Performance & security by Cloudflare. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. The 2 heads are about the same when looking at the numbers with the GT40p heads having a slight edge. For a better experience, please enable JavaScript in your browser before proceeding. Those heads were unported and had stock valve sizes! will gt40p heads fit on a 302 | Ford Mustang Forum Can anyone give me a little feedback about a '99 Explorer 5.0, and tell me if it's my answer. The factory heads have a boss for the exhaust valve that restricts flow through the exhaust port. 99 Explorer engine (302) with GT40P heads - Ford Muscle Cars Tech Forum All this is worth it. You keep stock drivability, and stock gas milage if you can stay out of boost. If you wanted to make your engine feel strong, these would be a decent investment, but they will require some modifications. You can email the site owner to let them know you were blocked. Per a UEM tech support email I have the Icon IC736 is supposed to be good for GT40 heads when I asked about it. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. They were located in Tahachapi CA, and were sold with upgraded springs for $650.00, back in 2002-2003 ish. - I have a 1989 f150 with a 302 5 spd. Note the head bolt hole issue, some GT40 iron heads had 1/2 holes, if not they will need to be enlarged. Its always refreshing to see a FORD getting a little face time in your column, even if its a tired 302 with no great expectations of setting the world on fire when the dust settles. Took me 7 hours to do one head.but they cleaned up real nice. Install a used set of 5.0L Mustang "shorty" headers, generally available at auto swap meets for a reasonable price. I turned it because it was tired when I got it. This one added another 10 degrees of duration over the smaller Voodoo cam, along with 0.020 inch more intake valve lift. Junkyard Gt40p Heads-add 30+ Hp to Your 5.0l (For Free?) This is just a quick overview of the changes that need to be done. 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. Finally, we exchanged the Explorer's EFI manifold (which is a pretty good manifold in its own right) for an Edelbrock Performer RPM Air Gap intake and a Holley 750-cfm HP-style carburetor. GT-40 heads HP increase | Mustang Forums at StangNet 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. This test went so well that we were eager to see what the slightly bigger cam would do. The valve seats have been cut on a . We guarantee plenty of burnout action when you add GT-40P heads to your 5.0 Mustang. We also added a veteran Ford magnetic pickup distributor and used it to drive an MSD ignition system. As a final goal, we decided to bolt on a simple nitrous system and see if we could push this little small-block Ford to make some real power. 97% Positive Feedback . Using the manufacturer recommended springs for your camshaft are a safe bet. I recall having an absolute blast with my old K-code coupe back in the day. GT40 Heads On A 289? | Ford Muscle Cars Tech Forum For this reason, we're not sure what kind of boost the GT-40P heads will give. 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 K.S. Pretty sure that was name, but I could be wrong. (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. A mild porting with gasket matching will be very good. at the crank. How to Build a Cheap Drag Racing 302 Ford Motor | It Still Runs The GT40P cylinder heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. Someone does make the Tri-Y's headers for the early Mustangs using the "P" heads. As you might expect with more duration, the idle quality dropped significantly but was still able to make 11.5 inches of vacuum at 980 rpm. I got rid of the carburetor and went with a F.A.S.T. Stock heads with a fresh 3-angle valve job, shorty headers, T5, 4.10s, stock Explorer intake and stock '88 GT short block with 140,000 miles on it and an E cam in it. Stock valve sizes? Sponsored. Works on all factory cast iron E7, GT40, and GT40P cylinder heads! Late-model ford GT40 and GT40P heads with 1.84-inch intake valves will also flow 185 cfm at 0.50 . Instructions on porting the GT-40p heads here. Joined: Sun Mar 15, 2009 9:31 am. If you go with a diffrent cam, make sure you change springs, The Trick Flow kit comes with everything for around $130. Plus you will need to drill all the head bolt holes out as the 351W uses larger head bolts. I added a link to it. Purchase any used aftermarket manifold for the 302 that is designed to function in the 3,500 to 6,500 power band. The 302 uses smaller 7/16" head bolts and your "P" heads may or may not require the step washers. $700.98. Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - GT40P heads? The car weighs #2835 with driver. Choosing pistons to complement GT40P heads - MustangWorks.com Joined . Do not ever, ever think about using the tube type manifolds. $169.50. The Fora platform includes forum software by XenForo. You can have your current 28 oz rebalanced to 50. With the GT-40P heads you will need to back off the timing a couple degrees and bump up the fuel pressure. That's an improvement of 22 hp over Test 2. Anythoughts? I would like to know what heads, cam and intake manifold combination to use for the most HP I can squeeze out of that motor. 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. You'll have to plug the oil hole that is in the engine from the old oil dipstick. this head is complete with new 1.837 int valves and 1.536 exhaust valves. This is what I recommend to everyone who is doing a budget 5.0 build. This is the main reason why these engines are not modified as much as the small block Chevy. Not sure about that but got some pictures of the cast iron explorer manifolds on a 302. They also have emissions legal heads as well. Calculating pushrod length 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. The GT40 & GT40P heads had a few differences that are note-worthy, the most importantly being the bump in compression. 950.00 us a set and will ship . That's fantastic for the minimal investment we made. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. Within a few hours of his discovery, the engine was sitting in the back of his truck on its way to a new home. However realistically, with the amount of money spent modifying the gt40p heads or even those older 289 & 351w heads, you could have even better performing aluminum heads. The MPH was there to run a little better but the local track is about terrible. Yes- thank you. 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. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. The Fora platform includes forum software by XenForo. If this is beyond your technical ability, you could ask a local machine shop to perform the modifications. You didnt provide a lot of information about the engine itself, Im assuming its 85 or newer ( roller cam) May need a freshen up of the bottom end if compression is the issue. 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. OR you could put your automotive journalistic skills in motion by reporting on the many new modern components available for the latest generation 351 Cleveland. 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. You can have your current 28 oz rebalanced to 50. You might even say its like flogging a dead horse without any animals actually being injured during my moments of sarcasm. Assorted screwdrivers, pliers and vise-grips. The SUV indicated barely 120,000 on the clock, and after yanking the valve covers to judge the engine's condition, Tim Moore instantly made the decision to do the boneyard version of a smash-and-grab. 351W with GT40P heads? | Mercury Cougar Owners Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. All manufactured using advanced CNC technology for the extreme durability and precision required of the modern canted valve Ford Small Block at power levels around the 1000 mark reached during recent competitions at the EMC and at the strip. Its funny no one mentioned anything about ignition timing or components, Your email address will not be published. how much HP and torque? We need a build on a 400+ hp 302/6 build. 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 . For all of us interested in Gt40p heads. You can use the stock roller lifters with any size cam you want. Yea. Im running stock GT40 heads with stock 4.000 bore on cylinders and a Lunati cam with 256/262; Duration @ .050 (Int/Exh): 213/219; Gross Valve Lift (Int/Exh): .483/.499; LSA/ICL: 112/108. Where they differ is the combustion chamber size. Once the headers are in place, then you can consider if you still want more power. If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. However, when we dyno'd the car before installing the GT-40P heads, the fan was on the car. Here a comparison of different heads on a 302: I'm very happy with my GT40P. You can find them on later model Mercury Mountaineers and several other Ford SUV applications. Thank You. Here is my setup. Its NA but makes use of AFR heads and some other aftermarket goodies. I guess someone could just do a basic valve job and throw on the GT40 upper/lower intake for a cheap HP boost. While we've seen engine dyno tests performed with GT-40P heads replacing factory E7TE castings and resulting in a boost of more than 25 hp, we have reluctantly set our horsepower gain goal at 25 ponies, as well. The GTp heads are like GT 40's with smaller combustion chambers and the spark plugs are relocated for a more efficient burn. However I think the opportunity window is slowly closing. Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more! Build Thread 1965 Fastback Project "Racesteed". There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. I spin it to 6500 and thats about it. Mar 23, 2004. Not looking for crazy HP. Over $2050 for the 165/185 renegades. 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. FORD, SMALL BLOCK 302 HO w/ E7, GT40P & GT40 - Alex's Parts built one using a 91' HO short block with a set of AFR 165 heads, Weiand . I love my setup and it is very strong engine. I'm running stock GT40 heads with stock 4.000 bore on cylinders and a Lunati cam with 256/262; Duration @ .050 (Int/Exh): 213/219; Gross Valve Lift (Int/Exh): .483/.499; LSA/ICL: 112/108. We've already been motivated to put this engine in a buddy's Mustang. These are a great head but do need some machining mods to make they really work well. For the first test, we were reusing the stock Explorer cam, so the engine didn't need any break-in time. We will go into more detail on the head mods in a later story in Junkyard Builder, so watch for it. 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. Well assume it is a 5.0L with stock heads. Location: Re: Stock Ford 351W 4bbl dyno numbers. Holley 670 street avenger carb. Depending on the Headers you have you might be okay. Early Windsors tend to have fairly restrictive exhaust manifolds, making the addition of a set of headers that much more efficient. As noted, this is looking like hes building a 351 Lightning truck motor, which is a good way to go. The heads got a 3 angle valve job, new valves from speed-pro and all the valve train was from crane that matched the current hydraulic cam. What did the heads flow? It turned out we were conservative on both counts. Learn how your comment data is processed. Test 3: Installed the larger Lunati camagain, no other changes. timing and compression ratio with gt40p heads - Modded Mustang Forums GT40P heads? how hard to put on? how much HP and torque? K.S. A bit of info for those looking to build 300+hp 5.0L/302s They almost seem like flywheel numbers rather than RWHP numbers. i'd love to use these heads,. GT40P heads, what kind of performance do they give? Ford 302W / 5.0L History & Specifications - The Ranger Station This is not a criticism but instead consider it to be more of a heads-up. Mild Build Gt40p 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! Without changing the stock pistons. The Fora platform includes forum software by XenForo. 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. 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. What Cam and Springs to Use for GT40 Heads If there isnt room without disassembling half the front clip on the car, then it might be easier to remove the engine and do the conversion that way. In a lightweight Fox or early Mustang with a five-speed behind it, this would be a great little street engine. The headers will improve this airflow throughout the entire rpm rangeadding more torque and horsepower. Both swaps made more sense when parts were readily available at the bone yard for cheap. A solid 300-325 hp should be plenty and that's with good drivability and reliability as well. As usual, there is much more to this story. Every thing he tells you on this site is true. The tube headers showed a gain of almost 100 hp! Speedmaster PCE281.2046 Small Block Ford Aluminum Cylinder Heads 62cc HiPo manifolds and Ill be good. Well also assume that this engine is running stock exhaust manifolds. We turned to Rare Auto Design in Orlando for dyno tests to find out how much horsepower we gained. Richard Rowe has been writing professionally since 2007, specializing in automotive topics. I had a set of 69 302 heads I ran for a while . I need that part number too! Compare. Best of all, no machining is required to install these on your stock cast iron heads! I think one of the finer traits of a true car guy, is the patience to put a prized car away and just let it sit for a while rather than selling it when life gets in the way. I have a 432 HP non Hi Po 289 I built. After a couple grand you have a killer set of heads, but there's got to be a less-expensive way of making horsepower. Upgrading Fox Body Cylinder Heads - AmericanMuscle.com 68 XR7 & 68 M-100. Ive been building ENGINES for 40+ years. Not *as* good as the GT40p heads, but I'd prefer to not have to worry about exhaust fitment issues, or have a narrow range of what I can work with. Click to reveal But don't think that adding a bigger camshaft will make more power. The GT40P heads flow a lot better than stock 351 heads. After graduating from Iowa State University with a journalism degree in 1978, he combined his two passions: cars and writing. Compare. Gt40 heads/intake from a jy explorer, leave the . many thanks to all you eco-hippies giving me dirty looks and helping me feel llike an overall badass rebel. how hard to put on? Be careful, I was once bitten by one of those reptile engine builders. Different years can have different combustion chamber sizes but ffor the most part there will be no performance increases by going with 302 heads. Do you guys have part numbers for the spring kits? So . Save narve00 In a 3,250-pound car like a Mustang with 3.50 gears and an automatic with a 2,800-rpm converter, this 5.0L could pull 12.80s at 108 mph. 68 Mustang GT/CS Highland Green, PS, PB & Console, C Code w/C4 & 3.55 8 rear, If you aren't using the GT40P's stock, with maybe a spring upgrade and valve job, they aren't worth it anymore. 1996-2001 Ford Explorer 5.0L V8 Specifications GT40, GT40P, would be great factory heads. The older pushrod engines just dont offer the same kind of power potential for their displacement and it all has to do with cylinder head flow. JavaScript is disabled. 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. I must agree with Jeff Smith. '85 GT vert two tone (white on charcoal)white leather, http://www.facebook.com/groups/233213650060739/, http://www.summitracing.com/parts/TFS-2500100/, ascMcLaren & Motorsport/Grand Prix IV Capris, RHD and Other International/Export Models, Mods, Maintenance & Mechanical FAQs/Archive, If this is your first visit, be sure to
never messed with the timing, its at 35* total . For a better experience, please enable JavaScript in your browser before proceeding. If you're not a header kind of guy, the repro 289 HIPO manifolds bolt up to the GT40P heads with plenty of spark plug room. With gt40p heads and 289 hipo exhaust manifolds changing sparkplugs is the same as the original 302 heads and manifolds, I use the spark plugs that are recomended for the explorer with gt40p heads and you can use straight or angled boots. Smith began writing for Car Craft magazine in 1979 and became editor in 1984. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. I wouldnt recommend reusing lifters though. Is asking advice for a fairly common situation involving parts with mandatory compatibility between the two for performance and longevity. 1983 Mustang G.T. The spark plug issue is almost a non-issue. 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. This will follow the guideline of a 1.6 rocker baseline and factory bottom end 79-95 related 5.0L Mustangs only. BONUS TEST-FOUR DIFFERENT 302 INTAKES.. The question was whether we wanted a torquey small-block or a more cammed-up rpm engine to boost peak horsepower. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. Vehicle: 1972 2 door 302 maverick, 1986 5.0 stang gt convertible,66 mustang coupe, HEMI ram. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. The Edelbrock Performer RPM is a good choice, but Holley, Weiand and Ford Motorsport also have similar offerings. You'll also have to use your 289 timing chain cover since it has a hole for the oil dip stick and fuel pump. If you can find individual flanged headers like the obsolete MAC headers had, those worked really well with GT40P's. Holten runs the factory fan, but he had removed it when he ran the 12.63. Let us explain. GT 500; Posts: 8496; Location: Brisbane . GT40Ps have 58cc. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. Anyways, I know the gt40ps will bump . These engines came with the GT40P head, which even with its small valves, offers really good performance. +1 I would go with the regular GT40 heads. Because of this, your tuneup will probably need to be modified. Your IP: When compared to the new generation of performance engines on the market today like the 5.0L DOHC Coyote engine, your engine will not come close. Because of this, your tuneup will probably need to be modified. Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! Going from your heads to the GT40p heads will bump your compression by about a point.so hello bottom end torque. How to Get More Horsepower Out of a Ford 289 | It Still Runs Install a Ford Motorsport E303, X303 or F303 cam, or any of the similar units from Indy, Lunati or your favorite manufacturer. Mac and Ford Motorsport both make a GT40P spacific header. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. Jeff Smith: It would have been better to know a little bit more about your combination, but the short answer is yeswith a hydraulic roller camshaft, assuming the lifters are in good shape and the roller wheels show no unusual wear, they can be re-used on a new cam with no danger of adverse effects. 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. There are caveats to this plan, however. . Seriously though if you're not planning on an all-out attack for HP, I'd consider a forged piston out of Probe's SRS line-up. SB Ford GT40 Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. I'm sure the dyno operator used some goofball correction factor to make the numbers look higher. In less than an hour, we were ready to test. 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. 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. 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.