Max lift stock 460 heads 6:1 rockers which puts the max valve lift to . Intake valves have 5/16 in. com. I am building a big block 454 and have a few questions about the valve train. My Builder selected the M-6250-A443 camshaft and it has . 6/400, 351 Cleveland - Max lift with stock valve springs? - Hi I'm just wondering what the max lift is that you can use with the stock valve springs. 200 lift went up to . com Jan 4, 2024 · Years ago I ran a set of C9VE heads with a Crane CCH-304 Commander kit which had nearly identical lift specs,I had the guides cut for positive seals and the spring seats cut for the springs and we checked the guide height for retainer clearance for that lift but don't remember if we had to cut them down, I would check to make sure, it could make a good day shitty. and . * stock heads (dove-a) withcomp cams 926 valve springs (good to . They should have a 2. Mar 24, 2014 · I am contemplating a head upgrade on my 350ci motor. 550" OD Solid Roller Dual Valve Spring, 220 lbs on seat, . Jan 15, 2012 · That Lunati cam is about the same specs as the old comp 268HE cam and will work fine. Hope that helps, Dave Jul 26, 2006 · Big Block V8 - 385 Series (6. 600 in. 750" Max Lift Fits All OEM Bolt Pattern Manifolds, Uses Full Size Spark Plug AGF-22 Uses Felpro Gasket 1018 or 1028 Head Bolts Take 65 Ft. Blue Thunder has long been known as a leading manufacturer of high performance cylinder heads for 460 Ford high performance and racing engines. The Blue Thunder 460 cylinder head is available in six configurations. The stock springs can support about . 5cc valve relief flat tops, nominal head gasget. 518 lift. 900-inch. The Vortec heads, as they come with the large valveguide seals, are only capable of accepting a camshaft with a maximum valve lift of 0. Feb 28, 2015 · Add the valve diameters together, (intake and exhaust), and a maximum of 4. What is the largest hydraulic Aug 6, 2009 · For example the first Pro Stock wedge head back in the early/mid 80's was the A-460, then we had B-460 heads, and by the mid 90's we had the C-460 head, then D-460 and the current NHRA legal Pro Stock head for Ford is the E-460 head. For that kind of compression, I am a strong supported of the bigger and stronger 18 bolt heads such as the TFS A-460, the FRPP C-460, or the Pro-Filer and Thor heads. 586". Jan 31, 2015 · I'm starting off with a claimer 880 short block with 11. 451 lift & 202/207 @ . 475 inch of valve lift, but this is a very tight number. 10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, custom traction bars, 4" lift, 35" mud tires Aug 31, 2016 · Intake Duration at 050 inch Lift: 221 Exhaust Duration at 050 inch Lift: 225 Duration at 050 inch Lift: 221 int. If maximum flow is reached at . I would like to install a 218/228 (at 0. Notching doesn't work with C-Heads because the valves have no side cant. That's where we are at now. 529 Max lift. Heads were stock with a 3 angle valve job and had the exhaust bump ground out. Oct 10, 2004 · Hey everyone, quick question. 850 lift. Currently, the engine on the stand has roughly 8-1 compression. A set of Patriot aluminum heads is $795--some people will moan about the imported stuff being junk, but I've used Patriots and Pro Comps, and for the Aug 28, 2017 · 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks - Good cam choice for 460 - I just replaced my old 4180 carb with a new one on my 85 F350 dually with a 460 engine in it. 050" does that sound right ? Thanks Mark Sep 8, 2002 · Also, any cam reccomendations for a mild 302 setup? This is just a temp. I bought 1 over at 3rdgen,org for $35 shipped. 500 inch lift. 76" exhaust valves will help with low and mid lift flow appreciably. Jan 22, 2003 · Big Block V8 - 385 Series (6. Anyway, I did have a valve clipping issue during overlap. Apr 7, 2008 · Can anyone tell me the max lift on a stock DOVE-C head with the appropriate valve springs? I have read on this site that you should stay under . 700 lift springs so this problem never occurred before. 0056" removal from the deck surface per cc. 450-. 470 maximum valve lift). 750-inch of lift, but for testing purposes we decided to go up to . They have have a hydraulic flat tappet only rule. Nov 27, 2011 · I am building a budget motor. 450/. Maximum Power from Ported Heads Courtesy of Scott Johnson With well worked max effort dove heads you can expect a maximum of about 700 to 725 HP given the intake port flow capabilities of Apr 28, 2010 · The HO 068 cam has about 0. In the world of aluminum heads for the 460 as far as I can see is the AFR heads and the 280cc will work good for the stock displacement and beyond if so desired to go up n cubes later. 19's. and the dooer head flow up to ~370 int. What are the stock specs for a 1973-1979 & 1980 and later 460 ford truck engine. 550 lift. nuts ) Pistons: Any 429/460 application Rocker arms: 1. d. You only dig deeper into the cylinder wall with increased lift. been running the set up for a year with out a problem! make 741hp rear wheels. Stock OEM valve sizes are 2. 050 clearance on you spring. You have . 800-inch of lift measuring in at 437 cfm, then tapered off at . Wouldn't be too shy to run as low as . I did the reverse small chamber heads and reverse dome pistons. Apr 13, 2021 · Stock heads are notoriously poor on exhaust side flow, and a big reason for why newer aftermarket cam profiles typically have 10 or so more exhaust duration. 190/ Stock, S/S Exhaust Valves- 1. Serious horsepower for your Big Block Ford engine, heads sold individually and are fully assembled. i noticed that the humps in the exhaust ports are huge and they look quite restrictive. The motor is a 466 with slightly ported DOOE-R heads. 1-Piece 2. Around 0. 550" unless they have the exhaust bump in them. Will be a track/weekend warrior cruiser. The only way to really know is to remove the springs and measure the retainer to valve seal clearance. 460 lift. ported iron, the TFSs beat the ported iron stuff to . All have an improved "Cobra Jet" intake port which is capable of peak flow in the 410 cfm range. 600 lift but maybe not if the heads & block are decked,if using high comp/high domed pistons,and a long duartion large overlap high perf cam so keep that in mind too. 661 at 9. 5/460) - Porting D3VE A2A Heads - Hey guys, im putting together a 73 429 to drop in a truck and am contemplating doing a light port job on the heads. Jul 2, 2008 · For a first post, this is kind of a generic question, but something I need to know, what kind of lift can be safely had with pretty much stock heads? The engine I'm running is out of a '75 town car. 562" intake and . 271 = . 00 Dec 19, 2009 · A set of stock Vortec heads will make far more power than what came on a 400, or damn near any stock production head. Max flow rates are on the order of 325 to 330 intake and 200+ exhaust. At 9. 460 is the max valve lift for stock Vortec heads. 80s or 10. 579" You want . 470 inches. 5:1 compression with 64cc heads and piston that could handle max . Oct 4, 2018 · You won't do that with these SR-71 heads. 484" lift and 206/212 @ . 021-. Can gm 882 heads handle the lift? and will i need new pushrods? thanks in advance for your advice Jun 23, 2010 · From the info i've found on the site about these heads the dove heads flow up to ~350 int. 5 50. 535" min / . 73 ratio- TFS-53400621 Stud Girdle: N/A Oct 7, 2008 · It is generally accepted that 0. Jan 21, 2011 · Those heads are Edelbrock Performer RPM heads for 429/460. 250 it went up again to . Jul 20, 2005 · A) I’d like to have around 9. Feb 1, 2017 · The LT1(#12551705) cams,however,are pretty plentiful used & can be bought really cheap. About . Stock Vortec heads are limited to 0. Lb Torque, Exhaust Bolt Pattern Ford not Chevy ASSEMBLED HEADS INCLUDE; S/S Intake Valves- 2. 460) will I have to do this mod to the vortec heads? :willy: Is this something that an average Oct 11, 2007 · May God's Grace Bless You '78 BRONCO: 508" stroker, TFS heads, Dominator MPFI & DIS, cold air induction, dual 3" exhaust/Magnaflow mufflers, 100HP progressive dry direct-port NOS, A/C, Lentech Strip Terminator wide-ratio AOD, 3:1 Atlas II, modified Dana 44/60-lockers-4. 19" int, 1. I would imagine the pistons are probably 20 in the hole and I will be using standard head gaskets. Newer profiles also tend to have more aggressive ramp rates and lift numbers, to get a little more area under the curve for a given duration. 65:1 rockers add about 4 degrees of duration. " What about max lift on the cast iron non-adjustable rail rocker arms used on the C8-DOVE and the adjustable stamped steel rocker arms used on the CJ and PI Jan 12, 2015 · They did this by increasing the ramp speed as the valve opens, and slowing it as it closed. If the d3s are milled and the block milled compression might be in the mid to high 10s compression wise. lift. 5/460) - max cam lift on stock 78 f-150 460 - I cannot find the specification anywhere. valve lift of 0. 460" lift, you have to make sure your valve springs do not go into coil bind and that spring parts are not hitting each other. Oct 26, 2008 · Same cam same stock springs but no shims. Feb 18, 2009 · Im helping a guy build a motor for the local street stock class. Lift Intake Exhaust . 800 lift $2695. 480 lift , unless the guides are trimmed. 520 max lift. Can I use it with a good set of valve springs? thank you very much Oct 3, 2011 · By the time the cam hits its stride the stock exhaust ports will kill higher rpm HP. I understand their limitations in terms of valve lift in stock configuration. 490" at the valve with factory rockers. The biggest issue in my opinion is the maximum lift these heads can handle when stock. Shouldn't have any piston to valve problems with under . Advertised Intake Duration: 275 Advertised Exhaust Duration: 279 Advertised Duration: 275 int. Scott Jan 27, 2005 · Actually I don't even see the grind on the Crane web site, but the cam card specs it as a 260/272 adv. 510 in. I am leaning toward Vortec heads. Not to mention that the stock heads would only suport about . 74 valves will usually flow 210-220 cfm at . 500" O. I would like to get as Jan 23, 2011 · When you have the heads done and new guides installed have them machine the guides for pc seals and this will open up alot of possibilties. Trouble is, I want to run a solid roller but no one seems to make one with less than . AFR 300 Bullitt Heads. Large 2. 506" min / . 460" ,lock protruded below the Jan 11, 2013 · I used the Scorpion pedestal mount roller rockers on D3 heads with a Lunati VooDoo cam with . 600 lift according to tech) *stock rocker arms (might change out) and stock positive stop studs * comp cams 268h with . The lower the lift at which that number is reached, the better the port design. Feb 6, 2008 · A429 Aluminum Motorsports Cobra Jet heads INTK Lift- stock/ Ported----- EXH Lift- stock/ Ported A-429's as delivered were 322/191 max. 00 pair complete cylinder heads for hydraulic roller with bee hive springs $2695. 516 ex. 552 lift. 150 zero lash and had . 530-. In a 1984 460 with D3VE heads, the OEM stamped steel rocker arm valve train can handle perhaps 0. Sep 25, 2006 · For a high torque application they are a very good choice. 0/429, 7. Intake Valve Lift with Factory Rocker Arm Ratio: 0. Mike is right on this, your max lift with those heads is in the 450 - 460 range. 550" lift max, assuming you have the proper valve train components to go with said Jul 12, 2017 · FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428) - How much lift with stock rockers? - How high a lift can you go with stock non-adjustable rockers? Local guy swears you can go to . 460 - . ratio using new pistons. 063 heads may in fact be able to handle . If I use my stock L82 cam (. 700 lift, the CJ can beat it by 13 cfm, but it still beats the D0VE heads at that lift. My mild single pattern cam sports . I have a membership to Scotty J's site so it looks like that part of the mission is done. at . I was thinking that it was . D Sep 22, 2010 · cams break down like that from improper break-in usually either too high spring pressure (if you are going dual spring take out the inners for break-in) or lack of zinc in modern oils (they sell zddp additive for break-in) or they dont do the rev guidelines for break-in (bring it immediately to 2000rpm and bounce it from 2000-2500rpm for 20-30 min no idling/driving) Feb 10, 2014 · Screw in studs for rocker arm shaft #6009. 700 lift for circle track, I wonder with low enough comp on stock 302 what the max valve lift you can go . 210 ex. Then run around an . 582). 710" maximum lift, - 260* max recommended duration, Max RPM 7200-7400 AFR #8000 10° Steel Retainers 1. 450 lift on a 108 lsa which would give you a little better low and mid range in my opinion. Interestingly these 125 cfm Exh numbers produced by these 302 cid are the same as what the non hi-po late model 460 cid heads flow so it's no wonder why motor homes with these motors can't get out of there own way, lol! Feb 12, 2017 · SCJ heads, lunati voodoo rockersI started to play with push rod length started at 9. 500 lift, I have heard of caams with over . Jun 16, 2005 · Max lift with stock heads Pontiac - Street. Also going to step up to 9:1 comp. 740 lift roller with these heads 2 seasons ago and it ran real well. 745 Stainless Steel Swirl Polished Valves. 26x1. Aug 20, 2004 · The 460 block and the heads have not been decked, the pistons are KB hyper with 2. Serious horsepower for your Big Block Ford engine, heads sold individually. It runs great but has no Sep 5, 2016 · On hydraulic roller applications, you’ll get PAC Racing PN 1940 1. 6 rocker) but I swapped to vortec heads Nov 25, 2002 · I was witness to qtrmiler with stock D0VE-C heads with stock valves and stock valve job(not 3 angle) and 100% unported ran 10. 560"valve lift MAXIMUM; maybe some heads might allow very slightly more. Apr 4, 2010 · It was the smoothest idling engine I've ever built. 040 head gasket. stems. 655 at 9. With the P-51 head, some of the intake ports will be smooth and quiet all the way to . 480 Feb 18, 2005 · Small Block V8 (221, 260, 289, 5. about how Intake valves are titanium. What is the installed height, outside diameter, and lb pressure installed on a 1978 stock 460????? and anyone know what kind of lift I can acheive without spring bind??? Re: Max lift for 462 Camel Hump Heads 11-28-05 07:33 AM - Post# 824747 In response to slimlynn1 you REALLY should measure to be sure!as the springs coil bind,or retainers or v-guides may be slightly differant than average or they may even have been changed at some point, after all those heads are not exactly new and you or the previous owner may have changed things, but generally about a . 5 rockers. Yes a CJ can flow 400 cfm, but at . I'd call a dealer that can hook you up with a custom cam to suit your needs. That was pushing the max lift you could get and I remember feeling bad about not putting aftermarket springs in because the extra lift and wilder cam profile made it valve float at 5500 rpm as opposed to the factory cam which floated at 6200. 540/. You can have the stock guides machined for PC seals but they are usually cut to . 060 = 0. 5-1 compression. Don WCRE/Ace Rod Shop Jan 26, 2004 · On the other hand why don't you step down a cam grind or 2? Check out this crate engine. 270" from stock for increased airflow. 18-bolt design cylinder heads are compatible with Ford Racing M-6010-A500 460 race block only. 477. 700-inch and . 705" I. There were a couple of these used in LT1 motors. C&C B-441 Hemi 3. Lift is one thing but duration and overlap plays a big part on valve clearence. Dec 5, 2016 · Designed for 1968-87 429/460 Fords, these new Performer RPM heads are ideal for high-performance street, drag racing and marine applications. 00 arp pro series rocker studs for p-51 cylinder heads $65. May 8, 2009 · Without modifying the heads I know you can run a Comp 292H cam, which is . 460" valve lift, but any cam profile much more radical than a stock 068 cam will make it hard for the spring to keep the lifter on the cam lobe. This is a nice street combo with low compression engines. motor will never be over 5500, also is the stock valves safe at this rpm , the heads are like new , only 22000 miles on the them Oct 8, 2004 · Here’s what happened when I ran a Competition Cams Comp Magnum 270H (. 460"-. a howards #720141-12 may work well, but the best I've run in a near stock engine is an engle Nov 22, 2007 · Hello everyone. over stock. 76 & prroblem solved. 481". Exhaust Valve Lift with Factory Rocker Arm Ratio: 0. 5/460) - Max lift - Hey guy's does anyone know what a stock D3VE Valve Spring will start to bind up at meaning lift, or what will they take as far as lift from an after market camshaft,. Did run a dual plane and a Torker II. The 1. But doesn't show spring pressure at installed height. Feb 14, 2016 · On a stock iron head GTO 400CI, going over . 480 but my friend recently purchased a cam from a local performance shop and they said the stock springs are good to Apr 24, 2005 · What is the max lift i can run safely on a stock 302 motor? 1. 410" lift with 1. 588" exh lift at the valves. Head studs; either the regular A-429 or Edelbrock studs and you don't use a washer on the outside row, or better yet the ARP # 255-4301 for the old Blue Thunder heads. 700" valve lift before flattening out. B. 454 max lift and the other set for a CC 262XE with (I think) . 120" I. My 545 has the notorious Pro Comp CNC heads with . IF an exhaust header bolt hole breaks through to the exhaust port, don't worry about it. It all really depends on how things were machined. Later I ran a 296 adv duration cam with . Jan 19, 2006 · The amount of cam your engine can take is more determined by the duration of the cam than the lift, and for the most part most cams will clear the stock pistons just fine, most people notch their pistons to accomodate larger than stock valve sizes, what year is the engine and what cam are you looking at installing, no matter what people say will clear you should check for ptv clearance anyways. 500 for 9. PAC Racing Spring 1. 503 total lift. the '915 heads should be limited to around . I am using valve springs set up at 125# seat and 330 open pressure. I got mine back in 1992. Trick Flow GenX® Cylinder Heads, GM LT1, 195cc Intake, Chromoly Retainers, Max Lift . of torque at 4500 rpm with the Performer RPM Total Power Package. With the small bore of the 305 you'll run out of flow early. Some knuckle heads are saying 0. Head gasket: Fel Pro # 1018 Intake gasket: Fel Pro # 1230 Exhaust gasket: Fel Pro # 1420 Head bolts/studs: ARP # 155-3603 ( 12pt. Engine Pro 5X , Jun 26, 2009 SHARE POST #4 Jun 17, 2011 · The as cast SCJ heads will flow less air at . 550-inches OD hydraulic roller dual valve spring with 175 pounds on seat, 0. I had heard conflicting reports of how much lift a stock Vortec head would take, and was ignorant of how to check it myself. Dec 25, 2007 · Help me to understand why a D0VE-C cylinder head that flow, lets say 350 cfm at max lift can only support 700 horsepower while I personally know a small block fords wearing cnc ported victor jr heads that flow 329 cfm and make over 700 horsepower. 429/460 Ford Cylinder Heads. D x 1. 647, and run the procomp high rise manifold (pc3220). Or . 050) = . And you would still want to look closely for any rocker to stud binding (if using stock rockers). 560" lift cam (1. 5:1. Once you begin to go past the . Jul 14, 2007 · I can finally afford to do the C9VE heads that have been sitting ported and waiting. Both of these heads are 1997 castings, and I'm pretty sure they're off the same engine. 550 no problem. 500 lift max. D Feb 15, 2013 · A seller has these numbers listed for a set of Pro-comp 460 heads. 44 bore. The engine is going into a daily driver and not a race Mar 6, 2009 · New Edelbrock Performer RPM 429/460 Cylinder Heads. 656" exhaust. 600 lift. 2-1. 6 FMS rockers - mild porting of the stock intake -whatever cam works with the stock valve springs Thanks. The Bullitt 300 cc heads are AFR’s largest and best flowing BBF heads. The intakes wouldn't swap since they were 2. 238. 19 1. I have a 514 max lift wondering if the stock springs will work Jan 9, 2009 · specs are - 1970 429 bored 30 over, stock crank and piston rods. Sep 18, 2017 · I've used the 272-. Standard big block Chevy exhaust flange bolt pattern. 600 lift comp springs, retainers and Mar 25, 2006 · I ran a . 25" intakes and 1. right now i have comp magnum 1. 530 - 0. 19 or 2. I think in general most of the stock springs will take up to appox. and finally, is there a reliable correlation between PSI reading on a compression test to CR. 572 lift and it liked to snap the shafts on the rocker arms until I upgraded them. First, the stock bottom end on a 460 can take 800 hp! so don't worry about that. 005 deck and maybe . Dec 9, 2005 · Looks like . My heads are some 64cc iron 492s fully ported by Mondello Porting services and are very nice indeed, I have some beehive springs that I'd like to use as I have them already, same goes for some 1. 800″ lift. 600 TFS-30410010 - TREperformance. Isky 264 Mega cam is similar with 216-216 dur. 400 lift for intake or exhaust. Jan 7, 2015 · max lift on stock head without machining. 445 lift in fact. 44 bore, what max size valves, and what max valve lift you can use on a 4. 460" lift is about max for the stock valve springs but they would be pretty tired by now. 499 in. I know stock D0VE-C heads can make well over 500HP. *compression is 9. 700" lift or more to get Nov 18, 2009 · Hi guys, I have never built a motor with stock valve train with this big of a cam (. 470). complete cylinder heads for flat tappet cam $2595. 11 gears, 31. Jun 8, 2017 · I'm a bit wet behind the ears too but have learned a few things. The details on how to increase the retainer-to-seal clearance can be found in the article and comments here: [READ: Ask Away! with Jeff Smith: Blueprint for a Budget Small Block Chevy Build] Jun 29, 2008 · The max lift was 0. Unmachined D3's with production length valves and stock retainers will allow about . It's running a cam with 0. I was told that just over . 1. I got a roller cam with . May 4, 2003 · FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428) - Stock heads. 0/302, 5. and even if the factory guides are good, the extra spring pressure will wipe them out quickly and the new guides will be . Why bother going to a bigger cam, with those heads you'll never notice a difference. 52 roller rockers. May 9, 2006 · 335 Series- 5. 500 inch lift). 500" and require a different seal. Better place to ask these questions, 460ford. 050" safety margin, and using the minimum clearance for each head, max safe valve lift on the two heads would be . 485" on head #2. 625 the same as the SCJ, P-51,A-429, TFS Street, & Blue Thunder. 600 lift cam with the DOVE-Cs. and 220 ex. 420" is the max! Jan 19, 2007 · hi matt, not to quite sure about max lift with stock pistons, but valve springs it is . Trick Flow PowerPort 290 cylinder heads are designed for high performance Ford 429/460 street and street/strip applications, providing significant horsepower and torque gains over similar-style cylinder heads. Jul 11, 2002 · Stage 1: Assembled with stainless steel valves, complete valve job, Manley chrome moly retainers and locks, Viton valve stem seals and Isky double valve springs for up to . Thanks. There is info there on how to install C-heads on a 4. They are available with springs for hydraulic roller or solid roller applications. 60s using a solid flat tappet cam and Port-O-Sonic intake. 050. I believe duration was 219/227. 520 Mar 29, 2014 · Auggie, I just got done building a Eddy RPM headed 472 and I done the same thing, I set up the spring on my height tool on the bench, I put the spring and retainer into it and went to . These heads are fully assembled to work with a solid lifter. Mar 4, 2009 · Scoll down to C-Heads on Smaller bore. 460 Those 882 heads are just a 76CC stock truck head that were never built to use in performance applications ands they have no harden seats either. It worked out very well. 540 lift. 540 before the retainers hit the guides. Trick Flow PowerPort® cylinder heads for Ford 429/460 engines deliver significant horsepower and torque gains over similar-style cylinder heads. As you can see from our data, maximum flow was obtained at . I saw the Summit Vortec heads (part# SUM-151124) show a max lift of . 650" valve lift and well ported heads, (without totally ruining the exceptional mid lift flows), will flow better up to just past . 460" of lift before they bind. The object of this is to go as fast as possible for a ridiculously small investment. I also had a nice set of double valve springs suitable for the cam I was running. 6 rockers i know the valve lift will be about . They only have a max. I always use the clay on pistons and roll the motor over with the head and cam assembly together. 050 . 460 single, max lift 0. 060 feeler gauge inbetween the coils and it was snug but they could be used because he was not going to turn it over 6500 rpm, I told him I would use them if it was me Mar 6, 2001 · While trying to select a cam for my rebuild I have run across a ? - what's the max lift the stock ford valve train can handle and will I be close to hitting the pistons -it's a 91 model and i'm looking at a cam with 208/216 dur. Aug 23, 2020 · Since your orginal opening was about Max Valve lift and you listed a 68 460, those heads will go . 05) cam with . Apr 1, 2009 · Well almost completely stock with the exception of roller rockers and a valve spring kit, what is the biggest lift these heads can handle stock? Stock DOVE-C heads on a stock DIVE926 block with mild bolt-ons. Big Block Ford 429-460 Cylinder Heads with CNC ported intake & exhaust runners. 480 is the max lift you can squeze by without having to machine em down. Jul 27, 2011 · what will the stock c9 springs handle ? im looking at a cam with 500-500 lift, its a 1200-5500 rpm cam. In a best case scenario you will break a timing chain and bend the valves that are still open as the piston cycles up and down in the cylinder. These heads with this cam, and headers should unleash the Horse Power, Right? May 29, 2019 · When the cam lobe begins lifting the valve, if the valve springs coil bind before the valve reaches max lift you will break cam caps or cylinder head castings. Highlights include an extremely efficient chamber design for more complete combustion and exhaust ports raised . AFR designed the 300cc heads for a maximum . 2ish tires, hooker super comps, 3" exhaust, An original Torker on it currently. Using stock rocker shaft (for now). . There have been some Jul 27, 2008 · I run the early A429 heads. 300 looking it over the push rod was hitting the rocker at the fulcrum and pushing the push rod to the side of the cup I suspect causing the increase in lift . More than likely yours have been machined in the spring seat and valve guide for more lift, otherwise it would have been catastrophic failure long before now. Apr 6, 2018 · The original answer was related to modifying the heads to accept more valve lift. Be careful with Long Duration, High Lift roller cams as "valve to valve" can become an issue when maximum sized valves are used. A. 010" is what will fit. i ran a 270 280 @ . Exhaust port is raised 1. Because this head was originally designed as a production piece, the stock Vortec’s max valve lift potential is definitely limited. Nov 3, 2014 · Head #1: . Spring Cups, 10 degree retainers & locks, 7/16" studs & guide plates. 550 lift and 223/227 dur @. This usually occurs above . 470" lift won't really produce more power. This may be more cam than you want to run though. Trick Flow cylinder head recommended components. if i were to do a gasket match Oct 16, 2012 · Hi anyone know what is the maximum cam lift for a stock chevy 350 cylinder head? My 350 is from a camaro 76. 460" lift with 1. Thread starter 69 GTX; Start date Jan 7, 2015; max safe lift at the valve would be . Also what do you think of these possible rules. 800 lift, and you'll spend a good chunk to get it there. Wouldn't go much bigger than . @50 and . 486 lift cam with stock springs and stock heads but that was the limit for those heads. 900-inch lift. 98 intake port. Everything else I have built is been under . actually, you can also use a dial indicator and open the valve to measure the max lift it can Serious horsepower for your Big Block Ford engine, heads sold individually and are fully assembled. 469 max lift which I guess is why they didn't need and retainer to Guide clearancing. Oct 3, 2011 · By the time the cam hits its stride the stock exhaust ports will kill higher rpm HP. 648 lift at the intake valve. They have a longer outside row of studs. Jan 1, 2004 · On the flow bench the iron heads were good for 241 cfm at . 0725-inch maximum recommended lift and max rpm of 6,500-6,700. 16. 700" valve lift than . 539 ex lift with 1. How much lift? - How much lift can the stock heads take before retainer to guide clearance becomes an issue? Nov 23, 2010 · We are going to require stock lift +/- and pull a certain amount of vaccum maybe 15"-17". Find "The Mad Porter". 100 65. 500 inch lift (flow stalled above . " What about max lift on the cast iron non-adjustable rail rocker arms used on the C8-DOVE and the adjustable stamped steel rocker arms used on the CJ and PI May 9, 2006 · 335 Series- 5. I swapped the exhaust valves out of my iron heads. Mar 13, 2009 · So many things determine valve-to-piston clearance issues, such as the pistons, the heads, cam lift, cam duration, lobe separation angle, valve head diameter, etc. C&C C-441 Hemi 2. 15. 455 a bunch and plan on sticking one in the engine i'm working on now, but it's more of a stock replacement/smooth idle cam. Stock 906 heads with the 2. 083" intake and 1. But I was wondering what the folks here think? For what I want to do I probably only want to go to about . 442/. 0. 470" total between the stock positive valve seals and the retainer. That is significantly higher than stock (which most sources say is . It starts up great now even after sitting for a week at a time. 520. 6067 is not listed as a CJ style head however so standard type 460 pistons are used. 481" Vortec limit. 205/207 @ . Its a 75cc chamber, but if they were worked on they may be 80cc's now. There is a lot more to a cam than just the lift. 425- to maybe 0. Then I wouldn't go over . Mar 31, 2008 · And in regards to the unported TFS street heads vs. 500". 720 on the gauge and had my friend put a . That would be assuming your stock springs are new or near new. Dec 26, 2010 · With COMP Cams 252H (with 0. Cut the block to . Jun 26, 2009 · When raising the lift on the 429-460 heads they sometimes run out of room and the retainers will smack the top of the valve guide !! >>>>. M. /225 exh. 470" lift) on a set of stock Vortec heads. Charlie Evans Gary Blair wrote: The Edelbrock deck is . Requires an A460 specific intake manifold and custom-built header. Aug 14, 2009 · Those heads are the worst flowing head GM ever made. bolts ); ARP # 155-4203 ( studs w/12pt. 429/460-Ford Performer RPM Heads Designed for 1968-87 429/460 Fords, these new Performer RPM heads are ideal for high-performance street, drag racing and marine applications. Trick Flow’s potent PowerPort® A460 340 cylinder heads for Ford 429/460 are ideal for use in drag racing, monster trucks, tractor pulling, and other ultra high power, large cubic inch engine combinations. 447 lift with 1. Feb 13, 2008 · Randy answered about the D3s: "Unmachined D3's with production length valves and stock retainers will allow about . Feb 11, 2012 · The Ramjet 350 has stock vortec heads, roller cam, 1. 850 - 1. 487/. " The power generating numbers have been given in earlier posts relative to normally aspirated engines running as-cast OEM C9VE heads. 500" lift the head will produce a better power curve than if the valve must be opened to . So 1. The torker II ran the best for performace even ran around town in 2nd gear down to idle speeds and pulled away better than either of the other intakes even Mar 31, 2016 · D3s are the open chamber heads a 71 460 had flattop pistond stock OP dose not say what pistons are used. Very nice off-idle to 5000 rpm set up that worked well with factory rocker arms, heads, and bottom end. Maximum Power from Ported Heads Courtesy of Scott Johnson Jan 10, 2023 · Much of this gain over the stock 345-hp Boss 302 rating can be attributed to Westech's lower 140-degree engine coolant test procedure and open dyno headers. Stock Buick 350 heads don't flow past . Sep 28, 2011 · 5) Stock D3VE heads, which is possibly what this engine has, can only use cams with max lift of around . 0 Mar 31, 2016 · I run a 460 in my dually a 515/525 lift DOVE heads ported 4. the summit 6401 is a good cam for a near stock engine, but smooth idle. The heads can handle more lift than that but you would need to set up the springs/valve lengths accordingly. 539/. At . Jan 21, 2024 · In high flowing intake ports with the port opening positioned down close to the head gasket surface, the air often breaks away from the port floor and results in turbulence. 5 roller rockers. Lem, makes a good point, there are better heads out there such as the A460 heads. Thats . BBF Head Heirarchy from best to worst 1. 420. 560" lift, by using the single springs recommended for the 280H cam. 487 int. The closest one on the web site is the H-260 which is 256/268 adv. 8/351M, 6. 050, . 060 inches clearance needs to be maintained between the retainer and seal (0. As for VALVE LIFT meaning it's automatically a larger area camshaft it's absurd. Sep 5, 2013 · I think you are hung up on trick flow stating the supplied springs on those heads are good up to . 460" exhaust lift whilst using the unmodified vortec heads! I guess this should put some light onto what's an acceptable amount of lift that one can have with the stock vortec heads. 450-inch lift. I have been porting a set of doves to increase the compression, and have installed 2. 1/370, 7. , with . They are capable of 500+ hp at 6500 rpm (+30 hp more than ported factory heads) and 525+ ft/lbs. 025 off the heads. 494 lift *weiand stealth intake *holley 770 street avenger *headers Dec 28, 2004 · I've heard that using the stock type rail rockers, the ones that came on the 68-72 429 and 460, can only handle like 0. 8/351W) - Max valve lift for a 302 - I have seen some Rv cams with over . May 12, 2006 · Big Block V8 - 385 Series (6. 271 and you get the Max lift you can run with a spring. Reading many 305 builds lately and the max they used in 305s is about 470 -480 but that was with aftermarket aluminum heads equal/greater than 230 at max lift. May 21, 2013 · What is about the maximum camshaft lift for intake and ex you can use with the stock valvtrain rocker arms, Max cam lift for stock valvetrain. 425 valve lift) or Summit K1103 Cam (Duration 272/282, Lift . Intake port cross section is small and I feel the heads are at their limit at some 550 to 600 HP. The plans for this is: -mild port work on the heads -1. The flow should rise very quickly. Dec 28, 2004 · C3 Tech/Performance - Limits of Vortec Heads - I found that you need to mill the valve spring area on the vortec heads to except a higher lift cam. Click to expand Not sure where you came up with the 0. 76 exh. 460 at the valve that is. 509" max Head #2: . 011 to much lift. Even with the Doves the C/R is marginal for that cam. Better to buy C8, C9, DO (’68-’71) heads or keep the stock heads and buy flat top pistons? B) The cam that I have was originally bought for an engine that would cruise at 2600 rpm minimum. 465), stock unmodified GM Vortec Heads, Edelbrock Performer EPS Vortec intake manifold and headers, Do you think I could achieve my goal of minimum 300 hp? PowerPort® cylinder heads for Ford 429/460 engines deliver significant horsepower and torque gains over similar-style cylinder heads. Reef Blue '93 LX 5. 456" for head #1 , and . I did some checking on mine and found that I had only about . HFD Jun 12, 2007 · Manganese Bronze Valve Guides, Dual Valve Springs Rated at . and 204/216 @ 0. Take your installed height of 1. My daily, (93' 350 TBI) is going to be running . run a ford m-6250-a514 cm w/max lift of . because of all the conflicting opinions, but you might consider the Comp 34-235-4 for a mild engine. Heads have adjustable rocker pedestals and some kind of dual valve springs with unknown aftermarket cam, and rail rockers. 710/ Stock Jan 24, 2009 · Big Block V8 - 385 Series (6. Mar 28, 2009 · i have a set of procomp fully port cnc heads (pc3058c) on my 545 stroker and love them. One pump of the pedal and it starts up instantly. 321(1. 271 + . 5:1 rockers and about 0. 76 valves. That was very impressive and it was also 8 or 9 years ago when I lived in Tulsa. 600″ valve lift when the air flow is high. We turned the exhausts to 1. 5/460) - What Lift- 460ci stock valvetrain ? - Hello, could some-one please tell me what maximum lift i can get from a camshaft without having to go to roller rockers and screw in studs, Im planning to buy good brand lifters - springs- pushrods and rockers . Jan 27, 2021 · In stock form these heads flow 160 on the intakes and 125 out the exh. Jul 18, 2008 · I'd deck the block and the heads. motor until I finish school. 050 with . 7 rockers I bolted on to my stock E7 heads with the stock springs? Mach 460. Jan 6, 2007 · Dont forget that max lift also has a very important componant to that mix which is piston to valve clearance. If i decide to go to 1. Alaska442. We stock cylinder heads from World • Pac #1258 Springs Max Lift . Clue to a good port. 530" lift before seal to retainer contact unless the guides are topped or the spring installed height is increased. if i could ever get the car to hook up all the time i'd have a screamer! Oct 13, 2006 · As 327NUT said the Vortecs are the way to go but to run that cam with a new set of Vortecs re quire then to be reworked as I believe there is a max lift of . 00 pair complete cylinder heads for roller cam with up to . 975 • Flow 460 Int 325 Exhaust @ 800 Lift We have heads assembled and ready to ship Apr 19, 2012 · Maximum Valve Lifts With Stock Heads Courtesy of Randy Malik Unmachined D3's with production length valves and stock retainers will allow about . I am running one of UDHarolds cams with . The bottom end is a bone stock 87 460. New they are about $600, but you need a Vortec style manifold to do it right. D x . Oct 16, 2007 · It has Dove A block and Dove heads. 500 in. 520" lift before they hit the retainers. I wonder if Feb 8, 2012 · If the guy is building a drag car and has spent big bucks on the shortblock as you say, then perhaps you don't mean "as-cast OEM heads" but actually mean "max effort C9VE heads. 850(1 13/16) and subtract your coil bind height with shim of 1. 467/. 530" o. The Racers Edge Performance - Trickflow GenX Cylinder Heads offers new performance cylinder heads at cheap discount wholesale prices. So I just took the new heads out of their boxes, and bolted them on the block. Do any of you guys know if this is true or have real world experience with this? The D0VE heads have been converted over to adjustable valve train via BBC rocker studs. On the other two sets, one was set up for a CC 268H with . That's the same size as the SCJ's. The heads being used are ported d3ve with a set of . Will the rail rockers be OK? Note that max rpm w/ jet drive is around 4600 rpm, with rev limiter set at 5200. I thought they were around . /279 exh. He knows more then anyone and can give you the best info anyone ever can. 2. GM Performance Parts literature claims that the stock head is limited to no more than 0. This allows the valve to stay open for the maximum amount of time where the lift needs to be, making sure the cam lasts longer than 50,000 miles. 245/1. 00 pair kaase-p51 special built guide plates $45. Mar 23, 2011 · The #16 have a stock spring installed height of 1. 545" max Allowing for . I generally don't like giving cam recommendations on the H. 560 Nov 3, 2018 · Copied post 611ci sr-71 heads So long post worth the read! Charlie Evans Presley Rae Wilkerson, and Jon Kaase dyno tested my intake manifold today against an Afr,Victor, and a Mafia. While either of these would work well & probably be a cheaper option for you,you will be PAC Racing Spring 1. If there flat tops with D3s compression is going to be over 10 to 1. For example: Lets take a head that flows a maximum of 300CFM. 540 lift with factory rockers though. . 08/1. Question: Are the springs in the Edelbrock heads ok for the Crane #344342 cam you figured out for me ? They have a max lift of 0. 570 lift cams (optional valve springs available for any lift cam, see Ford 429-460 heads below). 65:1 rockers. wpfwtv svw hfnody rneezbh wvsaflm hhhudf rfo vizrf lhmnmf epoe