bmcdaniel, Feb 17, 2004 #7. v8maverick Member. Im new and Im currently building a 302 on a budget and want to raise compression without milling heads but by pistons and I want to get close to 10:1. We guarantee plenty of burnout action when you add GT-40P heads to your 5.0 Mustang. I've not seen a set of longtubes that have an issue with GT40P's, either. Really hurt too. I love my setup and it is very strong engine. The Fora platform includes forum software by XenForo. There are literally a dozen or so camshaft companies that offer a mild hydraulic roller cam for a 5.0L Ford. Do not ever, ever think about using the tube type manifolds. GT40p heads peak horsepower was [email protected] with 363ft/[email protected] The worked 351 heads showed peak . Mar 23, 2004. This is not a criticism but instead consider it to be more of a heads-up. The only one that's close, is #7. As usual, there is much more to this story. 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. I must agree with Jeff Smith. Yeah, except those. a) ain't early and b) aren't 289 heads. A forum community dedicated to Ford Mustang owners and enthusiasts. 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. AFR 165 Heads | Have options for pedestal mounted rocker arms or stud mounted rocker arms. Obviously, tuneups will vary. A forum community dedicated to Ford Mustang owners and enthusiasts. Related Resources Mustang Generation Nicknames: What Do They Mean? The factory heads have a boss for the exhaust valve that restricts flow through the exhaust port. could the gear of off the oil pump drive(i know they're DIS), for the explorer motor be used on his dizzy? 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. That's a 40 per cent increase in power from a simple head and cam swap, and one seriously happy Mustang owner! Thanks. 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. Start with any 302 block, but try to find one from 1985 and up since it will already have provisions for a roller camshaft. Sponsored. 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. 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. He'd be the best source. This is a function of the somewhat wider lobe-separation angle of 112 degrees. This 1979-1995 Mustang cylinder head and camshaft guide will overview the heads and cams we offer and how they will coincide. Like I said lots of options. 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? *** 65 Mustang 351C 4v, AOD, 4.11 gears *** 66 Galaxie convert big block. that is a healthy budget deal. Runs well. Not sure about that but got some pictures of the cast iron explorer manifolds on a 302. This time around, we chose a shining example of this junkyard art form. - I have a 1989 f150 with a 302 5 spd. 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. 1979 Indy 500 Pace Car. The GT40 & GT40P heads had a few differences that are note-worthy, the most importantly being the bump in compression. The Fora platform includes forum software by XenForo. We need a build on a 400+ hp 302/6 build. Consider having the head's intake ports matched to the intake manifold gasket. I guess someone could just do a basic valve job and throw on the GT40 upper/lower intake for a cheap HP boost. $169.50. 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. Ford's seminal 302 engine (later re-dubbed the 5.0) has been popular with budget-minded hot rodders for decades. I plan on running a AFM b31 cam too which has relatively small duration for the intake valve. Your email address will not be published. However, since Holten's car has an E303 cam, we didn't want the pistons and valves becoming too close, so we chose the 1.6 rockers. Gt40 heads/intake from a jy explorer, leave the . Over $2050 for the 165/185 renegades. The tube headers showed a gain of almost 100 hp! Well also assume that this engine is running stock exhaust manifolds. Holten tells us removing the fan is worth two-tenths in itself, which tells us the fan soaks up roughly 20 hp. SB Ford GT40P Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. Depends on the budget. Where they differ is the combustion chamber size. Central Coast Mustang sells GT-40P heads at a great price, making them a viable alternative in a market flooded with performance head choices. GT 500; Posts: 8496; Location: Brisbane . JavaScript is disabled. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. 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. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. LOW-BUCK 302 FORD HEAD UPGRADE Richard Holdener 239K subscribers 189K views 2 years ago WESTECH PERFORMANCE GROUP WHAT'S IT WORTH? If you go with a diffrent cam, make sure you change springs, The Trick Flow kit comes with everything for around $130. These are some of the pictures I have showing the Explorer manifolds. No-option stripper- I like strippers. 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. +1 I would go with the regular GT40 heads. Do you guys have part numbers for the spring kits? I'm also have the regular GT40 heads on my current build. This website is using a security service to protect itself from online attacks. I got a GT40P off the assembly line years ago. Using the manufacturer recommended springs for your camshaft are a safe bet. Free shipping. Never not once have I ever seen a SBF rod bolt create a failure. hole size 302 is 7/16 and 351 is 1/2 As with all head installations, check piston-to-valve clearance before final startup. i have a 302 engine from a 1977 granada and i am wondering if gt40p heads from an explorer will fit on this motor. Step 1. Holten runs the factory fan, but he had removed it when he ran the 12.63. The cost of a new set of standard replacement roller lifters is very affordable at major retailers like Summit. In less than an hour, we were ready to test. JavaScript is disabled. That carbureted GT40P motor made 465 on th engine dyno with a .500" 239/244 camshaft, Holley 650 carb and Weiand Stealth intake. 1986 Short block with notched pistons. 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. Aside from the cost of the nitrous itself, this setup should cost you little more than a stock rebuild using all brand new parts. Car Craft mag. 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. Richard Rowe has been writing professionally since 2007, specializing in automotive topics. You need to check. I am working on a set of iron GT40s hoping it goes faster. 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. Gasoline/Diesel all makes on earth & still doing it today with great pride.Feel free to contact me anytime. In 1987, he assumed the role of editor for Hot Rod magazine before returning to his first love of writing technical stories. And agree the cams do help and a few tricks with the heads that I have discovered really make a difference. . All Ford Mustangs | Model Specific Forums, GT-40P Heads - 5.0 Mustang & Super Fords Magazine. In review, we rescued a used 5.0L Ford from the boneyard, ported the heads, added a cam, carburetor, intake manifold, and headers, and pulled an amazing 376 hp out of the mix. For a better experience, please enable JavaScript in your browser before proceeding. A bone stock 2bbl early 351w with stock replacement forged pistons (9.0 compression) and dyno headers made 211 Hp . Save narve00 fuel injection system . This will follow the guideline of a 1.6 rocker baseline and factory bottom end 79-95 related 5.0L Mustangs only. We were cruising the 'yard a while back and located a 2000 Ford Explorer with an EFI 5.0L V-8 engine. Motor is going into a Ranger. According to his data and verified dyno tests with an EFI 302, you can go above this level if you port the stock, lower intake manifold, or upgrade it altogether. The 2 heads are about the same when looking at the numbers with the GT40p heads having a slight edge. E303 Cam advanced 4 degrees. 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. Choose a cylinder head before you install the pistons. Dennis Hilliard of Central Coast says we can expect to gain three-tenths in the quarter-mile. A COMP hydraulic roller cam we found works well with this combination. 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. 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. . Just got through porting one of my gt40p heads today. I'll save the effort and lighten my front end by 50# with aluminum. This is an older thread, you may not receive a response, and could be reviving an old thread. Commonly referred to as Explorer heads, GT-40P iron castings are found on current 5.0-equipped Explorers. GT40s have 64cc chambers. JUNKYARD GT40P HEADS-ADD 30+ HP TO YOUR 5.0L (FOR FREE?) 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. On slicks the car went some low 7.70s right at 90mph. Because of this, your tuneup will probably need to be modified. Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - GT40P heads? You'll have to plug the oil hole that is in the engine from the old oil dipstick. Every thing he tells you on this site is true. 1983 Mustang G.T. You keep stock drivability, and stock gas milage if you can stay out of boost. Its funny no one mentioned anything about ignition timing or components, Your email address will not be published. $700.98. Aftermarket headers, such as those made by Hooker, BBK and Competition Engineering, are better and are just as easy, if somewhat more expensive, to procure used. Thank You. How much HP and torque do you think I. $139.99. The GT40P cylinder heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. 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. You'll also have to use your 289 timing chain cover since it has a hole for the oil dip stick and fuel pump. We are offering a pair of original Ford Cobra 5.0 GT40 cast iron cylinder heads. Ford Factory 5.0 Performance Cylinder Heads. 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. 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. Going from your heads to the GT40p heads will bump your compression by about a point.so hello bottom end torque. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. For the cherry on top of this Blue Oval desert, we bolted Mike Thermos' simple Powerstar plate nitrous system under the carburetor, installed the 140-hp jets (55 fuel and 55 nitrous), and used the trigger to retard the timing on the MSD ignition by 8 degrees. The MPH was there to run a little better but the local track is about terrible. 950.00 us a set and will ship . Shop by category. We did a quick search for hydraulic roller cams and landed on a COMP camshaft that looked promising. T5z and 3.89 9" TL rear. Mac and Ford Motorsport both make a GT40P spacific header. That's a good combo in my book. Im a different animal. 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. i've got a short block started, and i recently came across a set of GT40P heads for FREE ( love family members). An aggressive cam will wake it up a bit. There are caveats to this plan, however. 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 . While the heads were off getting a massage, we turned our attention to the cam timing. Not bad for off the shelf parts and a stock shortblock. We will go into more detail on the head mods in a later story in Junkyard Builder, so watch for it. That said there are some better aftermarket options for heads also. He'll have to get a gear for his distributor. 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. Building a 302-inch small-block to produce 400 hp is really no big deal, but doing. Test 1: 750-cfm carburetor, dual-plane intake manifold, and stock camshaft. I got a set of AFR heads , night and day. Everything fits, use the stock rockers and pushrods. I turned it because it was tired when I got it. The headers will improve this airflow throughout the entire rpm rangeadding more torque and horsepower. The rest went very smoothly, and we reused the stock lifters and suffered no ulcers worrying about breaking in the cam.