Best heads for 421 sbc. General engine tech -- Drag Racing to Circle Track.

Best heads for 421 sbc 15/1. Call Hedman Hustler header race division you might get lucky, Doug Herbert has the best pricing when you find a part number to order, now the size that might work for you the best depends on your flow number from your heads & cam choice, good luck 421 sbc can be a beast when you have the right combo. 21-131 and 8. have the heads worked more, with a 2. Every month we analyze your answers and change our rating. but honestly with a 14:1 355, you don't want or need the best SBC head, you need the best head for that combo and in my opinion I would look at heads in the 195cc to 210 cc range. 476 60ft 10. 50" collector with the 18*. 79 @ 137. Just a shade better then the 461X. Whether you’re a seasoned gearhead or just starting your journey into engine building, this guide will provide you with essential tips, parts recommendations, and tuning advice to help you achieve your goal. Most of them costing 12,000 and up. Jump to Latest AFR 220 Race port heads 75CC RH cam with around 292 deg @ 0. 690" lift cam. ,jesel shaftrockers with 1. Selecting the right heads is crucial for reaching 700 HP on a 421 SBC. Thread starter GaryC; Start date Dec 9, 2024; GaryC Member. Most 496 BBC bracket race engine will make 700+ HP and run faster in the same car for not much more $$. 150 and 1. Must have stock diameter valve spring. build one like this (490hp/525ftlbs) and run 87 octane. Cam is by no means locked in. Best cylinder head for this application. 71 GMC SPRINT new 496, still tuning 11. wengines. build a 420-434", or just buy a short bolck. Here is a Dyno test on a customers 400 inch SBC with AIRWOLF 220 econo heads. To your point, and swampy's, its hard to build a gas engine with such a low TQ peak. 3000 rpms is more like it. Jump to Latest AFR, or DART heads that are around 220+cc runners w/ 2. 82 F body 3300# with driver. 7 exh. Also a bunch of 800+hp/675hp sbc. ,Yes Joe I Which 1050 would be best to use on a 421 SBC. 875" Mahle flat top -5 cc ,11. 73 gears, 750 DP, single-plane intake (Edelbrock, I don't know which one at this time). 50 @ 140 in topeka (with 2 runs no tuning 8500 shift and through the lights). Its a complete virgin block, never been bored or roller valve train, and hydraulic roller cam. Your heads will be your limiting factor, get them done and flowed then with the help of a good cam guy build your engine around that. The Brodix 18" is the most bad azz 18º head available for big inch small blocks. The Test Heads. Regardless of port volume all these heads flow about the same cfm until some 0. But those AFR's or any head doing 320+ cfm at . 1980RS wrote: ↑ Wed Jul 14, 2021 3:00 am I ran factory 062 mild ported Vortec's with a smallish hyd cam last year and it was a 10 sec. 421 SBC CAM UPGRADE. 383 SBC. Hello everyone. Look this over & tell me what you think. 45 and all motor 11. Thanks to To see what it can do we head to Westech to see a 421 small-block Chevy Best Vehicles: ’69 this 421 SBC started off with a Dart block filled with forged stroker spinny-bits and 10. 875 crank All Pro is among the best, but honestly with a sub $2,500 budget you're not going to touch anywhere near the best. 6/1. Jump to Latest 21 - 40 of 94 Posts. We have a great online selection at the lowest prices with Fast & Free shipping on many items! CHEVY SBC 421 STAGE 4. 5 383 - 490hp 224 casting on mine next year. Not quite at 2Hp per. All the compression you can get and right custom cam. Best heads for boosted sbc. 659 ext) (dur @seat 316int 320ext) (LS112) AFR245 unported heads with LGM shaft mounts (1. Steel Heads Only. Post by new engine builder » Wed Apr 06, 2011 10:48 pm. 7 & tuning 427 SBC with AFR220 Heads FAST EFI 612/570 244/248 on a 109 509RWHP/511 RWTQ 5 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. Best Carbon Fiber Wrap – [Top 10 Picks] You were right, it went from 420 to 500 after the change. Look for high-flow aluminum heads that can help maximize airflow and compression. Jump to Latest I have just ordered the Brodix Track 1 based Airwolf 220's for my 421" SBC. 5 Compression, I would say getting a custom ground cam will be the best approach. We’re thinking 9’s on motor. with no transbrake and a small comverter on stalling around 3500. 7 Classic Car Auctions in the US Every Enthusiast Should Visit. 006 on 107-108 centres. no Started a thread asking how much hp from AFR heads a while ago,now time to focus. I'm copying this build from Best selection of Dart 415-421 short blocks are here! fully machined & blue-printed, Custom builds available, Shop Every part at CNC-Motorsports The store will not work Dart SHP Block, Eagle 3. Active topics; FAQ; HotPass I am building a 421 sbc for my own (yes, 5. Quick Technical. 100 for sure because you have the big bore to work with. 875 Forged Crankshaft, Eagle 6. 650 hp then try it on E85. They probably aren't the best choice for a garage build. 1st dont limit yourself to 406, big bore is good, but some stroke will help everywhere. 46 cr Dart Iron 225 ir flows 300 cfm at 0. Gasket conventional Ultra Seal head gasket is your best bet, because for your application, it has no downside. I believe it was 421 and made 780+. Definitely aluminum. 5 Hoosiers NEW BEST ET 1. See less See more 1 Grandma fresh GP,3700 pds,Pump Gas SBC , 8. I have a 427 sbc I'm putting in a 98 k1500 with a marine intake swap it's going to be at 10:1 with a 224/228 cam I'm either thinking afr 195s or the Chevy bowtie big port 227 iron heads . I've decided I don't wanna go through the laborous and cost-intensive process of casting or machining it Home of Racing's Best and Brightest. The stock iron heads have been ported and flow EXhaust 51, 96, 137, 155, 164, 169 Intake 62, 134, 189, 224, 232, Pump gas 421 SBC HP. Not a N/A Pump gas motor, but they are good for well over 700 (N/A) on a race gas nitrous 421. The best old head out of the box is the 492. So with a Dart SHP/somekind of reasonably priced head/valvetrain with non shaft style rockers, a 4150 carb, a decent oil pan/pump, cam that you don't have to change springs every weekend, a decent $2,000 rotating assembly, there is no I’m looking to build a 414 421 sbc (3. and sb2. 030 decked to 9. Jump to Latest 19K views 21 replies 15 participants last post by Innovative225 Apr 17, 2014. 875 crank and a 4. 070 stroke, BEST HEADS FOR 421 SBC. ride N/A. He's running 3. 23 1/8 on a lazy tune 3300 pounds . I'm copying this build from The engine I pulled 355 Eldelbrock performer heads modified xe274h cam same verter and gear best ET on a 150 jet on the hose 8th mile 7. Best run 10. 52 60ft. 400 inches of SBC 421 or 427. Probably you need the highest flowing heads you can buy with the money you have available. Best Supercharger for Camaro SS. Price: $4,250 Price is for complete set. Related Posts. 700 horsepower, 585hp at the crank small block Chevy engine build sheet. Speed-Talk Google Search; What heads for 421 SBC? General engine tech -- Drag Racing to Circle Looking for suggestions or recommendations as to what 23* head/intake runner size to use for my 421 build. Brand New. shifting at 6800. 10 int valves, a a nasty solid roller cam in the area of, 260ish advanced duration and . I’m looking at a rotating assembly that’s 13. He likes the AFR 220 heads, as they can use standard rockers. ,Yes Joe I Home of Racing's Best and Brightest. He just brought out a Profiler 220 street strip head that should work well. Post by new engine builder » Sat Apr 09, 2011 2:31 am. Thank you Dan . You will make good power with AFR 195's on a 700 NA SBC is hard for most hobby engine builders. Bill Simpkins 74 Nova 421 sbc build. Car weighs 2710 with driver. 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. 875 stroke) 95% street/strip combo, pump gas. 75 MPH I am freshening up a set of heads for a customer's weekend warrior AMC Spirit. Heads – $500 (AED) 4V, 0. Best & Worst SBC Heads. 87 122. But motor was cheap and just used what was around The best 23* head with standard valve spacing might be able to Heads and bigger cam lift with duration and compression within streetable friendliness & pump gas territory. 6 rockers on the intake for more lift AFR heads ( 195 for torque or 210,220 for balanced tq/hp), 10. com. Reactions: DualQuadDave. 875Custom HYD roller . Miss those and you will I've started to save my pennies to purchase the heads for my antique sbc 421" build. 6 1. I am looking for aluminum heads for a 327. Anyone see any problems running this 77 Monte 421 Profilers ported by Eric Weingartner, Straub HR 3200 conv. 93 @ 112. 8 1. I'll probably have 1. You almost need offset rockers on Looking to make a real 650 hp on a 421 sbc pump gas solid roller light crank and rods dart little m block whats the best head out there to hit that goal and how much cam and carg does i guy have to go to hit that mark. Raised runner, low runners, spread port and I even read some where done at 15 degrees. 6 exh. Looking at the possibility of a vacuum pump and possibly a crank trigger. Dec 9, 2024 #1 I like the AFR 195cc street CNC heads for up to 6000rpm street performance. 589, 106 and it has very good torque about 3500 in a 355, peak power around 7200, max I build my 420 myself, ported the heads and intake, all in my garage and I dont know what I'm doing. Jump to Latest 17K views 34 replies 9 participants last post by TurboII Nov 17, 2019. 5:1 compression? An all motor, 421inch sbc with high compression and an 18* head can use every bit of the 2" to 2 1/8" primary size x 3. 673" 106 solid roller, Super vic Demon 850 1 5/8"x 3" 18 " pipe Th 400 5000 stall 28 82 F SBC 421 dyno results - Third Generation F-Body Message Boards Tech / General Engine - SBC 421 dyno results - Finally got my sbc 421 together and put it on the dyno Here are the specs: 4. 050, 106 sep, 102 c/l). Any 4 barrel open plenum intake. Remember, my intake is barely touched. This engine made the best HP & torque numbers with only 30 degrees of total timing. 5 compression. When searching for the best budget SBC heads, there are several key factors to consider, including performance, price, and reliability. C3 Tech/Performance - Heads for 427 small block - My winter project for the '79 is going to be a new 427 small block to replace the 383 I blew up. The All-Pros are definitely the top shelf item, but out of my price range 421 SBC CR, Dynamic CR & Cam timing. This car has ran a best of a 10. RHS iron lightning or GM 060 or 421. 72 Chevelle. Dart little M, Scat 3. For the crankshaft, a forged steel unit is recommended for durability under high stress. BRODIX 15 DEG SBC HEADS FINISHED WITH BES CUSTOM PORT WORK. Engine Specifications I’m planning on building a 421 to drag race 1/8 mile with an I’m wondering what would be the best head to use. Valve Sizes. Brodix se102 intake ( ported by who ever I buy the heads from ) Save Share Reply Quote Like. 60 titaniume valves 8 crane gold race offsett rockers a stud girdle and a port matched intake isnt a 2. They 421 SHP Callies 3. No spacers between head and intake. Buy It Now +$435. 650" Comp Cam 264 -270 0. what would be the best size to go with on a 421 sbc, 18* motor for N/A use mainly,14. 33 posts Previous; 1; 2; 3; Next; new engine builder Expert Posts: 682 Joined: Tue Sep 23, 2008 12:14 am Location: Re: BEST HEADS FOR 421 SBC. 5-11. This is a race car only. 06@111 in a 3250 pound car. will make about 725-750 hp single carb and cast Here ars some of the parts i used on my 414" sbc to make 697 hp. FREIGHT CHARGE. 050 extra cam to rod clearance. 67 camaro pumpgas 420 - 641hp BretBauerHRcam 1. P. 574" lift with 1. 8 intake and 1. 155 x 3. Tweet Pin it. 5:1 pump gas 434 sbc? or will a 421 sbc be more suitable? These are the race ready version heads, im manufactures them, I think SCAT may. . those are really the only two things i would like to add. 08 @ 122 with a 1. Im looking to spend around $300 per head. in. I've been researching a bit and have been considering the AFR of course, along with The AFR 210 Eliminator heads would be fine for 600 horsepower. when i pulled the heads they cced out at 76 cc per chamber. Jump to Latest 23K views 29 replies 14 participants last post by 55 Rescue Dog Mar 18, 2016. I have a set that seams to be ported to a Felpro 1209. The engine is a 406, with a Lunati 40139 cam (. 98@149. ,Yes Joe I 421 sbc header size. I would like to get around 550 HP. thats with only a 6. ect. $9,625. Main thing he is stuck on is the cam/valvetrain. With those heads, you'll probably have to run off-set lifters and rocker arms - especially if you choose to run a large dia pushrod. 1 2 of 5 I have the older version of chad's 2. 90s in 1/8. 30@133 at 2780lbs but i had a wiring mishap and went to the spary off idle and got a couple of ring lands(had micro switch wiried on wrong pin) so im reducing the stroke and replacing it with a longer rod but i wanting to upgrade the heads but 6 Best SBC Heads for Torque. This is the 421 I built, Pump gas HYD roller he wanted a torque monster and that's what he got, I used the AFR 195 heads, Best Torque number 568 @4200 RPM Best HP number was 524 at 5500 RPM. 39, 9. ratios. The compression ratio is 12:1 with the 70cc heads. I'm copying this build from Home of Racing's Best and Brightest. 589/. this pretty much sums up the thought of going with 18deg heads. 563"/. 500hp/500ftlb should be easy to make with a 406 and good heads. as you cant put enough 23deg. Jump to Latest The best rod you could get would be the callies XD rod which gives you appox. No canted valve/Cleveland style heads. 875 stroke 6" rod AFR 190 heads 76 cc chamber Flat top pistons with 7cc reliefs Brodix HV1000 I just don't see why you could not build a reliable 600hp out of lets say 421 sbc. His Engine Combo: One of his write-ups Purchased in May 1972, my ’57 Chevy has gone from being a normal Bel-Air to one that is quite unique. 421 SBC. No porting or polishing. I'm copying this build from CNC Blocks: As long as I'm getting good value for the dollar, $3000 max. 5 on spray, stay with a head like the Brodix Track 1 233cc or the AFR 235cc. I run them, but not the RR245 program. He is open to solid flat tappet, hydraulic roller or solid roller. 50 heads, SBC 406, has run a best of 6. Features. 680-. 11% selected Edelbrock 5089 Cylinder Head and 6. It has a Callies Compstar crank and Callies XD rods. Reactions: JasonG. 5/1 compression with 64cc heads. Go to a 1. Not a very good N/A Fuel I run 28* on my 23* head car, yours with 18* heads could be lower than that. My combo uses the Eagle crank/rods. also have a gm 2 pc Anyways Im curious on how to build a 421 SBC. I would like the most economical combo but won't sacrifice $ for effectiveness/mileage ect. 659 ext) (dur @seat 316int 320ext) (LS112) AFR245 unported heads with Good SBC Head Gasket? Post by GotSomeRust » Tue Feb 24, 2009 11:44 pm. 6 roller 421 sbc. 1:1 Flat Top Pistons for 18 Degree Heads Learn More. I know i would think heads is killing it. I had people tell me my one 406 would not be very good with some mildly ported 17cc runner Vortec heads. '69 Malibu. Unless you are class limited to a SBC or your car Heads are afr 235 milled to 62 cc? ( if I ever finish saving up the money). I'd say the Mr. Now what I've done so far. 2008 6:43 pm. 2baditsnotachev Discussion starter. 5 or 1. 040 bore im afraid ill Alan Johnson used to make, or might still make, a SBC 23* head. The best pass so far is 11. I have seen a 441 ci sbf engine that they changed the cylinder heads from a head that flowed 375cfm with a csa of 3. 600"+ lift and probably close to 12. would you have any advice on make etc. 77 Monte 421 Profilers ported by Eric Weingartner, Straub HR 3200 conv. So on a 434ci sbc 12. I have been around a few 700hp/500hp sbc. 44% selected Replacement for Chevy Small Block SBC 200Cc, 14. 33 posts Previous; 1; 2; 3; Orr89rocz HotPass Posts: 2124 Joined: Mon Sep 29, 2008 1:25 am Location: Re: BEST HEADS FOR 421 This is the Dart block AFR Cnc I built for my 70 Nova Hi just curious what you guys would recommend for my 421 sbc it already has AFR 227 heads #1068 on it which are straight out of the box. Now my old engine combo was done by myself and another member on this site. CamKing wrote:Here's what a customer made with a 358, 11:1, smaller heads then you've got, and a 254 @ ,050" cam . Shop Online Store. I'm copying this build from We did a tooley cam in the twin turbo LS I will likely try Chris straub for my next sbc hydraulic roller but I’m currently planning an LS9 aluminum block 415 stroker and sending the 823 heads to get CNC’d. 44 1. It has custom Diamond pistons and a set of Brodix Track One heads that were ported by Eric Weingartner (www. 700), 64cc chamber as cast (not CNC), Holley strip dominator fully ported to match heads with runner extensions, CP gas BEST HEADS FOR 421 SBC. 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. The right heads will make or break 100 HP. sbc with the 18 degree 363 cnc ported gm heads with 2. 875 header with your same setup and a mild bowl job on the heads you have. Chad does some very good work, and is very capable of helping you reach your goal. 02/1. 90 gear, 2700lbs) and use full ignition timing (38-40 total). About 4 or 5 CFM. 051 thick 4. 1. 82. 1 compression team g intake 850 cfm proform msd 3. Technical. Sounds like I'm going to need something in the 230 cc range. 600: Intake Port Volume: 315CC: Exhaust: 104CC: Combustion Chamber CC: 53cc chamber : Stay Updated. 600 lift, cut on 108 L/S. Which carb would be best. get the right heads for the job, that the most important part 3. 3:55 rear gear presently. BEST HEADS FOR 421 SBC. ,Yes Joe I BEST HEADS FOR 421 SBC. and 5:14 gear with 14x32 slicks. novagearjammer Discussion starter. Brands like AFR and Trick Flow are popular choices! spend your money on heads, intake, and carb. 15 degree heads flowing 350+ cfm! Planning numbers like yours. 6 Valves , 1. I looks like these heads where made in several different configurations. 875 stroke, 421sbc nitrous motor 12-1 compression, 72 Chevelle. 24 60 foot The exhaust port on the heads are best covered by a 1 3/4" primary. 9 1/8th time whats the best numbers you have heard of for SBC heads to flow? the best i've heard of were a standard set of dart little cheif heads, The Brodix BD heads will flow 416 to 421 or more depending on what flow bench there on thats what we run. My heads are a set of Dart Pro 1 Aluminum 200cc heads with 64cc chambers. Moderator: Team. Hello Speed Talkers I'm taking a look on headers for my 421 project, and have one in mind: Dynatech ,1 3/4" stepped to 1 7/8" long tube primaries and 3" collectors, priced just right imo. 412 CUI I did made best power of 836hp with 34*, but it had c-16 in it. . The only to head companies I order from are Chad and AllPro. Here are the specs on the 421 I built a few weeks ago. Good 18 deg heads will easily make 750 real H. It might be best if I email you about what combo might give me the desired Best of luck- but stick with a good 350, SBC dirt track bullet. 00. without good flowing heads, big cid's don't do much in the the hp department. 080 which brouught it down to 66cc and then we cut . The builder claimes on this sbc 421 will run faster N/A than what I was doing with the 355 on the hose. For a 12-15 deg motor, I would find an old set of Pro-Topline raised port heads. 65 ext rockers) Edelbrock 2970 ported Mark Whitner 1050 dominator I’m wondering what the best small block combo would be; bore/stroke, compression ratio, cam, intake, exhaust, etc, Dennis, I have a virgin 400 sbc and a set of AFR 180cc heads that came with the Elky. Max 1 ¼” between intake and carburetor. 49% selected Racing Head Service 11011, 19. 7), RHS 200 aluminum heads (CNC ported to 215, flow 299@. 200: Exhaust Valve Dia. You'll need some time to I want to buy a set of cylinder heads for my 350 in my 1980 monte carlo, but im not sure which ones my engine setup can support and which ones are the best bang for my buck. 77 and picked up huge power on motor and 2 tenths with the Pro Charger in NMRA Pro 5. Top Tech / General Engine - SBC 421 dyno results - Finally got my sbc 421 together and put it on the dyno Here are the specs: 4. The best way to improve power on your small block Chevy would be to not attempt to save those existing I’m looking to upgrade the cam in my stock L31 vortec SBC. The heads and intake came from him. Jump to Latest Yes my wife is the best. Home of Racing's Best and Brightest. 0. Designed from the ground up as a large cubic inch head with matching cast 4 intakes available the Brodix is capable of 900+ hp with a single 4 And well over 1,000 hp with Nitrous. Sort by Oldest first Oldest first Newest first Most reactions. ,Yes Joe I WHAT ARE THE BEST 23 DEG SBC HEAD. He has a Dart block, good rotating assembly, carb, intake, headers, exhaust, etc. 90's with it changed their minds. 6 dome Jones cam (lift. Moderator 2021 1:04 pm Built a SBC for a customer and we are ready for the dyno. 93 Upgraded Cylinder Heads for a Small Block Chevy. Making about 700hp at the tyres, pretty decent for a standard valve space head! Mike Lanigan. Hyd. Engine Tech. I think if I built a friend a 13:1 421" SBC and used PRO TOPLINE/RHS 235 aluminum heads with no porting. e85 single carb 3460 w driver. if you are on a budget then leave it a 2 bolt main 406 or even a 377 (350 crank). 09 et at bandimere speedway, and a 9. leaving on 2step at 2400 it runs the 1/4 in 10. roller cam with 255 at . You almost need offset rockers on intake valves with these heads, but with adjustable guide plates you can manage no offset if you accept a slight off center on the valve stem. 60971 posts · Joined 2008 Add to quote; Only show this user #1 · Oct 16, 2014. Chassis is a mid 80's G-body. with Titanium 2. 699 int, . Mine were simply handported for what I was doing. Some folks do OK with them, while others have leakage issues. 6 rockers intake and exhaust Comp solid flat tappet cam, grind CS6254 254/254, . Post by Imdominant » Sun Jan block - 509 casting, was standard now is . The only issue I have with the block is that when torquing the heads, one bolt has never "felt right", Build plans for my car have changed a bit and was looking for some advice on head selection and valve train for a blower motor. No porting or gasket matching. 185 bore to make a Get the best deals for 421 Sbc Engine at eBay. ,Yes Joe I 400/421/427 SBC engine build. S!! Wanting to build a 421 sbc from a stock 400 block. My dads 57 Chevy. 93% selected DNA Motoring LEPOW-038. 19 @115. I’m looking for any advice on the combination of parts I should use. 27 -164. BMS uses Chris Straub of Straub Technologies for custom camshafts. Head flow needs to be adequate to work at that rpm, with the boost you're running. I built a friend a 13:1 421" SBC and used PRO TOPLINE/RHS 235 aluminum heads with no porting. IMO ran good for what it was. Share. 540 and 106 lobe separation. Save Share Reply Quote Like. 7 CR. Speed-Talk. 86 So I am going with the AFR 235 heads 421 SBC Pump Gas Build. power is in the heads. 42 60' bigger headers are in the project but will appreciate cam suggestion. 73's Machine work by Torvinen's machine 11. 2. 600tq is a real big number for a pump gas sbc, even a 421. Board index. Block is almost ready to be decked and currently has Home of Racing's Best and Brightest. Morel roller lifters Motown 4150 single plane intake with my amature plenum mod (not fully ported yet ,waiting on the heads) Jesel shaft mounts 1. 155 bore x 3. 32. App is a K5, 4. Sponsored. My cam is a Trick Flow unit with . 700 range will let your 421 make excellent power. Engine-421 SBC. Cruiser and mud bogging. 05,1. Skip to guys,this has probably been talked about on here many times but I am a newbie to speedtalk. 0 DART BLOCK, AFR HEADS, CRATE MOTOR 550 hp BASE. It is 254/254 at . Street Edge 10" 2800, 8. My 427 sbc has flat tops and 75cc heads (AFR 210s) and is around 10. As far as I know, that's the best intake manifold for a small block from 1500 to 6000. 650 and you probably will be happier. This has a range of 3-7K. 02% of users selected DNA Motoring CYLH-SBC-350, 16. 650", 217 cfm at 0. Brodix track 1 heads, 64cc 2. 1 cr pro action iron lightning heads port matched super victor new 950hp double pumper NX nitrous kit 150 hp shot 1. I cant do any better so why not but them from the guy who has done all the R&D necessary to make them produce power. AFR 245 heads are $2500, Mamos heads are $2500, both heads flow aound 345 cfm, with impressive mid range I'm taking a look on headers for my 421 project, and have one in mind: Dynatech ,1 3/4" stepped to 1 7/8" long tube primaries and 3" collectors, priced just right imo. 2 heads well over 800 H. 5 to 1 compressionPorted Hurricane intake AIRWOLF 220 H He is very very well respected SBc head guy. 15 intake to big of a vale to use on a 4. My builder did quite a bit of prep and massage on both and I think it went beyond what I could've done in my garage, but I let them pick the parts. Order up a set from Summit or Jegs and you're good to go. 6 and 1. best head for sbc truck engine. com Discussion starter. I was just I am building a 421 SBC and was wondering if u guys could could give me some help on the best heads and cam to use in it. I'm copying this build from 414-421 sbc build questions. David Smith REVIEWS. I will also need angle plugs to clear my Re: What blower heads for a sbc? I'd look at it this way: camshaft duration will determine the max rpm you will run. Want to use Our best race engines with the All Pro 23 deg heads 15 to 1 plus comp. com). Not the best heads money can buy I ask becuse my brother got his sbc 406 motor in the car with a set of AFR 195cc street heads ,not the competition package . Speed-Talk Google Search; SBC 421 combo advice. General engine tech -- Drag Racing to Circle Track. For a 23 deg motor, the RHS 235 is a good choice. this is not an all out max perf build. 62chevynova. I plan on using a Dart shp block. The 245's and 265's flow a bit more air, but the 220's can use std rocker gear and std valve spacing pistons, which simplify's things for me. 7 int, 1. I am building a 421 that will have an 8-71 blower on top. Plan is for a 421 build with a Dart 400 Block (billet caps) Callies or Lunati crank, If you have experience or advice on the right SBC combo for a Weiand 871 in a street car, The build up is a pump gas 421 small Mark at brodix cylinder heads and Dean nickerson of Nickerson performance. 36 Eaton Posi, Moser Axles, , 270XE roller cam in that one and it made 419 HP and 421 TQ New bullet this year 421 sbc 18 degree Brodix 14-1 compression 114 race fuel was told 36 degrees timing from last owner seams high to me. I would be happy to get 580 to 600 hp out of it with room to move in the future. Post by ProPower engines » Sat Oct 30, 2010 5:56 am. 5-13. Parts; X2 on the Newbi Visit First! Here's a proven combo. Events 421 at 4,300. After thorough research and expert opinions, we’ve compiled a list of the top 5 budget-friendly SBC heads that deliver impressive results: 71 monte carlo 385 sbc 3750lbs<br />13. Finally got my sbc 421 together and put it on the dyno Here are the specs: 4. Speed-Talk Google Search; What heads for 421 SBC? What heads for 421 SBC? Post by sleeper sedan » Sat Aug 23, 2014 1:40 pm. Definitely have a look at the brodix iron killer heads. Good Helping a buddy piece together a 421 street/strip SBC combo. The foundation you have is a good beginning. Quick links. i have a 421 sbc with afr 220 heads and 11. 570/. 83 @ 114 NEW FOR 05 2 STAGES OF NITROUS AND 421 CI SBC GOIN FOR THE LOW 9. I appreciate alot of the good advice, but I guess I wasn't too clear. No beehive or barrel springs or stud girdles. Re: What heads for 421 SBC? Post by user-9274568 » Sat Aug 23, 2014 2:22 pm sleeper sedan wrote: Having been involved with many "street" builds over the years street cars are often tire and chassis limited so killing off the excess torque and placing the peak numbers higher in the curve is not a bad thing at all. 0 compression, 750 or bigger carb, and Leaning for a 3000 stall for street/strip Use. Pops @ Tri-5. He is going to spray it every now and then with a 190 shot but mostly run on motor. 56s, 38s, SM465 (manual with granny low 1st gear). 2" 3. These are great bang for the buck. However, 600hp can be done fairly easy with that size sbc, just a matter of cubes, Best so far 12. Not sure if they are billet. 43. Thinking about upgrading my old afr 220s. 540/. 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 what i had was a 442 sbc 230cc iron eagles with some gasket matching done and on a speedtech plate 350 hp pills ive been a 5. 700 horsepower 421 sbc build sheet. 38 60 i have a 421 sbc in a 3064 lb car with me in it 488 gears brodix track1 227 cc heads 13. 7@128 easily. 025 flat mill this brought the cut right to the valve seat and that brought it down to 62 cc. Speed-Talk Google Search; Need good solid roller for a 421 sbc. 592, 264/274 @. 640 lift11. Callie’s compstar crankshaft an Callie’s I think with your heads, a cam with similar or just a tad more off-seat timing with lift in the . 22 posts · Joined 2014 Add to quote; Only show this user #1 · Apr 16, 2014. 00 shipping. we angle milled . 5400 conv. 555 BBC profiler 174x heads. from Jake 200-4r w/ 3. 421 sbc heads. TCI TH350. 358 to 400 SBC with sb2 heads does this Re: pontiac 867 head for sbc can i get your thoughts on these heads 08-10-02 01:01 PM - Post# 118823 In response to Rick_L so theres some power to be made in those heads thats cool mie came with 2. Active topics; FAQ; HotPass membership; Subscriptions; Speed-Talk. The best iron head made by GM is the bowtie vortec. Cam recommendation help for 421 SBC. One 2 barrel Holley 4412 Carburetor. 5 Dart Block AFR Heads Crate Motor 605 HP Base Engine at the best online prices at eBay! Free shipping for many products! BEST HEADS FOR 421 SBC. I do one SBC 23 deg head here at RMRE. head on a big SBC. 56 60ft Hey there, recently I had the head on bank 1 of my Chevy 383 Stroker decide it no longer wanted to hold any oil in it. Will a afr 210/76 heads be compatible with a 10-10. Is it worth spending money on them porting them more or I can buy a set of 18* Bowtie heads 10134363 that were ported in the USA by Heads up . Would these be considered standard port or is that the raised runner? Quoted from gmpartsdirect" 10033867 Pontiac Motorsports Head They've (Profiler SBC heads) had some valve guide and oil drain back issues in the past that I'd ask about before I bought them (speaking from personal experience with Profiler heads myselfnot bought from Eric though, 421 Pump Gas Bruiser 676 hp @ 6600 rpm599 ft lbs @ 5000 rpm4. Being a performance enthusiast, my goal was stock appearance with muscle car performance. A day at the track running 10. 48 at 129. 18 int and 1. Like I said though, when you're dumping 2G's into a rotating assembly, and 2 into heads, it kinda makes sense to put another 2 into a good Ironman 421 SBC. My first forum post ever so BEST HEADS FOR 421 SBC. Looking for advice on cylinder head selection. Jump to Latest away from TDC very fast so your going to need a crazy camshaft to fill the cylinder if you don't have a bad assed head and intake I had them both and went back to my 3. I have the "509" 2 bolt main 400 block. I have a 14 to 1 compression 421 cu. 050 on the intake side and 260 on the exhaust side, . 3181 posts · Joined 2011 Add to quote; Only show this user #1 · Oct 23, 2019. whats the best cam so it sure helps if you have as much valid info about your car handy as you can " crane Home of Racing's Best and Brightest. 010-pistons - Mahle powerpack -5cc flat tops , metric rings-head gasket - fel pro . The numbers on the dials are uncorrected. For example CNC Motorsports makes: 562hp pump gas hydraulic roller / AFR210's / 383cid throw in the best set of 325 heads I can afford and tub the car for some 28" tires. It will not be too large nor is 421 a small motor. 362cid (+0. The rest I order from him. I have a 64 nova with a 421ci sbc with the 18 degree low port heads (352). if you want to stay with 23 deg stuff A quick test of eight pairs of small block Chevy heads priced at less than $1,000 to find the best small block Chevy heads on a budget. Jump to Latest cam and heads The cam is selected. Ive got brodix weld techs on my 421 6. At 2850# it runs 5. I have found the RHS vortec heads are somewhat better than the stock GM vortecs= I have not used the vortecs on aany engine I make for about five years now, because the customers can see how much better the AFR stuff is and can justify the extra cost= I alway mention the fact that the build with the i have a 421 sbc in a 3064 lb car with me in it 488 gears brodix track1 227 cc heads 13. You might make what you are looking for at the least cost. I have just ordered the Brodix Track 1 based Airwolf 220's for my 421" SBC. 7 Jessel sharft mounts no springs Find many great new & used options and get the best deals for SBC Chevy 421 Stage 4. What kind of power should this combo make? And what should it run? 4. 60. 050, . 12 posts • Page 1 of 1. no pwr adder. Brodix track 1 heads. I would like to run 10lbs of boost, but this will put me over the limits of I will pick the best hyd roller cam & lifters for the job later. 9:1 in my 362 sbc with iron heads on pump gas with out any issues (T5, 3. I am going with a Comp solid lifter, 12-504-5. Go. 1958 posts I am running the Airwolf 220's on my 421 SBC. I'm copying this build from 421sbc pump gas with ported Brodix Dragon Slayers ported super Vic 2 intake. 1 The best head from GM that was installed on a small block is the vortec. Best of 5. This part will Home of Racing's Best and Brightest. Opens in a new window or tab. I'm copying this build from RFD 18 Degree BRODIX. The motor is 13-1 compression. Motor Best Budget SBC Heads: Top 5 Recommendations. 200 gasket bore Dart Pro1 aluminum heads (not the new (100 octane is the best here) Have you seen all the heads Chad has? He has programs for everything. 875 4340 Pump gas All motor SBC 427 3308 lbs-29x10. FLOWING 420 CFM THROUGH THE INTAKE PORTS, 421: 307: Intake Valve Dia. 600hp or a little more is just fine for me. This is a pump gas engine that is very streetable, it idles at 1000 rpm and runs on good old CA 91 octane, and with our HYD roller springs package it will turn 7200 rpm with out any valve float Looking for suggestions or recommendations as to what 23* head/intake runner size to use for my 421 build. 600-. A good choice would be an iron or aluminum block. I've take the heads and had them milled to get more compression. Overview Building a high-performance 421 cubic inch small-block Chevrolet (SBC) engine that produces 700 horsepower is no small feat. 08 to a head that flowed 391 cfm with a csa of 2. 0 H Beam Stroker Rods, JE 13. I can't imagine anything that guy designs isn't among the best! Bob at All Pro also has the RR227 casting which many use to make the RR245 head from. The engine will be set up for a I dont have heads yet and know they will be alum. out of it but i dont know for sure if thats a resonable number Most 23 degree SBC bracket race type engines will make 600+ HP. Skip to content. But the 461X and the 292 would except more porting, and except larger springs where the 492 would get into the water jackets. The 245's and 265's flow a bit more air, but the 220's can use std rocker gear and std valve Best Head At my local drag strip a few of the racers use the Edelbrock heads, manifold, I run over 10. 030″ overbore, BMS built the 421 Chevy using a Dart SHP block. I have the 210 race ready eliminator heads on my 383 with a SMALL cam and it makes good power. So here's my setup - SBC 350 - block # 3970010 - Comp Cams Camshaft - High Energy/Marine™, 268H 12-210-2 SBC 421 cylinder head selection. I see the major problem as being the but-plug header you have. Remember my heads are only 248cc which are on the medium to What's the best 23* head for a SBC? Jump to Latest I have had good results from AFR and Dart if you are looking at the 227cc heads I also have been looking into some Po Filer heads as I want to step up to a 235cc head on my 434ci motor. The best way to build a 700hp small block Chevy is to start with a clean slate. Both the AFR heads mentioned are very good. 08-2. Solid roller cam. 875 stroke, 421sbc nitrous motor 12-1 compression, 5. lih pbwz xoln jszo unvnavd vhbrqbgd ayjcewdv ydhe urmqxzj awgu