Gt40 heads on 351w how much hp 351w estimated HP. It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. 0L FORD? CAN I ADD 90 HP WITH THE RIGHT HEADS? HOW MUCH ARE EXPLORER GT40P HEADS WORTH ON A CAMMED 5. Hard to say for sure. There's a GT40 head, and a GT40p. SBF guy. ljeeper Discussion starter. 78: 1. The "GT40" was the multiport EFI PCM HO 351w and was always rated at 310hp (it was available 95-02). 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks. Thread starter 65stang289; Start date Apr 16, 2007; 6. 72 rocker arms and AFR 165 heads. As mentioned above, the mounting holes may need to be enlarged for use on a 351. I believe the GT-40s referred to here are the GT-40Ps and the 351w heads are either '69 or '70 C90E or D00E heads. 7 ratio cobra rockers giving you more hp/tq than the cobra cam setup. Joined Feb 6, 2010 Messages 2,929. Take the heads Let's start by reviewing the evolution of these heads. 8:1 compression, a 4-inch bore and 3. Also there were no 4bbl heads. Feb 19, 2013 #4 351w heads. 8L) Windsor V8 with 8. OK, looks like my spring project will be replacing my 351 heads with GT40Ps. So the '69/'70 heads were far from unique. Only thing is that it has a 94-95 style gt-40 upper intake manifold. its not a ton of money - lec ignition kit, maybe 70 bucks, iron 4 barrel intake, 50 at a swap meet / local. 0. 6RR and edelbrock PERFORMER RPM 351W EFI INTAKE . 4 cc. i have a 351w i just want to no if 302 head will give it more power The H. elkgrovefordguy Discussion starter This is a 351W with non ported GT40 3 bar heads with a trick flow valve spring kit! I ended up going with the E303 cam, 1. Stock valves. The GT40 Cylinder Heads can be engineered to fit a variety of Ford V8 engines due to their versatility and compatibility. Save Share The heads, after chamber blending and de-shrouding valves, have big volume. I was told to port match the heads and get a 3 angle valve job. We are interested in 302's from 68 to 2000 or whenever the last 5. No port work of any kind. The vaunted 289 High-Performance engine was said to make 271 hp. I am installing a set of e street 5023 heads, weiland stealth manifold and 1. 16 /each. 905. Save Share P heads are probably the best factory Windsor head. 1. RacinNdrummin. 8/351W) - 302 Gt-40 Heads Horsepower - How much more horsepower will I gain with gt-40p or gt-40 heads, compared to the stock heads, on a 1982 f150 302? Starting a project to put GT40 cylinder heads on a 1975 351W! This video shows tear down and preparation for the new head! What's a decent flywheel horsepower/torque number to be expected from this combo (GT40P heads, GT40 intake, decent cam, long tubes)? aberdeen MD. Good luck! _____ 1967 Mustang Restomod Coupe There are 4 different types of GT40 head. Pay attention to the different steam-hole port locations used in the gasket gt-40 came on a lot of engines the lightnings obviously and the mustang gt's I even think some lincolns had them. 0/302, 5. 0 Reply. Material Type: Aluminum. Your heads and cam will play a large part in determining that. Get into 58cc heads, I was at the junkyard this weekend and found a good gt40 setup off a Here's my dillema I have a 351W out of a 94 Lightning on the stand right now. There are several aluminum GT40 variants made by Ford Racing Performance Parts (FRPP) but the OEM GT40's and GT40-P's were both cast iron. 480 Duration: 258*/264* LSA: 114* The Comp cam has a duration event very close to that of the Explorer cam. You will need 30# injectors, 24's won't keep up at high revs. Now please don't outbid me on eBay. I'm looking for the right cam for a 351W Lightning engine w/ GT40 heads and Mustang MAF EEC setup. 7 @130 mph - sold it. 6 rockers. GT40 iron heads, lightly ported. Similar to regular GT-40 heads, the biggest difference between the two is that the P-heads GT-40 long block, GT-40 iron heads, B cam, GT-40 intake, 24lb inject, 155 pump, 65mm TB, 75mm Pro-m, BBK fenderwell, MAC 1 5/8 unequal, BBK cat h-pipe, MAC muffs, pullies, 31x19 Griffin, 3:55, B springs, KYBs, Kenny Br subs, Ford HD UCA, Maximum Motorsport: LCA, strut tower& CC plates, aluminimum shaft, Tri-ax, Cobra R hood, Cobra rear bumper Which had a 351 (5. View Next Unread. Cylinder Head Style: Bare. 8/351W) - 351w marine what to expect with head change? - I have a 351w marine engine, I didn?t realize it had gt40 heads until I got them off yesterday. I correct myself, I just read the Ps didn't The iron GT-40 heads were standard equippment on the 1993 Cobra Mustang with the same 5. I'm set on stepping up to a 351W based motor. 30 over, hydraulic lifters, 1. the 289 and 302 superstock combos are getting in the 500 hp region. My daily driver has 16 cylinders and 4400hp @ 1000 rpm. Found a set of GT40 and 40p heads in a local junk yard, which one would be better then the stock heads. Cuz GT40 isn't worth much HP over stock. $781. I don't know the cam specs on the Lightning stock cam. A completely un-touched 302 in the car. 8/351W) 12. could this be my stock intake even tho it has a ported stock lower. Save Share Reply Quote Like. 0L engine that the GT/LX 5. Whether you have a 302, 351 Windsor, or other compatible engines, there's likely a set of GT40 Heads that will fit and work seamlessly with your setup. 0 with a Edlebrock Perf. Info is just regurgitated over and over. Save Share. I asked how much you can mill them safely, he said between. The block is ready for a roller cam, so that's not a problem. This motor used Aluminum Turbo Swirl heads, and a very stout cam, so yours will probably be somewhat less, with peak hP coming at a lower RPM. I get the whole 302 parts make for 302 power, basically I'm wanting to go faster than my gt40 ecam explorer intake set up will take me withought spending 1000+ on used aluminum heads and anoth 350 for a used intake, I should be able to get a complete 351 around my area for 500 or less and maybe spend a few more dollars on need to have parts and get a That, along with a tune and gt40 heads, only added 30 HP to the 351w. 3" into cats, 2 1/2" after them. 3 bars = GT40 4 bars = GT40P When I measured these ones, they measure 63cc. So the GT-40 has to have its headbolt hole made bigger. 1965-up289/302 with 302/351W production heads, flat tappet cam, stamped steel and most roller rockers. Just wondering what to expect with it is possible gain horsepower and the car axcelerate about the same, we race cars not dynos i have astock truck bottom end 351 windsor with cast gt-40 heads shaved . If I go GT40 or(40p) heads, keep the non roller cam/lifters or do the retro fit to the roller rockers Essentially, you can port your E7TE heads, which will earn you about thirty horsepower, or you can upgrade to GT40 heads, which will also earn you about thirty horsepower. 8/351W) - Building stock 5. Edelbrock 77179 Victor Jr Bare Cylinder Head, Ford 289, 302, 351W. I dont fell much power gain over my stock stuff, a little over 4000 to 6000 but thats it, its dead under 4000 rpm. 6 ford racing rollers, cold air intake, shorty headers, x pipe with flows, 5speed, 2. 1966 Convertible (Plant: San Jose, CA) Only trouble I’ve ever had with it is the D9OE 351w heads they used for the ported “Windsor“ test, as they show stock D0OE heads for the stock 351w, then switch to the dog D9 heads for the This 351W has E7 heads that were milled down to 59cc's. 070” (60 to 70 thou). The GT-40 has 310 HP and the Pro Boss has 300 HP. 46: THe time involved in pulling the heads, and doing the work, and the cost of the supplies, and the posibilty of messing up one of the heads. 65stang289 New Member. GT40P Heads how much hp from them. Even though peak hp didn´t go up more than 10 hp, The track time, On BotniaRing was down from 1:34,45 ->1:30,27. The combustion chambers are 60. GT40 iron heads can be has for maybe $100 more than 351 and flow better and keep your compression up. 6 posts · Joined 2007 Add to quote; Only show this user #1 · Oct 21, 2007. It was in a 4 x 4 Bronco which pulled my boat and car trailer so the torque is what I needed more. The GT40 is a high performance part. Email On the GT40 heads, the X are aluminum, P are's explorer/mountaineer v8 and requires unique headers. hi, I have been reading this board for several months while having my 351 being built. One benefit gt40P head will have over other 80's-90's model heads, including the gt40 head, is that it has a smaller combustion chamber much like the original 289 heads. 0 left the assembly line. 69cc chambers. The only thing on Best Intake For A 351W w/GT40p Heads. A set of GT 40 heads would help you quite a bit on this or even better with AFR's or Trick Flow's(the cha ching is not too bad on these since they are ready to go out of the box). IIRC, the GT 40 and 69 351W heads are essentially the same. $ barrel carb 50 bucks give or take. Gt-40 iron heads bolt right on a 351, but the GT-40 has 7/16 "bolt holes and the 351 has I/2". this is with the better intake manifold than the stock class as well as the larger 145cc style 351W/GT40 style port. Mar 5, 2003 922 0 0 Fort walton Beach FL. 0020. Jun 17, 2012 #2 Jun 17, 2012 #2 Yeap p heads aren't much good over 5000 rpms the cam is a little big there gonna need valve springs and the bolt holes are gonna have to be machined for the 1/2 head Small Block V8 (221, 260, 289, 5. This includes the carb'd version, TBI version and Multiport version Small Block V8 (221, 260, 289, 5. 25 Trac-Loc 9-in. GT40 with 7/16 head bolt size (came on OE 302s) GT40p with 7/16 head bolt size (came on later OE 302s) GT40 with 1/2 head bolt size (came on Gen1 lightning and super rare Mustang Cobra Rs) Ford aftermarket GT40s with both size head bolts Only heads with a 1/2 head bolt hole will work on a 351w. Nov 27, 2008 #1 Nov 27, 2008 #1 Hello, I have a 93 LX 5. 40 over? Im trying to figure out what i want to do. 1969 Torino GT Coupe (Dad's car): project car soon to have 347 stroker 4 speed in the floor 1994 mustang GT (My car): GT40 heads and intake, bored . 513 with the retrofit roller lifters performer 2dual plane intake 650holly and long tube headers hp and torque guess please A couple of years ago Hot Rod magazine took a junk yard 351W and made 388 hp with basically stock GT40P heads. I would email Trick Flow tech and see what they say about how much HP the 351W intake will support. Or could it be my 3. Back to Subforum. '98 Explorer intake, port matched to heads. depends on ur goals. Thread Tools. They also installed GT-40-type cast-iron cylinder heads, the tubular “tuned” manifold, tubular stainless-steel headers, larger intake (1. Hi, new to this forum. 350 HP from a 351w. in the 351 heads and '96 Explorer GT40 heads are 65cc. They both use the same heads and block but have different fuel delivery systems. Sent from my iPhone using Tapatalk . Add to Cart-9%. 0 used the gt Its cheaper and you wont be disappointed when you buy the roller block, rebuild it along with the heads only to gain 10 more HP. This forum seems to have a general consensus that GT40 heads turns Broncos into a beasts and its just not the case. To The OP: The Vic Jr's when ported to a 220cc head can flow 320/250cfm and is a pretty good head on a 351. I have an EFI 351, AFR185 heads, 75mm TB/SP and 30# injectors. The chart below it is the same motor with a carb and performer manifold. 1985 f150 351 engine replacement. Oct 8, 2001 207 0 16 Wisconsin. Now a trophy-winning, beautiful burgundy restomod - thanks to sheetmetal donations from 3 other Mustangs as well as some new panels and alot of cash. 7 Cobra pedestal rocker arms E-303 camshaft (. THe time involved in pulling the heads, and doing the work, and the cost of the supplies, and the posibilty of messing up one of the heads. intake, Holley 650 Double pumper, 1 5/8" long tube headers, Timing 16 initial 32 total. I recently pulled the motor to replace all the seals. 95. They also installed GT-40-type cast-iron cylinder heads, the tubular “tuned” manifold, tubular stainless-steel headers, The engine was only rated at 240 hp, but bone stock my truck has 219hp at the rear wheels. I was just considering a top end upgrade. For the time and money invested, it just really isnt worth it to me. L. Your imput is appreciated Just make sure you use ’78 and newer 351W pushrods to use with the GT-40 heads How much power can you get out of a Ford 302? Standard Ford 289 and 302 small-blocks were factory-rated between 200 and 230 hp. My 351w is a 1974 with stock heads and pistons. The 69 and 70 heads, with the part number C9OE and D0OE had 60. with these heads: gt-40'S what's the best supporting cast? with these heads: Edelbrock Performer RPM what's the best supporting cast? Here is a dyno sheet on a 351W, stack fuel injection, mild hydraulic roller cam, Edelbrock Performer heads. i've got a short block started, and i recently came across a set of GT40P heads for FREE ( love family members) i'd love to use these heads, The GT40 looks cool though. Otherwise 3 bar GT40 heads will work just fine, assuming everything else is stock. We specialize in Chevrolet and Ford, and will guarantee every a 351W would recomend like 170cc ish aluminum heads. It powers the truck (4700 lbs) through the 1/4 mile in just over 15 seconds @ 90 mph. They have milled previously. 437 HP and 461 Tq out of a 351W. If you can get 171%- 185% power per cube out an NA engine, the NASCAR boys will pay you 1/2 million dollars a year to do it for them. oem heads , gt40, or p heads are not that much different unless ported which work great on a 302. For $200, you are talking about $7/hp which isn't Which had a 351 (5. Edelbrock | #32577189. . -Ft. 1965-up289/302 with 302/351W production heads, flat tappet cam, stamped steel and most roller Here a comparison of different heads on a 302: +30 HP compared to the stock heads. So far besides the gasket kit, head bolts and spacer doohickeys Vic Wagon with a set of gt40p's and explorer intake set and few other things bring it up higher then the stock 152 hp ya know . 513/. By just changing the cam alone, it raised the hp to 397 (same Comp Cam as I have in my 425ci stroker) and made the torque 431 lb-ft. It is carbureted in an older pickup. GT40 and GT40P heads were originally used on 302's and if used on a 351 will need to have the head bolt holes drilled larger. 54-inch), high-flow ports, high-rate capacity fuel pump, and injectors, revised combustion chambers, a putting the GT40 heads (non P's) headers maybe a cam swap. 4 cc chambers. GT-40 aluminum heads, the 351W Check this out: https://www. No mods required to use the heads on a 289/302. This is a semi- daily driver, with some towing. The E-street heads flow 30% better than G40's so there is up to that much more Performance & General Engine Building - Mild 351w build. com/Ford-04. 86 coupe, 408,glide 101mm. Obviously, Im shooting for great hp and torque while still maintaining driveability. The legacy of GT40 Cylinder Heads adds to their enduring popularity. The motor has GT40 heads on it (iron) and I have a GT40 intake in the garage. 8? I know gt40 heads are the best stock to build, but seeing as I got these for free, Id like to putting the GT40 heads (non P's) headers maybe a cam swap. I want to replace it or rebuild something a little more powerful, say 300 - 350 hp. - I have an old 1993 351w with 180,000 miles on it. The Mustang Cobra GT40 heads were milled to about 62cc. The GT40p is based on the GT40 but it's more for everyday driving. Also the GT-40 has small exhaust ports which makes for a higher exhaust speed exiting, which is a function of creating torque. The lightnings only made 240 bhp with those heads, so you're basically asking to make over 100 more horsepower with a cam swap, and you're even considering not using headers. I understand that it is said With 12cc pistons you're well over 10:1 with 64cc heads. With AFR 185 heads and a CompCams XE274HR you could expect 470 HP/470 tq and 10. And that will still take a lot more than GT40 heads of any ilk. They were so strong that the Chevy guys bitched and moaned so much that the club changed the rules to allow a spec Edlebrock head for everyone. Can tha easily be swapped for a 87-93 upper gt40 manifold? The Ford 351 HO SVO made 385 HP at 5750 rpm and 377ft-lbs of tourqe at 4500 rpm. AFR heads, and headers. The GT40 is for highest horsepower, the GT40p would make better torque and Small Block V8 (221, 260, 289, 5. this cam pushed the peak horsepower to 6,400 rpm This gasket will work on all blocks from the 260 to the 351. P heads flow better and have a better chamber design. People recommend the GT40s a lot for the 302, but not so much for the 351. Founding Member. Does anyone have a clue as to how much HP switching over to The efficiency of long-tube headers over shorty headers is demonstrated on the dyno with 16 more HP and 16 lb-ft of torque on a mild 351W Ford small-block. I need advice from you 351W guru's on what intake will be best for throttle responce, holding power/torque, and perform best at 2,500 Will i feel much of a difference if i had my 351W bored . Today, if a 302 Ford makes 360 hp on pump gas with a hydraulic Alternatively if you can find a set of GT 40 heads that would be the best way to go. Looking into adding ported and polished gt40 heads with comp cams 35-512-8 camshaft and a few other new things. The GT40 first appeared in '93 and can be found on Mustang Cobras and Lightning pickups. The heads were initially designed for a 221ci engine, and weren't really changed all that much as the engine grew to 260, 289, 302 and 351ci. 529 lift at valve) MAC longtubes, 3" collector. 8/351W) - GT40P heads in a 351w - This is a repeat of the same post that I put in the 351w fourm, just wanted a few more people to see it. MAC catback. I think in your case, depending on your setup, it might limit you rather than allow you to make more. Typically, you want to keep your duration figures as low as possible for more torque. Like. Read From what I know you can expect about 40 hp to the crank unless you do more Using the Victor Jr heads and victor 5. GT40 & GT40P Head Specs; Head Type Intake Port Combustion Chamber Intake Valve Exhaust Valve; E7: 124cc: 61cc: 1. Apr 16, 2007 #1 Apr 16, 2007 #1 I found a set of GT40 The GT 40's will make more power. 6 roller rockers, ported stock lower, msd 6a box . html and contact us for more information. I was wondering how much these heads would raise my compression and if anyone trid this before was there any noticeable power gains From what I understand, you'd be much better off with 74 or earlier heads, or even 289 heads that had been ported. 7 roller rockers edelbrock air gap intake holley 750 double pumper . Not really looking for huge hp, just want better breathing engine. They were all the same. 3L Godzilla Swap; Air Intake; Alternators; Cams & Valvetrain; Cooling System Components; Coyote Swap; or 4 bar (GT40P) stamped on the side of the head. 0 cam and 1. A well ported 125cc style head can acheive 440-525 hp. A couple of years ago Hot Rod magazine took a junk yard 351W and made 388 What's a decent flywheel horsepower/torque number to be expected from this I want some better than stock heads on my 351w build. The edelbrock unit has large rectangular runners, and smoother radii in the lower. If you want to save some money, and want more flow, go pick up some used gt-40's. I'm not a big fan of the alphabet cams though 71 Mach1 M code 4 speed (sold) I'm a fan of the alphabet cams and I think the E303 is a great street set-up/match for the GT-40 heads. 0 used the gt-40 so that would be an easy one to narrow down. Tags gt40p intake manifold. 55 gears i have. immengines. RPM II intake, a mild cam, gutted exhaust (H-pipe) and underdrive pulleys. 8 heads? - I have a set of 351w heads off of a 94 f150, and I was wondering if they are even worth building, and if so, if they should work on my 1990 5. You'd lose too much compression with the 351 heads to justify the money saved. go cam motion custom cam. 4fords. Save Share Reply Quote Like 351W Swap Parts; 7. How much depends on your build but typiacally it's around 20-30 more HP. stock Vic Jr's on a 351 r just OK. How much HP and torque do you think I HOW MUCH POWER IS A HEAD SWAP WORTH ON A 5. This is even with stock valve diameters. Ill try stick my head round the back today and get some casting numbers on the heads - apparently some marine 351w's came with gt40 heads. Thinking about stock 5. I was looking at putting on the GT40P heads on. 0 intake and the 002 cam, you will make According to Desktop Dyno 2000, my combination is making 334 HP. You will also make more power with a carb, the recommended intake for the best flow would be the Victor 5. Gt-40 upper with t moss ported lower @560-570/223-232 /114* cam, 65mm throttle body, 1. The gt-40p only came out on 97 1/2 - 2001 explorers/mountaineer with 5. All HO 351w's made by PCM (1992-2002) featured GT40 heads and were given the moniker of "Pro Boss". Don't want to invest $ in gt40 (p) heads and find out they won't work. almost . After that the newer intakes took off and produced better numbers. and Gt-40 iron heads bolt right on a 351, but the GT-40 has 7/16 "bolt holes and the 351 has I/2". 65mm Explorer throttlebody 1. The long, gentle runners provide more torque than the slightly Actually the GT40's are "probably" a better head than any of the normal production heads. THe P's also flow more than than the std gt40 and comes with better combustion chamber and ideal plug placement for reduce emissions. It will support plenty of power. Which I like on track. Heads have also been shaved 0. With GT40 heads: 235 HP @ 4,600 RPM / 280 Lb. 73 rear end 8 Cylinder Engines - Gt40 heads on 351w - I'm looking to squeeze same extra hp and torque out of my 96 351w e4od transmission. Reply Like # Shop Ford GT40 Cylinder Heads and get Free Shipping on orders over $149 at Speedway Motors, the Racing and Rodding Specialists. Would it differ from a similar combo that had say Edelbrocks or alum. 0 came with And they also came with a bigger high lift cam The 1993 351W F-150 Lightning 89 LX procharged 302 515 hp 497 ftlbs 10. My fuel injected 351W made only 315 hp but 365 torque. Plenty of better heads. bronconut73 said: As far as stock heads go they are about the same as the gt40 heads or should I say gt40 heads are about the same as the old 351 Its a non-roller block, 93 I think. ***1988 Mustang GT - Stock. Show Printable Version. Small Block V8 (221, 260, 289, 5. Depending on what the vehicle they were originally installed in 3 bar GT40 heads may or may not be machined to accept the AIR crossover tube found on 302/351 trucks. 060 stock rods and crank flattop pistons gt40p heads lightly ported with stock valves updated springs for a retrofit hydraulic roller camshaft lift. Are the AFR 165 heads designed to operate in a higher rpm band then my intake? I have a 75mm bbk tb left over from a turbo 302 but think may be too big for this setup. From what I've seen, most dont even have GT40 heads. All the goodies are out there, the only thing stopping you is common sense and your Im looking for a new motor for my car and ran into a 351w With Gt-40 Heads and intake manifold complete motor From pan to manifold. gt-40 came on a lot of engines the lightnings obviously and the mustang gt's I even think some lincolns had them. 02. TQ @ 4,000 RPM Comp Cams XE258HR: Lift: . I have some gt40p heads that I was going to enlarge the head bolt holes so they would fit a 351w. phoenixengine. 0L Your limited to 300-320 hp with gt40 heads. 95 GT vert, 351w, TKO500, TwEECer, LT headers, catted H-pipe, GT-40 intake, AFR 185's, 70mm TB. 84 and 1. Former midwest Rustbucket. It's not hard to improve upon the stock sb stuff www. i CAN"T afford alum heads for the 351w, will/would the E7 heads are good, so are GT-40's from 96' Ford Explorers - I have a set on my trail truck and the power difference is nice! Nightstick Bronco guy. The 351 GT40 SVO motor used cast iron GT40 heads and a cam fairly close to the Edelbrock RPM. I was wondering if anyone else has done this swap and if they How about this 1983 351w bored. IIRC, the only mods to the heads were stainless steel valves and a good valve job. 351w heads (early ones) were GT40 heads. But below 5000 rpm, the GT40 actually had higher numbers I just installed a set of gt40p heads, e303 cam, 1. They were the smallest chambers on the 351W heads, and had the biggest ports/valves although they were still asthmatic. 50-inch stroke. $867. The motor was a 347 which is close enough to a 351. Especially the GT40P's-which IIRC came on explorers, but had 7/16" head bolt holes rather than 1/2" (351 uses 1/2" 302 is 7/16"). 480/. Want too know if the heads just bolt on and if my stock intake and headmen Kevin, The Pro Boss is NOT a GT-40. 8 Cylinder Engines - Gt40 heads on 351w - I'm looking to squeeze same extra hp and torque out of my 96 351w e4od transmission. Some people drill the steam holes in the 351w heads, but it's not a necessity. 7 rockers, Victor Jr. Finish: Natural. 8/351W) - GT40P heads? how hard to put on? how much HP and torque? - I have a 1989 f150 with a 302 5 spd. 1987 - 1996 F150 & Larger F-Series Trucks - 351W EFI GT40 head swap - So I have a 96 f250 4x4 5speed with a 351W. My buddy has a 302 that was just rebuilt that he said he would sell me for $200 but im not sure what to do. Commonly referred to as Explorer heads, GT-40P iron castings are found on current 5. 0 with the 351 bottom. Dennis Harrelson 65 2+2, owned since '72 Small Block V8 (221, 260, 289, 5. 8/351W) - anyone have experience with GT40P heads on a 92 351W - ive got a 92 F250 with a 351W that needs a pretty serious rebuild. Bearing in mind that it's a rider truck transmission behind it. com. 8) and accomodate my stock E6TE intake manifold + indmar exhaust manifolds and have valve clearance. Glenn 66 GT FB 351w-toploader-3. Just my . Intake was measured 185cc and exhaust 75cc (was sold as 195/85 ) The Hp peak is quite wide, from 4k-6k 290-310hp. length is 6. Research is showing me that factory GT40's from a Lightning has 64cc's. Reactions: 90lxwhite and JeffB5428. GT40 heads can be found pretty much anywhere you look. Here is my example 347ci 27 year old ported edelbrock preformer heads. O. I know the head bolts are different (1/2 inch for 351). They even let Go stroked big block or plan on getting 425 hp maximum with 351 cubes. There were 3 types of GT40 heads 2 bars = Marine GT40. Need to use 289/302 head gaskets and 351w intake gaskets (Felpro 1250s or 1262s work). I replaced the GT40 heads with GT40p's, also dropped a cam (small lift/495), roller lifters, rockers and flat top pistons in it. 54 valves. Jump to Latest 37K views 28 replies 16 participants last post by MauriSSio Mar 7, 2011. 5:1 CR. So GT40 heads and Lightning intake are a 30 hp gain. 300 HP is fairly easy with GT40'sfor that matter even a set of mildly cleaned up early castings. So far besides the gasket kit, Vic Wagon with a set of gt40p's and explorer intake set and few other things bring it up higher then the stock 152 hp ya know . Anyway the GT 40 actually produced better numbers in the normal street rpm range right up to 5000 rpm. per the builder. 84-inch) and exhaust valves (1. The GT40 is a better flowing head than the E7. Much better than the 351W heads. 0 96 down explorer/mountaineer 5. 060 - 0. 5/8” shorty headers, vortech v3si @12PSI Im sure I’d I have a 351 roller block and gt40 tubular intake. Or you can use modern heads and actually gain The early 351W heads were unchanged from '69-'76 except for internal air passages added in '75. 662 posts · Joined 2006 Add to quote GT-40 heads HP increase Thread starter MikeR351w; Start date Nov 27, 2008; MikeR351w. Which head is best for you would be a question of how you intend to drive the vehicle. 010 F-303 crane roller lifters crane 1. I would add Based on the inputs that I gave it put out a max hp of 351 and max torque of 454. Hot rod made 390 hp and 405 lbs of torque on a 351 with gt40 heads. The stack added 11 HP and 17lb/ft of torque. 0-equipped Explorers. They wont produce as much power when you have 185cc heads and a big cam that needs lots more air. cam has a little better grind when combined with the 1. Steeda Underdrive pullies (waterpump+crank) Smog pump delete BBK Adjustable FPR 250 Right now it is just a Trickflow stage I cam, Lightning GT40 heads, FRPP 1. Its not to be confused with the carb and TBI versions of the HO 351w (which had GT40 heads), which were rated anywhere from 285 to "300+". Depending on the Block, you can get a 351W roller ready block GT40 by far. The chamber on '69 - '70 351w heads were known as the GT40 design. You need intake to take better advantage of it and even then it's not a whole lot. Ford touts the Cobra intake supporting 400hp. Will i feel much of a difference if i had my 351W bored . All of that and stroking with the compression to the low 10s will get you 100+ more hp. SCCA American Sedan 306 Fords make 400+ HP using GT40/GT40P heads. Want too know if the heads just bolt on and if my stock intake and headmen I wouldn't even concider the gt40P heads at all, they will not work. 05-09-2004 11:09 PM. But I want 300HP right now. The AFR 185 or Victor Jr head would work better, my preference is the Victor Jr. No racing or anything. Question: will gt40 or (p) heads fit on my 1987 indmar 351W (5. otvz oxuopae ojdlxt otdh yiha ofwua emkko khbd sydz zctafd

Gt40 heads on 351w how much hp. Joined Feb 6, 2010 Messages 2,929.