolted on a BLP 1230 Alky Dominator on my 23° Brodix Track One 233 421 s/b Chevrolet on top of a SV2 intake we put a 4500 top on. I do think though the trouble and cost is well worth the added drive ability, reliability, power and increase in fuel economy. It begins to get very pricey after you go beyond a 3. 030" Bore X 3. Reply. Spend the money on a good flowing set of heads. That is . I have been getting ready to order parts, but the two most competent engine machinists I have found have both (independently) recommended that I would be better off with a 377 406 sbc guys? Jump to Latest 406 X2 what Al said. 75 stroke the only alternative is to go to a smaller base circle to increase the difference between the two. There are guys running around on 6-8 lbs of boost on very mild almost stock small blocks. The hydraulic roller is in a zz3 350 with 195 AFR heads. Now, if you can afford all the best in bottom end parts, then this may not seem big. CALLIES CCW CRANK and RODS, DIAMOND PISTONS Give me some input as i would like to know how much more torque that the 406 will have vs. 36 @ 107 All motor ~ 3200 lb. Thread starter Obituary; Start date Feb 21, 2019; if possible but willing to put octane boost if needed. 406. D1SC~10psi. Final Thoughts. then use a 8:1 fmu to increase fuel pressure while on boost (ebay, 100. 30 60', 5. So ? Is destroke. Used to be able to get a lower mileage on for around $1200-1500, but now people think these are gold too. The engine is a 406, with a Lunati 40139 cam (. 2nd. CNC dart short blocks have become a huge hit among racers and performance enthusiast all over the world. 050” lift, along with 1. 00 mighty demon and the demon beat it by 5hp and better bsfc both were tuned to perfection. Brian M 1980 Camaro,1966 BelAir,2004 Dodge Ram HEMI on 42" tires,72 Chevy Short Wide project 1000-hp sbc 400 vs 1000-hp 496 bbc-procharged chevy test? what happens when we run the same f1a-94 supercharger, with the same pulleys on a modified 400-inch C3 Tech/Performance - 406, 415, 421 or a 434 Stroker - What do you guys think? I have a 511 4-bolt block being cleaned/mag'd & pressure checked. There are only three ways to make Horse Power. 550 lift. Upfront alpha of the 420s outweigh the potential small increase in DPM, especially as you are not shooting 24/7 on cooldown but most often take some potshots. 850 rod offer a much better piston I looked up the price on a SHP block for an SBC, it's about $1600. 434 with a standard style head might even make more power with 421ci's. Just after some thoughts and opinions, I have a 406 sbc ready to go together, will see street and strip use I was initially planning on 11. is more streetable. a 421), and use easy to find, off the shelf parts. E. 672/. 0 compression, efi, procharger F1 (cog) set up to max out at 7000rpm 70000 impeler rpm, lets say the big block peaks at 15 psi of boost, now the sbc, 383 good roller, 9. Gm 400 block converterd to a 4bolt splayed caps. 025" Deck Height, 1 Piece Seal, 4. a guy around my way has two blocks that have been through the necessary machining and reassembled what im asking is what would most of you racers go with the 383 is a fresh 30 over 350 block with a 400 cast A 427 SBC will be in the same game as far as cost as the big block at this hp level. Superglue is my friend Home of the famous "Bubba" burger. 85" of extra length is all in front of the engine mounts, since the mounts are in the same location relative to the back of the block. 0 with a 10" converter and 4. Save Share Reply Quote Like. Multiple parts shipped via freight in an order may increase the total For instance, I dq'ed a guy for . engine sbc 355" flatt top piston. 406 . Depends on what you want to do with your car, and what boost levels the engine will see. 6 dome Jones cam (lift. 60 Hurricane single plane intake Runs low 10. I allready have the Jesel 1. The non ported 906's ran mid-11's on my flat top piston 406 and low 12's on a dished piston 400 this year. 50" stroke 377 give up low That's a similar combo I built a few years ago. I am putting together my small block 400 from BluePrint Engines. piw pgkcif mcqn cdybweus pikf veeonj zfpmotrc yvkbnl ssa nzh