GT40Ps have 58cc. All costing in the end at least another $2k. Shop by category. Add 40 to 70 HP to your 302 yourself - Factory Five Racing Forum The gt40p head is considered the best OEM 302 head made. Holten's best time is a 12.63 at 105.9 mph, and if we gain the desired result he will be right in the thick of things in Trophy Stock competition. I got a set of AFR heads , night and day. When combined with modern power-makers, such as nitrous, the 302 is more than capable of producing 400+ horsepower for little more than the cost of a stock engine rebuild. Took me 7 hours to do one head.but they cleaned up real nice. 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. Dec 8, 2011. Stock 93-95 Cobra shortblock (stock cobra cam), GT40X heads, 1.7 rockers, Edelbrock Performer RPM intake, Holley 650, and longtube headers. On slicks the car went some low 7.70s right at 90mph. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. 950.00 us a set and will ship . The multiple-layer steel construction allows the gasket to conform to movement between the cylinder head and block while maintaining a good seal. JUNKYARD GT40P HEADS-ADD 30+ HP TO YOUR 5.0L (FOR FREE?) In a lightweight Fox or early Mustang with a five-speed behind it, this would be a great little street engine. And remember ENGINES have been being built/rebuilt/modified for years. 1983 Mustang G.T. They are more expensive than standard head gaskets, but they also do the job and are worth the additional money. Can anyone give me a little feedback about a '99 Explorer 5.0, and tell me if it's my answer. The hardest part of swapping the cam was just getting the timing cover off and back on again. bmcdaniel, Feb 17, 2004 #7. v8maverick Member. Its NA but makes use of AFR heads and some other aftermarket goodies. AFR 165cc 58cc Heads. Pretty sure that was name, but I could be wrong. 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. GT40p heads peak horsepower was [email protected] with 363ft/[email protected] The worked 351 heads showed peak . PTP Engineering front suspension and 25540R17s all around. After a couple grand you have a killer set of heads, but there's got to be a less-expensive way of making horsepower. 331/347 stroker w/gt40p's, waste?Hp?cost involved? - Maverick Install a set of 1.7:1 roller-tipped rocker arms on the heads. Sponsored. A bit of info for those looking to build 300+hp 5.0L/302s document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. We probably could have coaxed an even 300 hp out of this stock configuration, but with such good numbers, we decided to jump right into the first Lunati cam. Mar 23, 2004. 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 Yep my **** is coming apart again Isnt life great! Even with a stock Mustang 5.0 cam makes good power. I may do some port matching and a little cleanup, otherwise just a set of springs and cam and see what I have. Manual trans. Install a Ford Motorsport E303, X303 or F303 cam, or any of the similar units from Indy, Lunati or your favorite manufacturer. That carbureted GT40P motor made 465 on th engine dyno with a .500" 239/244 camshaft, Holley 650 carb and Weiand Stealth intake. The GT40P heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. K.S. While the heads were off getting a massage, we turned our attention to the cam timing. Note the head bolt hole issue, some GT40 iron heads had 1/2 holes, if not they will need to be enlarged. Install a set of GT-40P cylinder heads from a late 1990's Ford Explorer or a set of GT40 heads from an early 1990's Mustang 5.0L. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. The 2 heads are about the same when looking at the numbers with the GT40p heads having a slight edge. Test 3: Installed the larger Lunati camagain, no other changes. The reason for this is that we're actually replacing mildly worked E7TE heads. E303 Cam advanced 4 degrees. They were located in Tahachapi CA, and were sold with upgraded springs for $650.00, back in 2002-2003 ish. They fill that spot between power and budget. Stock valve sizes? This is what I recommend to everyone who is doing a budget 5.0 build. Mustang Cylinder Head & Camshaft Guide (79-95) - LMR This combination should be good for about 400 horsepower and as much as 500 if you opt to use the stronger aftermarket pistons. K.S. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. Click to reveal That's fantastic for the minimal investment we made. Also, the spark plug angle makes it a pain. Once you get into the FoMoCo aftermarket aluminum GT40s though, all bets are off. You need to check. We decided on a Powerstar kit from Nitrous Supply, owned by our good friend Mike Thermos, who was one of the original nitrous kit suppliers back in the early '80s. Gt40/gt40p Heads On A 351w Questions - StangNet As usual, there is much more to this story. What did the heads flow? Not looking for crazy HP. He'd be the best source. We did the installation at Holten's place of employment, Motorworks, in Longwood, Florida. Even with relatively small valve sizes of 1.85-inch intake and 1.46-inch exhaust, the P-heads flow much better than previous. . This one added another 10 degrees of duration over the smaller Voodoo cam, along with 0.020 inch more intake valve lift. 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. Worst AFR 165 dyno ever | Factory Five Racing Forum Free shipping for many products! Mild Build Gt40p Theres many options available for a little more power. You can email the site owner to let them know you were blocked. Beyond the engine's amazingly good appearance, Moore had a couple of good reasons for choosing this engine. 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. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. GT40P heads, 302 and Victor Jr. intake: - Factory Five Racing Forum 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. Part of this reason is due to its inherent strength and simplicity, but a lot of it has to do with how little Ford has changed it over the years. Performance & security by Cloudflare. Gt40p heads - FourEyedPride.com We also added a veteran Ford magnetic pickup distributor and used it to drive an MSD ignition system. Install a set of GT-40P cylinder heads from a late 1990's Ford Explorer or a set of GT40 heads from an early 1990's Mustang 5.0L. Works on all factory cast iron E7, GT40, and GT40P cylinder heads! As noted, this is looking like hes building a 351 Lightning truck motor, which is a good way to go. 1983 Mustang G.T. 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. 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. Thanks for the help, I was planning on puttingin roller rockers or at least new springs, and that engine looks great, hoppfully mine will look at least similar to that one of these days. The heads that were used were also old C8 casting with 58cc chambers. HAD '82 GT monochromatic (red).black cloth HAVE thats after 3 hours of idling/midrange hits to tune the idle and part throttle . Would have liked to see a comparison done on the same short block using a set of decently-ported early non-Thermactor iron heads Tracy Blackford, 65 Mustang FB, 331 built with 289 H beam rods and 383W piston, 282S cam, self ported '70 351w heads, Dougs Tri-Y headers. Well that article just got me very ancy, I want these heads!! Yes- thank you. Skip to main content. Instructions on porting the GT-40p heads here. That's an improvement of 22 hp over Test 2. The tube headers showed a gain of almost 100 hp! LOW-BUCK 302 FORD HEAD UPGRADE Richard Holdener 239K subscribers 189K views 2 years ago WESTECH PERFORMANCE GROUP WHAT'S IT WORTH? GT40, GT40P, would be great factory heads. 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). at the crank. You'll have to plug the oil hole that is in the engine from the old oil dipstick. What Cam and Springs to Use for GT40 Heads Not bad for off the shelf parts and a stock shortblock. 402 HP NA from a HI PO 289 isnt that mysterious of a feat to accomplish with todays SBF Aftermarket parts availability. 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. This website is using a security service to protect itself from online attacks. Like I said lots of options. GT40 Heads On A 289? | Ford Muscle Cars Tech Forum Ported Hurricane Single Plane and custom 750 HP. First, adding headers will improve power on the existing combination. Anythoughts? $139.99. 1996-2001 Ford Explorer 5.0L V8 Specifications 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. 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 . 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. Advanced: Daily Deals; Help & Contact; Sell; My eBay Expand My . 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. Let us explain. For a better experience, please enable JavaScript in your browser before proceeding. Ford Explorer Mountaineer 5.0 Ohv Iron 302 Sbf And have discovered something that I dont think anyone else knows. Then why did you port the heads and how do you know if you made an improvement. Nice to see actual dyno results instead of "butt dyno" guesses. 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. Free shipping. Purchase a set of flat top pistons (from Ford Motorsport, TRW or Keith Black) with machined valve reliefs and designed to provide 10:1 compression with a 59 to 60 cc combustion chamber cylinder head. 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. Motor is going into a Ranger. made more power everytwhere and 40 hp is respectable. 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 Nudge us with emails, and we'll make it happen. There was an article in Hot Rod magazine in the mid '80's where Jon Kaase was developing 351w packages. Anyways, I know the gt40ps will bump . I can tell you that with my 9.503 block, 22cc dished pistons and 64cc heads, I'm at 9.5:1 compression. So . Test 1: 750-cfm carburetor, dual-plane intake manifold, and stock camshaft. 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. Ill do springs and a moderate cam and go for a good, dependable power plant. Ive been building ENGINES for 40+ years. Yea. JavaScript is disabled. Compare. For 2018, the Coyote makes 460 hp. Runs well. If you know him, ask him. Limited header choice is certainly a challenge. Not when you can buy a set of Promaxx or AFR Enforcer heads for $1000, that already have decent hardware included. Best of all, no machining is required to install these on your stock cast iron heads! 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. Most all long tubes come out far enough to clear and other short tube headers will work but there is clearance issues on two of the cylinders. Not sure about that but got some pictures of the cast iron explorer manifolds on a 302. gt40p headers | Maverick/Comet Forums 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. Commonly referred to as Explorer heads, GT-40P iron castings are found on current 5.0-equipped Explorers. The GT40P heads flow a lot better than stock 351 heads. Definitely going to use my P heads. We know what you're thinking--only two-tenths from an extra 45 hp? 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. With the GT-40P heads you will need to back off the timing a couple degrees and bump up the fuel pressure. A good port job can set you back another $500-$1,000. In addition, the cam timing was designed for torque, with duration somewhere around 190 degrees at 0.050 with roughly 0.450-inch lift. The entire front accessory drive and timing chain cover must be removed, along with the distributor and intake manifold.