406 vs 421 sbc for boost It tells the engine the proper time to breathe in, when to exhale and keeps the spark plugs firing on queue. Is there any disadvantage to a 4. Dec 16, 2014 · I am wondering what differences there are between the sheetmetal on a 406 vs. S and I am building a small block chevy 377 (4. The engine consists of the following: forged 4340 crank, forged 6" H beam rods w/L19bolts & tool steel wrist pins Tech Help. Dec 22, 2008 · 421 vs. a good cam for a 406 is an old Lunati solid Dec 21, 2009 · Technical Section. If you going to stray nitrous gap the rings accordingly. Aug 26, 2020 · Modified BPE 400 SBC — NA vs. 11 posts • Page 1 of 1. 5:1 comp, sportman II ported heads, victor jr. Engine Apr 19, 2025 · 65 Beaumont 406 tunnel ram faceplated TKO600. I rounded the dome on all corners, it is about . Plus cam to rod clearance is Nuts with a 4. The pistons used in Heavy-Duty assemblies are built for high boost levels or bucket-loads of Feb 3, 2008 · My old -306, '56, 265 trough sparkplug heads have 60 cc chambers and 118 to 120 intake ports vs the old 283 Power Pack heads being 60 cc and 137 to 140 CC intake port sized vs the early medium valve 315hp/283 FI engines and 327 -461x heads at about 62 to 64 cc chambers and 170 cc intake port sized. Even then the cylinders may stand up but the 400 block is notorious for having weak webbing in the mains. ProCharger F-1A, E85 (non IC) Our first test with boost was to install the ProCharger F-1A supercharger and run it on the injected small-block using E85 and no intercooler. Chris did a dyno test of different SBC manifolds, most ported and an as-cast Pro-Filer/Wilson. 00 assembled $6,595. 90 nitrous 335" sbc 12. 0:1 w Feb 4, 2016 · You can and should build the two bolt 400 to a 406. 875. 542 lift, 112 LSA), QFT 750 carbs, Tremec TKO-500, Lemons headers, Moser 12 bolt, 33 spline axles & 3. The tip I have is to buy a complete balanced rotate'er from one source. 71 blower and drive Holley supercharger carburetors. But then providing additional flow in the upper lift range from both the increased valve size and seat angle. 704" lift, Billet Hogan's Intake with W2A Intercooler, Holley Dominator EFI on E85, Injector Dynamics ID2000 Injectors, Stef's #1705R oil pan Apr 5, 2005 · what tends to make me crazy is guys that insist on running vortec or similar small port heads and a dual plane intake for max low rpm torque, when I or someone elsae builds thier engine,who then come back and want thier 383-421 sbc to run the big hp/tq numbers and pull hard at 6000rpm and above where those small ports are far past there Jan 13, 2012 · thanks guys on your input. But am starting to get frustrated with the build. 155 bore x 3. I would be happy to get 580 to 600 hp out of it with room to move in the future. 23 compression with the Fel-Pro . 2/1. 12 months NO INTEREST plus tax-free. Top. All the 421's I have built I have used a solid roller and have gone to the . 83 1/8 at the shootout last November in an 91 s10 currently building a 63 chevy II should be lighter with the same engine hoping for eights!!! Mar 4, 2009 · Hey guys! Will a afr 210/76 heads be compatible with a 10-10. 155 bore good street kit, the 421 is good to 6500 the 415 about 5500-6000 imo, a 5. 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 dome or dished pistons - add $50 ATI SB Chevy 7-inch balancer and Pioneer Hd 168-tooth add$450. Lunati custom hyd roller approx 234/244 @ . CNC-Motorsports offers the best selection in SBC 302-350-358-377-383-400-415-434-441 short blocks. Jump to Latest would run the 406 for shorter stroke than the 421 that way you can get a better piston built that way you can put some boost in it Dec 2, 2007 · Hey you guy'sI built a small block 406 for my "73". 1"/45 deg seat. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! This is an expired domain at Porkbun. I'll be using the same 406 pistons and a 4. 15lbs boost 357"sbc 8. The engine: 421 SBC AFR 220 CNC 259/263 108 LSA Aug 21, 2012 · General Discussion - 383 or 406 sbc - 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 crank external balanced with 400 rods forged flat top pistons and the 406 Jul 19, 2006 · Thanks for your reply. 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" Eliminator is the engine your car needs. a 421? The frame rails appear narrower and the track of the axles also appears to be narrower. Best results with 36* timing. 540 Supercharged Pump Gas Big Block Chevy Price; This is the blown 540 Big Block Chevy that kicks out 800 Horsepower and 800 ft lbs of torque with 8lbs of boost on 92 octane pump gas. 523/. I have the "509" 2 bolt main 400 block. 800" stroke than just building the more common 377(from a 400 block) or 383. 025" Deck Height, 1 Piece Seal, 4. I dont not know what you are trying to end up with, but your cam is quite a bit bigger ( duration ) this 406 made 542 HP at 58-5900 RPM. 00 stroke. 85" length rods versus 6. 42 gears Aug 8, 2015 · a 4" stroke SBC should be limited to about 6500 rpm even with good forged pistons and 7/16" ARP rod bolts, but as a WILD GUESS BASED ON SOME LIMITED EXPERIENCE, ID suspect a properly built 421 SBC spinning at a max of 6500rpm, under boost, with a stable roller cam valve train, thats tuned to avoid detonation, in a DART block would have . 78 on pump E85. Dec 2, 2010 · Putting together a 421 SBC ( 4. . Apr 5, 2015 · So as an example, most LS heads are pretty efficient and rarely go above 29-30° NA. I'm having a Dec 2, 2007 · Hey you guy'sI built a small block 406 for my "73". 434 with a standard style head might even make more power with 421ci's. my 350 sbc used stock 5. I've got a complete small block Chevy top end off an engine that I threw a rod through. Drivetrain & Performance. My present 406/409 build project in another thread, I showed where the crank in the block I bought is a Eagle internal balance crank with a 3. I’ve read that rods and Jun 26, 2007 · Body, Chassis and Mechanical. 155- inch bore 400 block and a steel 3. Awaiting the turbo kit I built for it that keeps ac and stock rad location. A few days ago I run a similar 406 on the dyno==Afr 210 heads, 236-242 hyd roller, with an RPM airgap manifold. 00" to move the piston pin away from the oil ring package. We’re going to show you how to build a 422 cubic inch stroker small block that makes 700-plus horsepower that even an LS guy will respect. 11. I had a very nice thick 817 production block, bore and stroke 4. 050" for the exhaust on a 106-108 lsa. 00: $2,245. The wrong application just isn’t going to work properly. I plan on using a Dart shp block. 566 hp/in with a 383 stroker or even down to 1. Compression is between 10. As far as overheating built right with sensible stuff they run great. Anyway I’m starting fresh with this 421 and the heads are not returnable because they were installed. Aluminum heads, probably IK-200 Brodix. Reg: 09-28-07 Aug 27, 2010 · its hard to find a good old 400 sbc such as 509/511 castings. Our short blocks are in high demand among racers of all types worldwide. 8:1 compression, AFR 227 Comp heads, T&D 1. 072" head gasket,TFS twisted valve 13Deg intake with a 62cc Sep 2, 2009 · 383 or 406 small block I currently building a 406 with a 4340 forged scat rotating assembly and a set of 195 AFR heads. Apr 13, 2016 · '69 Camaro - 429 SBC Dart Iron Eagle 9. 875 stroke) 95% street/strip combo, pump gas. Feb 9, 2018 · Chris Cobb at DynoTune put in some major effort so it worth a post to show some interesting results. 155 or 3. 3 compression. Apr 19, 2025 · 65 Beaumont 406 tunnel ram faceplated TKO600. 00: $6,995. Nov 8, 2015 · 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. Quench is one tool to be used on pump gas to avoid detonation. im sure a stock block will work but for how long. JE dish blower piston with 8. 155 X 3. 406 bottom end, GM crank, 5. Apr 20, 2012 · The 421 seems very popular now and the 220 AFR's would be the way to go. I am now entertaining the thought of another build. Sep 3, 2021 · Even though it’s a GM LS world, the Gen 1 small block Chevy remains a popular choice for many builders. 0 sroke crank and 5. 406. 875 Stroke, 400 Main, Eagle 6. 75 stroke. Jul 20, 2013 · 406 SBC M21 3. I feel like there is something holding it back & my thoughts are - Oct 28, 2003 · I currrently have at my disposal a complete (disassembled) Stock 400 small block. 00 unassembled Aug 17, 2012 · But depending on head choice, you may never see any difference in power what so ever with more cubic inch. 1. Anyone done this? Any piston skirt to crank counter weight clearance problems? Apr 19, 2025 · 65 Beaumont 406 tunnel ram faceplated TKO600. They are already a 15 degree motor that can produce big tourqe. Apr 20, 2025 · 427 vs 421 SBC. I dont think that you really need to get extreme with the bore and stoke. 319 best sixty foot. 2 compression, factory 997 open chamber 400 SBC heads, 2. Easier to meet these goals with a big block, so I'd lean that way. 700" LengthPistons: JE Custom 2618 Forged Aluminum, 18cc Dish, Coated SkirtsRings: Stainless Steel Top, Napier 2nd, Low Friction Oil, 1. I have a freind like this, got to have a "different" engine too, cost him more to do a 389 cube small block on a 4. Post by Tartilla » Sun Apr 20, Apr 20, 2025 · 65 Beaumont 406 tunnel ram faceplated TKO600. 10:1 give or take a few points. I was looking at running 5. Your cam selection is way off, you need to look at a solid roller with over 250 degrees @ . Post by Tartilla » Sun Apr 20, Block: Smeding Heavy Duty 4 Bolt Mains, 9. 3liter turbo making Nov 26, 2021 · I am building a 421 sbc with a short block from Ohio crank. We offer quality name brands such as; Eagle, Scat, Callies, Compstar, Crower, Lunati, JE/SRP, Diamond, Wiseco, Mahle CP and Keith Black to name a few. 75 crank to a 3. Post by bigcam406 » Sun Apr 20, Apr 19, 2025 · 65 Beaumont 406 tunnel ram faceplated TKO600. As a matter of fact, my next build will be a 421 CFI motor. 030 over bore. Equipped with our forged 4340 center-counterweighted crank (when available), forged H-Beam rods with ARP 2000 or L19 bolt upgrade and purpose-built heavy duty pistons. 80" Chrysler Blower Bolt Patter Mar 26, 2020 · A forum member had me build a mild 406 for his 71 Chevelle, I thought I would post some pictures. 875 with a Oct 13, 2020 · To try it out, we grabbed a BluePrint Engines 377-inch small-block with forged Scat guts (3. 48-inch stroke/4. 7 Eagle Rods, TRW flat tops, 10. Check out our custom options and packages below Dec 1, 2021 · Hello there. I was wondering if all you hot rodders could give me your opinion on 383 vs 400 or whatever it has to be bored to. 125" BoreCrankshaft: Smeding 4340 Forged Steel, Internal/External Balance, 3. Pistons were a SRP due to the Procharger, cam was 226 @ . Post by Tartilla » Sun Apr 20, Apr 19, 2022 · 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 doghouse is definitely different needing room for only the four cylinder. Jun 18, 2006 · can't get 421" pistons to yeild 8. Dec 19, 2018 · 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. 73's head will be nice. My early big valve -461 heads cc'd at 160 and 66! Jun 27, 2007 · Body, Chassis and Mechanical. Jan 15, 2020 · I had an old 406 SBC that was built back in the late 90's, swapped the heads, cam & intake. 5 ratio Jan 29, 2008 · We run a 421 n/a on alcohol with 18 degree bowtie heads and intake not sure on how much hp it makes but it ran a best of 9. You can even run a carb on one if you want Nov 4, 2010 · Hi guys, Im new to this site, but I've heard of it in the past. Finish line rpm would be geared appropriately to 7200+ RPM. 5 = 4° timing retard from 30° baseline = 26° at 20psi. aluminum heads combined with a rather long duration Isky mechanical roller cam that’s spec’d out at 264/272 degrees of duration at 0. The 421 has a 3. 875 forged crank, brodix single plane intake, and Manley H beams. 325" block, Crower crank, Crower 6" billet rods, Ross pistons (10. 050-inch tappet lift. 5" lift 285/75 tires trailer puller. Anyone done this? Any piston skirt to crank counter weight clearance problems? Jun 30, 2012 · Built this low compression (8. If this is your domain you can renew it by logging into your account. 050 Jun 30, 2012 · Built this low compression (8. The poured compression is 13. 7 comp, street port AFR195's untouched, 242/248@50 Hydraulic roller, Super Victor, 830DP, 1. I’m not new to engines, done several rebuilds but it’s been original spec mostly and never a Chevy engine. Two bolt,cast crank,ARP stud kit with Moroso windage tray,polished and peened pink forged Chevy rods,clevite bearings,weisco pistons,press pins,Comp roller cam 565"/289 /112 center line ,intake,11. But, there are a bunch of good-running small blocks out there. Used May 30, 2014 · The 406 SBC I bracket race has a fully worked Brodix Track 1 head, angle milled to 54 cc chamber, and a small dome piston. Feb 20, 2006 · George Santos has forgotten more about small block Chevy's than most of the "self proclaimed experts" will ever know. Aug 7, 2004 · 3. Even better, the majority of the parts are off-the-shelf items. Why not the tried and true 406 in SBC or better yet a 408 in a LS. I as well as Eric Weigartner offered manifolds and a local to Chris ported up a 2970 as well. AFR 195s were used with a Victor Jr again for the procharger, Holley 770 avenger with a 4 hole spacer, 1 3/4 headers. I have and have had several in all different configerations and the 383 just didn't make sense unless you have a 350 block and a 400 crank sitting Apr 6, 2011 · Funny you should bring this right now. 150 tall. I started building the 383 stroker and mid stream changed it for the bigger cubes. It will probably cost more than the big block at this power level. 155 bore x 4. If you end up going with the 400, I would recommend going with a dart block for $1500 it is hard to beat! as briefly mentioned you can make a 406/421/434, etc out of it and creep into the 600hp range. 875 stroke/6" Rod = 421:thumbup: an easier route is the 415 cid 3. Dec 1, 2021 · 77 Monte 421 Profilers ported by Eric Weingartner, Straub HR 3200 conv. May 17, 2011 · 1973 RS Z28: 401ci Dart Little M, Littlefield 8-71 supercharger @14lbs boost, Callies Magnum crankshaft, Lunati Pro-Mod rods, JE pistons, 7. The cam is hyd roller, 234/238 @ . On high octane fuel I don't pull any timing until 10-12psi and then pull 0. if you're doing a few passes a season I wouldn't lose any sleep over it. Oct 21, 2014 · I want to build a 421 or a 434 this winter. 875 ). Picking the wrong cam is like having a couch potato enter a marathon. 800. Then spray away. Using a 4. I’m looking for any advice on the combination of parts I should use. 0:1 compression? 421" stroke is to long for a blower? A couple builders said that on a street sbc the 406 w/ 871 will make more hp than the 421 w/ 871??? Also the 421 will need fuel cause of the final compression? Basically whats the ideas street CI for a 871 SBC? :sweat: Oct 27, 2010 · I was wondering since racing season is coming to a end i wanted to upgrade my motor from a 406 to a 434. Callies Dragonslayer crank with their Ultra H-beam Rods. My machinist has a set of Dart 220cc heads that he says will flow 292cfm@. looking to make peak horsepower around 7000 - 7200 rpm. 420 lobe I can get away with a 1. A bulk of the money in a budget should be for the top half. I have a procharger f-2. With a nice set of Diamond Nitrous Domed pistons. 646, LSA 110), 950 HP E85 carb, 1 3/4 headers. The engine will be set up for a "tough" street/strip car (more street). Feb 23, 2010 · My 82 s10 lb 8. Currently have a Dart little m block, brodix track 1 heads (64cc chambers), callies 3. Phil was at Sick Week 2025 competing in the Unlimited class where we got details on his combo. 85 rod work? with what piston? would like 13 to 1 gas no nos, heads are AFR 227 100% factory ported, car will be May 30, 2008 · A 427 small block based on a Dart block would be pretty sweet. 155-inch bore) and a boost-happy 9. 00 Oct 1, 2013 · I bought my 434 from white performance. I agree that boost is a great equalizer but it's not free or easy. Jul 31, 2011 · In this tech article CAR CRAFT beginss our turbo small-block Chevy engine build, nicknamed "The Two-Headed Animal", which is being built to withstand copious amounts of boost on 91-octane gasoline Mar 7, 2012 · Here are the dyno results of my 406 build: 406 SBC, AFR 210 heads, 13. If you aren't racing it in some class that has a minimum performance requirement, the 400 will move your tank just fine. Feb 21, 2015 · there are always trade offs between old rods vs. The ATI Blower Balancer has both the 3 bolt SBC pattern and the standard 2. The car is 3500 lbs bracket car only, TH 350 with 3500 stall, and 4. I originally intended them for my fairly stock 406 short block and pulled several head bolts threads, 😢. Oct 1, 2020 · Thinking of building a pro charged big displacement sbc. best torque was 535 at 47-4800 RPM. 480 stroke) that is based off of a dart 372 ci small block that made 470 horsepower and 470 ftlbs of torque and that was with just a mild low 220s @50 hydraulic flat tappet cam and dart pro 1 180cc aluminum heads 9. 477 hp/in with a 406 small-block. I am building a 421 that will have an 8-71 blower on top. Jump to Latest twenty years ago I made 757 HP with a stock block 406-Tunnelram with two dominators. The engine I am planning to build is a 406-421 sbc with approx. Aug 21, 2012 · General Discussion - 383 or 406 sbc - 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 crank external balanced with 400 rods forged flat top pistons and the 406 Jul 19, 2006 · Thanks for your reply. You can run your older trans easily with a 10. Google it, there are plenty of 421s to research on. So 20psi - 12psi baseline = 8psi net boost × 0. It will save you money in the long run. 19 @142 and a 5. It will go in a swb Chevy stepside. 415ci SBC 4. Peak TQ Apr 19, 2025 · 65 Beaumont 406 tunnel ram faceplated TKO600. Aug 31, 2014 · A forum community dedicated to all Chevy Nova, Chevy II, Acadian owners and enthusiasts. I have recently bought a 1972 Vette which, need tons of work( it sat in someones back yard for almost 10 years). Is the bodywork different? The overall Sep 21, 2020 · ^^^THIS^^^ On how to build a 421 cubic inch SBC. 000 H-Beam Rods, JE 2618 Forged +10. Similar short block, but I used a Profiler 210 head with 64cc. in. 00 ATI SB Chevy 7-inch balancer and Pioneer Hd 168-tooth add$450. Complete BDS polished 8. 75" press bent headers into dual 3" dumped in front of the diff. wilson1970 Member Posts: 177 Joined: Sun May 14, 2017 7:29 pm 427 vs 421 SBC. 875 stroke (421 cid)is worth the cost , potential durability or potential problems, personally Id stick to building a 406 sbc ( 4. 60 valves, with what the owner of the engine calls a "fluff and buff" on the ports. 832 stroke 5. 0Compression Ratio: 10. 700" cam and a 950CFM Holley. 2001 tahoe bone stock 1997 gmc yukon 2. 030 over 400, 9. at this point i dont want to rush things with trying to use the stock block to fire up. i have a few things to settle once i get the car dialed in . T39 had the benefit of both higher-octane gas and a timing curve to boost low-end Jan 26, 2025 · 406 SBC, . 050" with . providing similar flow number to the 2. 050, Performer RPM intake with a 770 Brawler carb, 1/2 open spacer, HEI dist, stock GM oil pan. Apr 15, 2007 · C3 Tech/Performance - 408 SBC Recipe? - I have dibs on a 400 4-bolt block. 10 gears. Post by Tartilla » Sun Apr 20, Mar 6, 2008 · Engine Tech - help with sbc 406 - 434 - I have a Donovan 350 aluminum block 400 mains fresh 4. 410-415ci would be my choice unless you go Tall Deck. Crank and rods were purchased in 2006 so they don't owe me anything. 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. This also applies to designing a cam that is suited for your type of induction, be it naturally aspirated, turbo Jun 12, 2018 · Phil Gulledge’s 388 cid supercharged small block Chevy built by PAR Racing Engines boasts 1,300 hp, 40 psi of boost and serious track capability as well as streetability. My brother has a 406 so I thought I should get a 408 built just to maintain bragging rights. I have around $3000 to build this motor. 4:1 e85 homemade 750 225 shot 2001 z28 camaro hooker lt ofy flowmaster slp lid bellows. I have several buddies that i hang around tell me time and time again that a 400 sbc is the only way to fly. 85 stroke, the 427 has a 4. Here are the major components: Jul 1, 2004 · Using Compression to Make Horsepower in a Small Block Chevy - Danger Mouse Part 23. a lot of kits with the 6" rod. Say Scat. It lasted about 10 or 12 runs on the dyno Jan 12, 2016 · If you got a Dart SHP block build a 421 and be done it does not cost any more for the rotator. 5° per LB of boost. new rods. 050, . Username Post: 421 sbc (Topic#332719); 498 chevy Contributor Posts: 529 Age: 73 Loc: hayward ca. 07 comp, ported Trick Flow 195 heads, RPM Air gap Nov 8, 2010 · I'm in the process of building / buying a SBC 400 based short block. 355Which to build? - Hello everyone, I have a question concerning my latest project. I mean cam,heads,intake,carb,and valve train. 383 vs. Feynman "Quality is always remembered,long after the price is forgotten" Drag Race Short Blocks - SBC: 427 Econo Series Drag Race Short Block: $6495: 406, 421 or 434 Sportsman Series Drag Race Short Block: $6995: Drag Race Engines Econo Series - SBC: 427/640HP Econo Series Drag Race Engine: $13150: Drag Race Engines Sportsman Series - SBC: 434/710HP Sportsman Series Drag Race Engine: $14150: 434/735HP Sportsman Jun 25, 2007 · Everyone knows that power adders like boost or nitrous make big gains, but claiming small engines are better than large engines and leaving out the boost part is deceptive. 5:1 to 11:1 (barely pump gas). 1 compression. His old mans shop is legit. 0" stroke. Post by Tartilla » Sun Apr 20, CNC-Motorsports offers the best selection of Small Block Chevy 427-434 stroker kits. intake, 1 3/4 headers with a max of 6500-7000 RPM and was going with a solid lifter cam. 421 VS. 279 +15 +11. 7 rod 4. Jul 20, 2010 · I would NOT use a factory block for a 434 build. what is a cam grinder basing the rpm range on. 406 May 17, 2012 · I was going to get a new 434" SBC short motor put together but took the advice that a 3. What all has to be done to the block to Username Post: 406 vs Supercharged 400 (Topic#234766); ItzCookiez Forum Newbie Posts: 49 Age: 34 Loc: Bay Area, CA Reg: 09-27-07 Feb 4, 2010 · A mild 421 costs much more than a simpler 406 and really won't make any more power, you will just have the benefit of saying it is a 421. 6 shaft rockers. Reed solid FT cam (240/250@. Planning on a Holley sniper efi 421 Small Block Chevy Short Block Price; Motown block Ohio Crankshaft 4340 3. Let’s look at a 377ci small block that initially looks impressive. 000 base circle cam using a Callies rotator using the compstar rods. Would build similar to a couple 383 builds that I have done. Post by Tartilla » Sun Apr 20, Oct 17, 2006 · It's that time to pull the engine. 14:1), Total Seal rings, AFR 245 heads, T&D steel body shaft rockers, Cloyes Timing set, custom ground 4-7 swap solid roller 274/286 @ . The frame and birdcage all appear good and relatively rust free( minor surgface rust). 125 X 3. 00 stroke in a SBC? I've heard that the Find local businesses, view maps and get driving directions in Google Maps. Engine # 2. im trying to beat this guys head in and dont want the stocker to take a dump on me. Mar 3, 2009 · 434 sbc 421 sbc. I got the DART SHP block 31161211 thru summit racing on special financing. So far with a . I see that the 6" rod combo is the cheaper way to go . Looking for something for fun around town and perhaps the strip a few times. 050" and 260 degrees @ . 31 12 bolt "I would rather have questions I can't answer than have answers I can't question" :R. Apr 5, 2011 · 406 vs 421 sbc. 875" stroke 421 would require less clearancing than a 434 or similar 4" stroke engine, plus a wider range of 23* heads would suit, rather than a 4" stroke motor which would require a larger head if I wanted to rev it past 7500rpm. My timing question, with experimentation it is basically intensive to ignition timing. I plan to go forged lower end and it will be going into a 77. Either a "bow tie" 421 from Skip White Performance or a Dart 427 from Terry Rosebush Motorsports. Feb 2, 2023 · 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 assembly and much better flowing heads Block: Smeding Heavy Duty 4 Bolt Mains, 9. Jul 28, 2012 · However - I haven't seen a test / comparison on a 406; the test subjects were always smaller cubic inch engines. T-flow Jul 21, 2011 · I have 4,244 lb 1976 chevy caprice with a stock sbc 400 in it. Oct 28, 2013 · When it was all said and done, this deceptively simple looking Chevy small-block delivered 682 peak horsepower at 6,600 rpm, and a phenomenal 596 lb-ft of torque at 5,200 rpm on 91-octane Jan 10, 2012 · Using our 600 hp as an example, it is possible to reduce the specific output of the 600hp 350 (1. Nov 23, 2011 · Easier to do with an LS than a small block, but that's out. 7 rods and stock crank and I got into it pretty good without any problems. 050 263/273, Lift . 7:1 Methanol with BLP carb. it’s bad ***, but, it’s right at the edge of daily streetable. 040, 415cu is a . 500 and over 300cfm@600 lift using a 2. wilson1970 Member Posts: 177 Joined: Sun May 14, 2017 7 Oct 31, 2017 · I am in the U. 125" valve could offset the 50 deg seat in the lower-mid lift range. 8cc Dome Pistons, 2-PC Rear Seal, Performance Rings and Bearings Included Learn More Nov 16, 2001 · Engine Mods - Which head for 406ci, AFR 210 or Dart 220? - I'm shooting for 475+ out of my 406ci engine. Call white performance in Tn, skip white is his son and cheaps out a lot. One thing to consider big blocks have a huge advantage in head port runner sizes and breath a lot freer. 48-inch stroke crank, this small block used a set of Edelbrock Victor Jr. 708/. Post by 77cruiser » Mon Dec 22, 68 Camaro 427" E85 powered small block, 9. May 14, 2020 · My low 10 second bracket engine will eventually need a refresh and I was kicking around the idea of changing from my 3. 030 over (434 cu in) Small Block Chevy •4. 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 dd/street rod. 904 lifters because of the smaller base circle cams. Jul 21, 2011 · The nice thing about big blocks is the heads start where small block heads leave off. We offer street kits with pump gas pistons to wild fully forged rotating assembly kits to meet your racing needs. Dec 9, 2024 · I don't think going with a larger bore than 4. Dec 13, 2009 · Dark Mode; Light Mode May 29, 2012 · Hi I’m looking to build a 414 421 sbc (3. Aug 6, 2003 · To get 406ci is nothing more than a . It really is a sweet running motor at around 700HP, 600Torq with a . 08 intake (with custom porting). 21 CH. from Jake 200-4r w/ 3. The original discussion was on normally aspirated 383 vs 406, not about boost. 709 hp/in) down to 1. Its a complete virgin block, never been bored or undersized. 700" LengthPistons: JE Custom 2618 Forged Aluminum, 18cc Dish, Coated SkirtsRings: Stainless Steel Aug 26, 2018 · I am finding it hard to accept that I have changed engines & the 421 should have been making quite a bit more power than the 406 & still run virtually identical times & added 1000rpm stall & picked up a tenth in the 60' but nowhere else. I recently purchased AFR heads, 195 street port. Small block will need pretty good heads and a solid roller (not necessary, but much easier to hit 600 hp) but that's not as streetable in my opinion. good power would be possible with a good/decent intake. 850 rods. I can see boring but not stroking in it's future. The only real way to check the block thickness is to sonic check it. 406 sbc, 10. I'd like to share the latest build for my NETO/N Pro-street bracket car •Long block assembly by Big Sal's Racing Engines •Dyno tuning at Bison Engine and Machine •427 . 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. Right now I'm limited to a 1 3/4 header but I might find room for 1 7/8 in time. 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 Jun 22, 2024 · That's a similar combo I built a few years ago. 5:1 compression ratio. The Power Adder SBC Short Block comes standard with many features designed to handle high horsepower levels (Turbo, Blower, Nitrous)The Dual 3/16" Keyway option is highly recommended for supercharger applications. This is why I suggested using a Dart SHP block. 4/1 compression ratio Apr 16, 2003 · Engine Mods - 406 vs. 406 Jun 11, 2010 · A camshaft is the brain of your engine. you can find a set of full lenght headers for the same cost as small block ones. 5:1 pump gas 434 sbc? or will a 421 sbc be more suitable? These are the race ready version heads, im putting in a 69 caprice! Mar 13, 2009 · 421 sbc brodix canted valve heads ported by Kevin Self they flow 460/800 F2 gear driven BS3 with Moran injectors gas or E85 406 SBC with an F2. 15 bore, problem is the block is decked 180. I have a set of allpro 227 heads so i think they Mar 15, 2009 · The larger 2. General engine tech -- Drag Racing to Circle Track. 95 @ 133 mph best motor ET through the mufflers. 6) 406 for a procharger, thought I would share the results. 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. 750, with a 7/16 6 inch rod and a Mahle piston, we ended up with 10. Anyways Im curious on how to build a 421 SBC. I bought a dart SHP, scat 6" forged h beams, 4340 4" crank, probe srs 2618's, bearings, rings, and he did all the machine work. 040 over with a longer stroke crank 3. 580 @ the valve, on a 112. Wonder who has built one and if they'd do it again. What's everyone's opinion on a Jun 26, 2007 · Body, Chassis and Mechanical. It’s been Cadillac V8, Ford V8, Volvo, VW etc and the last time we made any serious engine build for power was well nearly twenty years ago, and that was a VW Beetle 2. 00 spacer. so thats why i choose to get a better block. 02/1. 89 at 152. will the rod side load cause a problem. Jan 8, 2016 · And you can make your own flat plate adapters and use your small block motor mounts. 2/3. Google is your friend. 000 stroke •11:1 compression •Dart SHP 383/406 Small Block Chevy Super Kit Price; Ohio Crankshaft 4340 3. 800" StrokeRods: Smeding 5140 Forged Steel I-Beam with 3/8" Bolts, 5. I drove the small block Blown Alcohol Dragster for the Santos family for about 10 years before Rick started driving so I know them pretty well,,, Sorry we didn't come up with a catchy name, but these assemblies are all business. 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? Dec 28, 2009 · Hello all, I have a question about a future setup. Post by Tartilla » Sun Apr 20, Jun 6, 2019 · C3 Tech/Performance - Scat 9000 crankshaft vs forged - Hello all, Quick question for all you engine builders. Anyway, I Jul 9, 2015 · If you want to build something that probably will have the best longevity. The parts I have include •AFR 220 Eliminators, 1110 competition ported heads, 8027 spring upgrade, titanium retainers, 65cc •Crower stainless steel full roller rockers, 1. BBC VS SBC ON BOOST Jan 3, 2012 · building 388 sbc and have a question about cams in general, cam has rpm range of 3700-7000, how does the cubic inch of a engine change the rpm range of a cam, iam not talking about idle quality or drive ability but where the cam makes power. I'd call it a STRIP/street car. Moderator: Team. sb chevelle the dart block is just Small Block Chevy 415/421 Rotating Assembly Kit, Eagle 4340 Forged Steel Crankshaft, 3. A 409ci is . Supercharged. 155 x 3. 072" head gasket,TFS twisted valve 13Deg intake with a 62cc Apr 14, 2011 · I need some help with our SBC engine build. A very large displacement small block will have more trouble breathing than say a smaller big block, just due to head port runner volumes and the way the runners are designed. 75" stroke)for what your trying to accomplish Id talk to CROWER, LUNATI and HERBERT cams Feb 11, 2012 · As per Lingenfelters SBC book "why build a 383 when you can build a 406" (,030 over 400) for the same money and get 23+ cu. Mar 4, 2024 · The small block Chevy casting numbers will tell you exactly what you have, as externally, it is difficult to tell whether you’re looking at a two-bolt 307 small block Chevy or an SBC 350 4-bolt main engine. 000? what would be my best option for 406-421-434? will 5. 040" bore/3. 4:1 89 s10 blazer 9. 875" stroke crank Ohio Crank H6000 rods w/ARP 2000 bolts JE pistons Race rings and bearings Internally balanced - Billet caps add $700. The 2 bolt vs 4 bolt main 350 is just one of the decisions you’ll need to make, and knowing the power level you’re building for will Nov 20, 2022 · Hello ladies and gentlemen. will the rpm range change in a 327 vs 434 for example Jan 1, 2015 · For the 406 owners, would you recommend 210 or 220 runners? I'm looking at a 406 shortly in the vicinity of 600hp. I went with an Air Gap this last time around on my 406, because I'm making my car more of a street bruiser - not racing much anymore - and staying under 6500 rpms. 2 compression, Holley Strip Dominator intake topped with a 1" HVH super sucker spacer, Cam Motion cam (Duration @. wbixdej rrg rpfznjq knpa qgrdt fxmxpxf sff nplb wazzsdc bziay