The factory heads have a boss for the exhaust valve that restricts flow through the exhaust port. Smith began writing for Car Craft magazine in 1979 and became editor in 1984. This 1979-1995 Mustang cylinder head and camshaft guide will overview the heads and cams we offer and how they will coincide. On the power side, we selected 400 hp as an impressive but reasonable output for our small-block 5.0L Ford. When building an engine there is a lot to take into consideration. . The only way to really make more power is to go with a stroker kit, blower and/or heads. Sponsored. Ha! The reply has so many assumptions that I cant even assume to know the answer. Also, you'll need to get a steel distributor gear to replace the iron gear that is currently on your distributor. I have managed to get 402 horse power from a 289 hipo natural aspirated. E303 Cam advanced 4 degrees. Thanks. The reason for this is that we're actually replacing mildly worked E7TE heads. They also have emissions legal heads as well. That's more than enough to feed a power-brake booster. 1979 Indy 500 Pace Car. If you're going to use the stock 289 heads, install 1.84-inch intake valves, then port the intake and exhaust; these mods will net you about 185 cfm of intake port flow at 0.50 lift. 1986 Short block with notched pistons. how hard to put on? 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 . Do not ever, ever think about using the tube type manifolds. For this reason, we're not sure what kind of boost the GT-40P heads will give. I'm sure the dyno operator used some goofball correction factor to make the numbers look higher. Depending on the Headers you have you might be okay. Required fields are marked *. I have a 432 HP non Hi Po 289 I built. I'm wondering how these heads will interact with the paxton 1220 sl supercharger I'm trying to put on. In mid-1997, the Explorer and Mountaineer 5.0 L heads were revised and renamed . Not bad for off the shelf parts and a stock shortblock. A forum community dedicated to vintage Ford Mustang owners and enthusiasts. These are Ford iron GT-40P heads. Keywords 97% Positive Feedback . I have to agree, the GT40P heads flow better than the GT40 iron heads. I wouldnt recommend reusing lifters though. The Fora platform includes forum software by XenForo. Just make sure it is a roller cam. . Compare. Similar to regular GT-40 heads, the biggest difference between the two is that the P-heads feature a revised spark plug angle which extends the plug into the combustion chamber, putting the flame front close to the absolute center of the chamber, resulting in a smoother combustion process. I had a set of 69 302 heads I ran for a while . Here is my setup. There are caveats to this plan, however. #1:::Throw out all your Magazines that suggest what to do! could the gear of off the oil pump drive(i know they're DIS), for the explorer motor be used on his dizzy? This is just a quick overview of the changes that need to be done. I can tell you that with my 9.503 block, 22cc dished pistons and 64cc heads, I'm at 9.5:1 compression. With the GT-40P heads you will need to back off the timing a couple degrees and bump up the fuel pressure. If this is beyond your technical ability, you could ask a local machine shop to perform the modifications. This time around, we chose a shining example of this junkyard art form. We also discovered some issues with the GT40P heads that required changes, so we added valves from Manley that eliminated the exhaust-valve rotators and allowed us to set the proper valvespring installed height. ported GT-40p, ported cobra intake, 65mm BBK, e-cam with 1.7s, longtubes, off-road x-pipe with flowmasters dumped. An aggressive cam will wake it up a bit. that is a healthy budget deal. After we installed the heads and with the fan off, he ran a 12.46 at 107.9. You can have your current 28 oz rebalanced to 50. JUNKYARD GT40P HEADS-ADD 30+ HP TO YOUR 5.0L (FOR FREE?) Can I run the new cam with the same roller hydraulic lifters or do I have to change the lifters too? Application Fits 1979-95 Mustang 302/351 w/ OEM Small Block Ford Heads However I think the opportunity window is slowly closing. You'll have to plug the oil hole that is in the engine from the old oil dipstick. For additional insurance, we also added a set of ARP head studs, which are stronger and offer better thread overlap than factory bolts, which helps prevent pulling threads out of a used block. 1.7 shaft rockers and beehives. '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 As noted, this is looking like hes building a 351 Lightning truck motor, which is a good way to go. It's an 86 roller 5.0 engine that had a recent rebuild sometime in the past with keith black pistons, otherwise stock. The rest went very smoothly, and we reused the stock lifters and suffered no ulcers worrying about breaking in the cam. Hey all, I'm working on building a 302 with my gt40p heads. That's a good combo in my book. Test 3: Installed the larger Lunati camagain, no other changes. On slicks the car went some low 7.70s right at 90mph. You gave me the info I was looking for, and I really do appreciate it. 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. 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. First, adding headers will improve power on the existing combination. The Fora platform includes forum software by XenForo. Install a Ford Motorsport E303, X303 or F303 cam, or any of the similar units from Indy, Lunati or your favorite manufacturer. We did the installation at Holten's place of employment, Motorworks, in Longwood, Florida. $139.99. Eldelbrocks Air Gap intake manifold should work well with the combination. GT 500; Posts: 8496; Location: Brisbane . Never not once have I ever seen a SBF rod bolt create a failure. 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? I love my setup and it is very strong engine. The MPH was there to run a little better but the local track is about terrible. Its funny no one mentioned anything about ignition timing or components, Your email address will not be published. check out the. I got a set of AFR heads , night and day. This will keep you from dropping your overall static compression ratio and losing power. Even with relatively small valve sizes of 1.85-inch intake and 1.46-inch exhaust, the P-heads flow much better than previous. 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. Do you guys have part numbers for the spring kits? It turned out we were conservative on both counts. i'd love to use these heads,. If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. FULL DYNO RESULTS. 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. JavaScript is disabled. made more power everytwhere and 40 hp is respectable. 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. We gained 45 hp and 40 lb-ft of torque. However, theres a distinct possibility that I might pull all of my hair out if I see another in-depth article explaining how I, along with just over a billion other desperate humans seeking answers, need special valve spring split locks for my next tired Chevy build. Even with a stock Mustang 5.0 cam makes good power. 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. bmcdaniel, Feb 17, 2004 #7. v8maverick Member. Cloudflare Ray ID: 7a2e2d95dedea1e4 I got lucky and found a complete Explorer GT40P engine online. Beyond the engine's amazingly good appearance, Moore had a couple of good reasons for choosing this engine. We know what you're thinking--only two-tenths from an extra 45 hp? The later model distributors had a different diameter shaft than the earlier ones. Without changing the stock pistons. Posted on May 07, 2014 by promarengine. 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. K.S. Where they differ is the combustion chamber size. Late-model ford GT40 and GT40P heads with 1.84-inch intake valves will also flow 185 cfm at 0.50 . Someone does make the Tri-Y's headers for the early Mustangs using the "P" heads. Some ideas never go out of style. Location: Re: Stock Ford 351W 4bbl dyno numbers. But the part about a cam replacement possibly being a labor intensive undertaking is correct. I just read about this build on the corral.net. (Image/Harrison Creamery). That carbureted GT40P motor made 465 on th engine dyno with a .500" 239/244 camshaft, Holley 650 carb and Weiand Stealth intake. The Fora platform includes forum software by XenForo. I had those on my car before I upgraded and they were nice heads. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. I have a 66 mustang with its original untouched 289 with over 140 k on it that Ive been running a blow thru turbo making 14 lbs of boost on for the last 5 years and its never given me a problem. All this is worth it. I've not seen a set of longtubes that have an issue with GT40P's, either. After a couple grand you have a killer set of heads, but there's got to be a less-expensive way of making horsepower. (its not their engine) There are literally a dozen or so camshaft companies that offer a mild hydraulic roller cam for a 5.0L Ford. SB Ford, GT40 .575" Lift Max Output II Drop in Valve Spring Kit, Hyd Roller, 140 Lb Seat. http://vb.foureyedpride.com/showthread.php?t=89153, http://www.facebook.com/groups/233213650060739/, 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 Small-block Fords and Mopars only use four head bolts per cylinder, so retaining proper head-gasket sealespecially with nitrousis a point that demands attention, so we ordered a set of Fel-Pro MLS head gaskets rather than a standard, composition gasket. I view the GT40P heads similar to Granada brakes. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. With nitrous, this is easily a mid-11-second ride. Step 1. Here is the lowdown on exhaust manifolds and VALVE SPRINGS. Holten runs the factory fan, but he had removed it when he ran the 12.63. 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 SBF OEM | eBay Motors, Parts & Accessories, Car & Truck Parts & Accessories | eBay! 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. 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. . 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. HiPo manifolds and Ill be good. The newer camshaft is designed for use with a soft bronze distributor gear, not the hardened steel gear used for older camshafts. You can have your current 28 oz rebalanced to 50. Going from your heads to the GT40p heads will bump your compression by about a point.so hello bottom end torque. In less than an hour, we were ready to test. The GT40P heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. I got lucky and found a complete Explorer GT40P engine online. 02-11-2012, 07:16 PM #6 fiveoh 86lx Dennis Hilliard of Central Coast says we can expect to gain three-tenths in the quarter-mile. After graduating from Iowa State University with a journalism degree in 1978, he combined his two passions: cars and writing. With the engine reassembled, we boxed up our second camshaft and headed for Westech's dyno. However, when we dyno'd the car before installing the GT-40P heads, the fan was on the car. A mild porting with gasket matching will be very good. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. 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. We need a build on a 400+ hp 302/6 build. 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). Purchase any used aftermarket manifold for the 302 that is designed to function in the 3,500 to 6,500 power band. 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. Really hurt too. this is the price for one head. I bought a crate 302 from Downs Ford a few years ago that was producing 320 hp. Its NA but makes use of AFR heads and some other aftermarket goodies. There are a lot of variables that must be addressed to give a better estimate, but a good basic estimate is 20-40 HP at the crank. If you have a early 351W ie pre 76 it probably . For 2018, the Coyote makes 460 hp. 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 car weighs #2835 with driver. the springs are new stock oem ford. The heads also required some machine work, including screw-in studs, guideplates, and widening the spring pockets for bigger valvesprings. fuel injection system . check out the. These are some of the pictures I have showing the Explorer manifolds. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. Vehicle: 1972 2 door 302 maverick, 1986 5.0 stang gt convertible,66 mustang coupe, HEMI ram. Choose a cylinder head before you install the pistons. He'll have to get a gear for his distributor. We turned to Rare Auto Design in Orlando for dyno tests to find out how much horsepower we gained. Gt40 heads/intake from a jy explorer, leave the . Definitely going to use my P 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. I need that part number too! fordfan289, Aug 27, 2011 Assuming the above configurationa pushrod 5.0L will potentially make between 250 and 260 hp. I have a 302 Windsor V8 EFI engine that I converted to a 600 cfm carburetor with a Street Warrior intake manifold. 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. The GT40P heads flow a lot better than stock 351 heads. Along with the heads, we used MAC headers for GT-40P heads. Just got through porting one of my gt40p heads today. I don't need tons of power to enjoy the car. Richard Holdener 240K subscribers Subscribe 63K views 1 year ago WESTECH PERFORMANCE GROUP LOW BUCK, GT40P 5.0L HEADS-CHEAP &. A COMP hydraulic roller cam we found works well with this combination. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more! The action you just performed triggered the security solution. Ported Hurricane Single Plane and custom 750 HP. Adding the headers may also require a slight increase in secondary (and possibly primary) jetting to ensure the proper air-fuel ratio, but thats also an easy tuning change.
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