With. This is not a criticism but instead consider it to be more of a heads-up. 1979 Indy 500 Pace Car. 69.90.139.244 Most of them are aware of what changes need to be completed. It took him and yours truly eight hours from start to finish, using air tools and a lift to gain access to the header flanges. Required fields are marked *. - I have a 1989 f150 with a 302 5 spd. This modification will help your late-model GT40P heads work better with the old-school carbureted intake setup. The MPH was there to run a little better but the local track is about terrible. For a better experience, please enable JavaScript in your browser before proceeding. An aggressive cam will wake it up a bit. Free shipping. Weiand 7515 xcellerator intake. $700.98. They work, but present their own challenges. That's a good combo in my book. Common sense would suggest that with the heavy lifting complete and the old cam removed, by not installing the new roller lifters along with the camshaft could be asking for the possibility of trouble just a few thousand miles down the road. GT40p heads peak horsepower was [email protected] with 363ft/[email protected] The worked 351 heads showed peak . If this is beyond your technical ability, you could ask a local machine shop to perform the modifications. We've already been motivated to put this engine in a buddy's Mustang. For the first test, we were reusing the stock Explorer cam, so the engine didn't need any break-in time. I just read about this build on the corral.net. K.S. Torque on the other hand isnt something to write home about. I have a 432 HP non Hi Po 289 I built. Both swaps made more sense when parts were readily available at the bone yard for cheap. No-option stripper- I like strippers. Nice to see actual dyno results instead of "butt dyno" guesses. Cast iron GT40Ps as cast flow better than non-Ps due to revised plug location/angle. Your IP: Gt40 heads/intake from a jy explorer, leave the . It's a classic move we've pulled off many times. The action you just performed triggered the security solution. Dennis Hilliard of Central Coast says we can expect to gain three-tenths in the quarter-mile. This time around, we chose a shining example of this junkyard art form. The specs are a conservative 212/218 degrees of duration at 0.050-inch tappet lift but offer a really nice 0.512-inch valve lift for both the intake and exhaust. Our recommendation would be, rather than change the camshaft, you might want to look into adding a set of long-tube headers and a dual exhaust if the engine is not already so equipped. (A starter is a motor, windshield wipers use a motor,electric windows use motors) Any one uses that terminology in my shop will be corrected once, only once. 97% Positive Feedback . And remember ENGINES have been being built/rebuilt/modified for years. These timeslips are from 1280' above sea level. I used Lightning heads on my 302, (GT40 not P) with stock rockers on a flat tappet engine. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. After we installed the heads and with the fan off, he ran a 12.46 at 107.9. Yea. The Fora platform includes forum software by XenForo. How much HP and torque do you think I. Step 2. Cloudflare Ray ID: 7a2e2d95dedea1e4 I added a link to it. There is a better way. This is a common mistake with first-time cam buyers who dont necessarily appreciate that the cam is just one component of the overall engine package. The only one that's close, is #7. 302, GT40P Heads, E cam, 4 into 4, Holley 600, Mallory Unilite, Levy SD T5, 3.73, 15" Team III, firewall mod, trunk mod, trailer hitch, drivers foot box mod, front tow rings. You didnt mention the car this engine is in, but lets assume there is enough room to remove the radiator and any other coolers and perhaps some or all of the front grille and/or brackets before the cam has sufficient room to exit the front of the engine. Yeah, except those. a) ain't early and b) aren't 289 heads. The GT40P heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. We also added a veteran Ford magnetic pickup distributor and used it to drive an MSD ignition system. ***Most important is theStupid question is the one that was never asked!*** I'm wondering how these heads will interact with the paxton 1220 sl supercharger I'm trying to put on. However, when we dyno'd the car before installing the GT-40P heads, the fan was on the car. I have a very good running stock 1981 302 in a F100 short box. HiPo manifolds and Ill be good. SB Ford GT40 Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. Find many great new & used options and get the best deals for FORD GT40p 4 BAR HEADS IN GOOD CONDITION w/ONE BOLT BROKEN at the best online prices at eBay! This will follow the guideline of a 1.6 rocker baseline and factory bottom end 79-95 related 5.0L Mustangs only. Install a used set of 5.0L Mustang "shorty" headers, generally available at auto swap meets for a reasonable price. You'll have to plug the oil hole that is in the engine from the old oil dipstick. We need a build on a 400+ hp 302/6 build. Let us explain. could the gear of off the oil pump drive(i know they're DIS), for the explorer motor be used on his dizzy? You can find them on later model Mercury Mountaineers and several other Ford SUV applications. check out the. The later model distributors had a different diameter shaft than the earlier ones. As with Chevrolet's small-block engine, the aftermarket has had dozens of years to expand the range and reduce the cost of the parts they offer for this engine. Now we know why Dennis Hilliard of Central Coast Mustang is so high on these heads. With the engine reassembled, we boxed up our second camshaft and headed for Westech's dyno. So . What you are trying to do is to increase the amount of airflow through the engine in order to make more power. A forum community dedicated to Ford Mustang owners and enthusiasts. Thank You. Paying a premium for a set of GT40P heads or dumping money into some to get their performance to rival aftermarket is not for me. I had a set of 69 302 heads I ran for a while . people can stop saying that adding aftermarket cam with stock heads is a waste of time. Building a 302-inch small-block to produce 400 hp is really no big deal, but doing. How to Build a Budget 383 Stroker Chevy How do I Increase Horsepower on a 440 Cylinder Head Specifications for a 1969 How to Get More Power Out of a 92 4.3 dragster engine image by Robert Young from, Copyright 2023 Leaf Group Ltd. / Leaf Group Media. The Fora platform includes forum software by XenForo. Well offer one as an example. If they are cheap enough, take them anyway. The gt40p head is considered the best OEM 302 head made. All costing in the end at least another $2k. Build Thread 1965 Fastback Project "Racesteed". Hey all, I'm working on building a 302 with my gt40p heads. Holten runs the factory fan, but he had removed it when he ran the 12.63. I turned it because it was tired when I got it. We decided to test both ideas, so we ordered two roller cams from Lunati: a shorter-duration cam that would deliver decent idle vacuum and maybe make around 320 to 335 hp, and a longer-duration version that might push the horsepower up to perhaps 350 hp. Because of this, your tuneup will probably need to be modified. Or, you could invest in a new set of heads that would also do the same job but you can expect to spend quite a bit more money. That carbureted GT40P motor made 465 on th engine dyno with a .500" 239/244 camshaft, Holley 650 carb and Weiand Stealth intake. In order to make Coyote-type power you will need some expensive, high-flow cylinder heads with a short block that can withstand spinning in excess of 6,500 rpm. Finding Gt40p heads at the junkyard is getting more and more complicated and if you want to upgrade the heads you have to take into account the costs of the machine shop and compare everything to a set of cheap aluminum heads. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. For a better experience, please enable JavaScript in your browser before proceeding. Commonly referred to as Explorer heads, GT-40P iron castings are found on current 5.0-equipped Explorers. Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - GT40P heads? Free shipping for many products! A LOT of them do it these days. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. I have been working on Fords for 40 years and I have experimented with a few tricks of my own. Car Craft mag. Different years can have different combustion chamber sizes but ffor the most part there will be no performance increases by going with 302 heads. A trip to Orlando Speed World provided us with updated quarter-mile times. For both the GT40 and GT40p heads, I STRONGLY suggest upgrading the valve springs. Took me 7 hours to do one head.but they cleaned up real nice. SB Ford, GT40 .575" Lift Max Output II Drop in Valve Spring Kit, Hyd Roller, 140 Lb Seat. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. Have fun, be safe, enjoy. Over $2050 for the 165/185 renegades. Ill do springs and a moderate cam and go for a good, dependable power plant. This will cost additional money but is still worth it, in our opinion. If we subtract the 20 hp that the fan is worth, we end up with a gain of 25 hp. These are among the best of the iron Ford Windsor heads as they tend to flow much better than earlier castings. The longer duration created a slight loss of torque below 3,300 rpm compared to both previous cams, but beyond that mild loss of power, the bigger Voodo out-powered its smaller cousin, cranking out a peak torque of 355 lb-ft at 4,300 (a gain of 7 lb-ft over Test 2) and charging to a peak horsepower of 376 at 6,000 rpm. Assuming this will be a daily driver engine, a short duration camshaft, especially when combined with a four-barrel dual plane intake manifold and headers, will deliver extremely snappy throttle response and the whole combination will increase the torque and peak horsepower by somewhere in the neighborhood of 20 to perhaps 35 horsepower. We took the heads to Mike Slover of Slover's Porting Service in Sun Valley, California, to do this work, plus some basic pocket-porting to improve flowespecially on the exhaust side. We bolted the Ford to the dyno with a set of 158-inch long-tube headers and an 18-inch collector extension to help the low-speed torque, then we fired up the small-block. If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. We've seen what happens from previous Ford experience when power levels above 500 hp tend to either pop head gaskets or saw blocks in half. ported GT-40p, ported cobra intake, 65mm BBK, e-cam with 1.7s, longtubes, off-road x-pipe with flowmasters dumped. I have managed to get 402 horse power from a 289 hipo natural aspirated. this is the price for one head. This needs to be removed and different exhaust valves, retainers, and valve springs added to turn this into a decent street head. how much HP and torque? Aside from the cost of the nitrous itself, this setup should cost you little more than a stock rebuild using all brand new parts. Can anyone give me a little feedback about a '99 Explorer 5.0, and tell me if it's my answer. We then dyno'd the car without the fan to get some consistency and were rewarded with a peak of 316 hp at 5,500 rpm, and 348 lb-ft of torque at 4,000 rpm. For those of you running a carb, or aftermarket intake, you already have a leg up in this area and should see even greater gains in power. Stock valve sizes? There's not a lot of reson to use 351 heads later than '75 since they essentially identical to 302 heads except for head bolt holes. Shop by category. Yank a motor out of the junkyard, clean it up, add a camshaft, intake, and a carburetor, and see how much power we can squeeze out of it. . In an effort to preserve the history of the Early Fox Era, FEP covers the following vehicles: 79-86 Mustang and Capri, 84-86 Mustang SVO, 78-83 Fairmont & Zephyr, 83-86 LTD & Marquis, 80-88 Thunderbird & Cougar, 82-87 Continental, 84-92 Mark VII, 81-82 Granada. FULL DYNO RESULTS. Those heads were unported and had stock valve sizes! But don't think that adding a bigger camshaft will make more power. This is a function of the somewhat wider lobe-separation angle of 112 degrees. Ha! Test 3: Installed the larger Lunati camagain, no other changes. For a better experience, please enable JavaScript in your browser before proceeding. If the head bolt holes are 1/2" or slightly larger, ARP makes the washers and can be sourced from Ford Racing or ARP through a speed shop or Summit, Jegs and PAW among others. Works on all factory cast iron E7, GT40, and GT40P cylinder heads! P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. MAC is the only manufacturer of these headers, and the parts we installed fit like a glove with no problems whatsoever. The car weighs #2835 with driver. I'm running BBK un-equal length shorty's, and I'm able to get all the plugs in, tight, and all plug wires on. I'll save the effort and lighten my front end by 50# with aluminum. At the time, I was still running smog equipment in a 1994 Mustang GT, so I had them drill the back of the heads for the thermactor connection. Since 2003, Jeff has held various positions at Car Craft (including editor), has written books on small block Chevy performance, and even cultivated an impressive collection of 1965 and 1966 Chevelles. many thanks to all you eco-hippies giving me dirty looks and helping me feel llike an overall badass rebel. Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. The kit offers adjustable power from 50 to 250 hp with a simple jet change. I have a 302 Windsor V8 EFI engine that I converted to a 600 cfm carburetor with a Street Warrior intake manifold. If you know him, ask him. However I think the opportunity window is slowly closing. With the P-heads requiring pedestal-mount rockers, we also called up Crane Cams for a set of 1.6 pedestal-mount roller rockers. On the power side, we selected 400 hp as an impressive but reasonable output for our small-block 5.0L Ford. In an effort to preserve the history of the Early Fox Era, FEP covers the following vehicles: 79-86 Mustang and Capri, 84-86 Mustang SVO, 78-83 Fairmont & Zephyr, 83-86 LTD & Marquis, 80-88 Thunderbird & Cougar, 82-87 Continental, 84-92 Mark VII, 81-82 Granada. 302 explorer short block with roughly 80k miles GT40's from a local u pull n pay ($97) weiand x-celerator trick flow stage 1 cam 650 holley double pumper car made 322/329 SAE . Runs well. Well also assume that this engine is running stock exhaust manifolds. bmcdaniel, Feb 17, 2004 #7. v8maverick Member. i know a guy who used to build race engines so he has all the right tools, how much would it help to get the heads ported and polished or anything else he could do to them. Holten tells us removing the fan is worth two-tenths in itself, which tells us the fan soaks up roughly 20 hp. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS. just curious. Not when you can buy a set of Promaxx or AFR Enforcer heads for $1000, that already have decent hardware included. Ford offered a performance head that was a stock part on 1993-1995 Mustang Cobra models and pre- 1997-1/2 Ford Explorers and Mercury Mountaineers equipped with the 5.0 L engine called the GT-40 head (casting ID F3ZE-AA). The combination of this cam with your intake and headers will produce a very nice street engine. The only way to really make more power is to go with a stroker kit, blower and/or heads. I got a set of AFR heads , night and day. Boy, were we surprised with the results. BONUS TEST-FOUR DIFFERENT 302 INTAKES.. The 5.0L with the GT40 head had a 9.0:1 compression, and the 5.0L with the GT40P head had 9.1:1 compression. Everything fits, use the stock rockers and pushrods. Application Fits 1979-95 Mustang 302/351 w/ OEM Small Block Ford Heads Or just play it safe and let the fans ask away about another daring 5.0 TB bolt on or for an exciting surprise, do a LS______ fill in the blanks. Free shipping. So I've got the motor and heads already for my maverick project. That said there are some better aftermarket options for heads also. I've got gt40p heads for it I'll be running, and can't afford better . I got lucky and found a complete Explorer GT40P engine online. In addition, the cam timing was designed for torque, with duration somewhere around 190 degrees at 0.050 with roughly 0.450-inch lift. GT40Ps have 58cc. You can use the stock roller lifters with any size cam you want. Here is the lowdown on exhaust manifolds and VALVE SPRINGS. The GT40 and GT40P cylinder heads are highly sought after, but how do they stack up against other cylinder heads, and is it worth it to upgrade the Fox Body's stock heads? Since the engine is nearly stock, we would want to choose a relatively mild camshaft with somewhat more lift and duration than stock, but again not going too aggressive. Just put some 1.7 pedistal rocker arm on along with a mild camshaft (make sure to use the correct valve springs), you will make over 300 flywheel hp. For all of us interested in Gt40p heads. Again, assuming this is a nearly stock 5.0L with stock heads, the Weiand Street Warrior dual plane intake and 600 cfm carburetor, its important to not become overly aggressive and choose a big camshaft. Richard Rowe has been writing professionally since 2007, specializing in automotive topics. hole size 302 is 7/16 and 351 is 1/2 The GT40P cylinder heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. Can I run the new cam with the same roller hydraulic lifters or do I have to change the lifters too? The engine was only rated at 215 hp, but it at least had 9.0:1 compression. The multiple-layer steel construction allows the gasket to conform to movement between the cylinder head and block while maintaining a good seal. Many years ago, a friend bought a used 2001 Mercury Mountaineer 5.0L that was equipped with a set of really decent GT40P style iron heads. In less than an hour, we were ready to test. JavaScript is disabled. We did the installation at Holten's place of employment, Motorworks, in Longwood, Florida. Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! For this reason, we're not sure what kind of boost the GT-40P heads will give. A forum community dedicated to vintage Ford Mustang owners and enthusiasts. I got a GT40P off the assembly line years ago. Over $2050 for the 165/185 renegades. thats after 3 hours of idling/midrange hits to tune the idle and part throttle . This kind of improvement may not seem like much, but the owner of our test car, Jamie Holten, runs in FFW Trophy Stock where three-tenths is a lifetime. I ran the Speed Pro L2488 pistons and it had me around 9.9 compression with a .041 head gasket, Now I had GT40 heads milled .020 and so that's just a guess on the CC. The Fora platform includes forum software by XenForo. SB Ford GT40P Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. Yea. Their weak point is that the rotator used on the exhaust valve is very thick. the springs are new stock oem ford. The question was whether we wanted a torquey small-block or a more cammed-up rpm engine to boost peak horsepower. For a better experience, please enable JavaScript in your browser before proceeding. There are a couple of reasons for this suggestion. Smith began writing for Car Craft magazine in 1979 and became editor in 1984. Obviously, tuneups will vary. fuel injection system . When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Pride is built, in your garage, with your two hands. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Manual trans. Sponsored. Note the head bolt hole issue, some GT40 iron heads had 1/2 holes, if not they will need to be enlarged. No-option stripper- I like strippers. I plan on running a AFM b31 cam too which has relatively small duration for the intake valve. Long tube headers are a terrific idea, but you need to open up the exhaust side. Richard Holdener 240K subscribers Subscribe 63K views 1 year ago WESTECH PERFORMANCE GROUP LOW BUCK, GT40P 5.0L HEADS-CHEAP &. Going from your heads to the GT40p heads will bump your compression by about a point.so hello bottom end torque. The Fora platform includes forum software by XenForo. Install a set of 1.7:1 roller-tipped rocker arms on the heads. Mac and Ford Motorsport both make a GT40P spacific header. The GT40 heads are a bit more versatile, working with the 5.4 and 6.8, while the GT40P (Explorer/Mountaineer) heads will only work on the 6.8 due to an interference issue. Ive bought wrecking yard SBFs and put 20 lbs of boost to them and spin them to 7000 and made 500 HP with several of them. any input is apprecciated:smartass: Thank you for the info, if all I have to worry about is the plugs then I'm in good shape hahaha. They were located in Tahachapi CA, and were sold with upgraded springs for $650.00, back in 2002-2003 ish.
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