This pushed that little Ford to a peak horsepower of 503, and that was where we stopped. JUNKYARD GT40P HEADS-ADD 30+ HP TO YOUR 5.0L (FOR FREE?) 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. 69-70 302 heads (the ones with the heart-shaped combustion chamber) Any early 289 heads for the chamber size (but you'll have small ports & valves w/all that CR) Flat Ernie, Aug 27, 2011 SHARE POST #8 fordfan289 Member from indiana correct me if Im wrong but cant you use 351c heads and get the same thing as a 302 boss. Shop by category. The 302 uses smaller 7/16" head bolts and your "P" heads may or may not require the step washers. With the GT-40P heads you will need to back off the timing a couple degrees and bump up the fuel pressure. (its not their engine) . Manual trans. The rest went very smoothly, and we reused the stock lifters and suffered no ulcers worrying about breaking in the cam. And have discovered something that I dont think anyone else knows. 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. 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. That's an improvement of 22 hp over Test 2. Very true about finding them at the local yards. Compare. 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. 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. 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. Click to reveal 1.7 shaft rockers and beehives. 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. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. 68 XR7 & 68 M-100. i have a 302 engine from a 1977 granada and i am wondering if gt40p heads from an explorer will fit on this motor. For a better experience, please enable JavaScript in your browser before proceeding. Stock 93-95 Cobra shortblock (stock cobra cam), GT40X heads, 1.7 rockers, Edelbrock Performer RPM intake, Holley 650, and longtube headers. '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 Holten runs the factory fan, but he had removed it when he ran the 12.63. T5z and 3.89 9" TL rear. +1 I would go with the regular GT40 heads. i've got a short block started, and i recently came across a set of GT40P heads for FREE ( love family members). 97% Positive Feedback . Cast iron GT40Ps as cast flow better than non-Ps due to revised plug location/angle. Stock valve sizes? 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. Advanced: Daily Deals; Help & Contact; Sell; My eBay Expand My . Not sure about that but got some pictures of the cast iron explorer manifolds on a 302. If you smooth out the bowls and exhaust ports and gasket match the intakes they should flow decent. 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. But the part about a cam replacement possibly being a labor intensive undertaking is correct. They were located in Tahachapi CA, and were sold with upgraded springs for $650.00, back in 2002-2003 ish. But dont think that adding a bigger camshaft will make more power. Learn how your comment data is processed. They also have emissions legal heads as well. After a couple grand you have a killer set of heads, but there's got to be a less-expensive way of making horsepower. #3::: Do your homework,get quality parts,dont skimp. 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. SB Ford GT40P Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. Long tube headers are a terrific idea, but you need to open up the exhaust side. Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. For the most part 302 heads and 351W heads are the same. You can email the site owner to let them know you were blocked. Features hardened 4140 Chromoly retainers, valve locks, spring shims, a spring height gauge, valve seals, and instructions. Here is the lowdown on exhaust manifolds and VALVE SPRINGS. Not when you can buy a set of Promaxx or AFR Enforcer heads for $1000, that already have decent hardware included. The later model distributors had a different diameter shaft than the earlier ones. 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. 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. 02-11-2012, 07:16 PM #6 fiveoh 86lx This is needed for the steel roller cam. I'd much rather be able to drive it at 8 or 9/10s of what it can handle. Despite adding 30 degrees of intake duration, this cam improved torque throughout the entire test from 3,000 rpm on up. 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. SB Ford, GT40 .575" Lift Max Output II Drop in Valve Spring Kit, Hyd Roller, 140 Lb Seat. 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. Holten tells us removing the fan is worth two-tenths in itself, which tells us the fan soaks up roughly 20 hp. This is a function of the somewhat wider lobe-separation angle of 112 degrees. We gained 45 hp and 40 lb-ft of torque. I used Lightning heads on my 302, (GT40 not P) with stock rockers on a flat tappet engine. Assemble the rotating assembly with a stock 5.0L crankshaft, a set of 5.0L rods and the specified pistons with stock-type rings. What you are trying to do is to increase the amount of airflow through the engine in order to make more power. JavaScript is disabled. 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. GT40s have 64cc chambers. Where they differ is the combustion chamber size. Skip to main content. 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. by travis Sun May 03, 2020 8:33 am. A good port job can set you back another $500-$1,000. I spin it to 6500 and thats about it. Is asking advice for a fairly common situation involving parts with mandatory compatibility between the two for performance and longevity. These cast piston short-blocks are not quite as good as the forged piston 5.0L that came in Fox-body Mustangs, but the GT40P heads flow much better than earlier 5.0L heads. Here a comparison of different heads on a 302: I'm very happy with my GT40P. 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. people can stop saying that adding aftermarket cam with stock heads is a waste of time. I'll save the effort and lighten my front end by 50# with aluminum. SBF engines are modified constantly. Plus you will need to drill all the head bolt holes out as the 351W uses larger head bolts. However there are plenty of factory heads that with the help of an experienced machine shop can be great. But what we were most impressed with was the solid gain in torque over the smaller Voodoo cam from 3,500 and up. Not to mention, they will run circles around GT40P's out of the box. The '00 Ford Explorers and Mercury Moutaineers were factory equipped with one of Ford's better 5.0L motors. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. In addition, the cam timing was designed for torque, with duration somewhere around 190 degrees at 0.050 with roughly 0.450-inch lift. 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 GT40P heads flow a lot better than stock 351 heads. With the P-heads requiring pedestal-mount rockers, we also called up Crane Cams for a set of 1.6 pedestal-mount roller rockers. The spark plug issue is almost a non-issue. I need that part number too! I have a 5.0 from a 1992 Mustang in my 65. Over $2050 for the 165/185 renegades. I've got gt40p heads for it I'll be running, and can't afford better . It's a classic move we've pulled off many times. 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. The GT40P cylinder heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. I must agree with Jeff Smith. Also, the spark plug angle makes it a pain. Save narve00 The 2 heads are about the same when looking at the numbers with the GT40p heads having a slight edge. LOW-BUCK 302 FORD HEAD UPGRADE Richard Holdener 239K subscribers 189K views 2 years ago WESTECH PERFORMANCE GROUP WHAT'S IT WORTH? That's more than enough to feed a power-brake booster. I went to a couple in Tucson and almost all the Ford vehicles that came with a 5.0 had the heads missing. Last Edit: January 18, 2015, 12:05:31 pm by businesstrader Logged shaunp. Perhaps even more surprising was how well this engine idled, calmly purring with 16 inches of manifold vacuum at 980 rpm. 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. 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. And remember ENGINES have been being built/rebuilt/modified for years. Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. Free shipping. Ill do springs and a moderate cam and go for a good, dependable power plant. Compare. You'll have to plug the oil hole that is in the engine from the old oil dipstick. I wouldnt recommend reusing lifters though. Calculating pushrod length We heated the bottle to 950 psi and hit the button at 4,500 rpm. 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. That carbureted GT40P motor made 465 on th engine dyno with a .500" 239/244 camshaft, Holley 650 carb and Weiand Stealth intake. 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 . 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. thats after 3 hours of idling/midrange hits to tune the idle and part throttle . At 4,300 rpm, the torque peaked at 348 lb-ft, a solid 20-lb-ft improvement, and the Lunati continued to outperform the stock cam all the way through with a peak horsepower increase of 60 hp at 354 hp at 5,700 rpm! 1983 Mustang G.T. They suffered from poor aftermarket support up until about 15 years ago when it really came on strong. Go for it if you get them super cheap and can get headers/manifolds super cheap as well but otherwise I'd say it's a waste of time and money. THANKS VERY MUCH! Well also assume that this engine is running stock exhaust manifolds. 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. Boy, were we surprised with the results. I have a 302 Windsor V8 EFI engine that I converted to a 600 cfm carburetor with a Street Warrior intake manifold. The Fora platform includes forum software by XenForo. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more! Im a different animal. (Image/Harrison Creamery). Ford Factory 5.0 Performance Cylinder Heads. The headers will improve this airflow throughout the entire rpm rangeadding more torque and horsepower. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 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. But don't think that adding a bigger camshaft will make more power. Beyond the engine's amazingly good appearance, Moore had a couple of good reasons for choosing this engine. The action you just performed triggered the security solution. All this is worth it. Depending on the Headers you have you might be okay. I'm an old school guy (289 in 65 mustang), and I'm just looking into the new 5.0 engine (roller cam) stuff recently. 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. AFR 165 Heads | Have options for pedestal mounted rocker arms or stud mounted rocker arms. If you wanted to make your engine feel strong, these would be a decent investment, but they will require some modifications. No-option stripper- I like strippers. 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. Sponsored. Took me 7 hours to do one head.but they cleaned up real nice. The newer camshaft is designed for use with a soft bronze distributor gear, not the hardened steel gear used for older camshafts. 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. Per a UEM tech support email I have the Icon IC736 is supposed to be good for GT40 heads when I asked about it. 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. After we installed the heads and with the fan off, he ran a 12.46 at 107.9. Overview. Its increase while significant is still only about that of a decent 351 w, hi im building a nastalgic car so im not going to drag race it but it must go ok ive got a 302 windsor basicly recoed stock but i want to run tunnel rams to go with the the3am would like to put choppy cam and replace the heads any ideas would be much apprecited thankyou, What is the stock head cc of a 1992 f150 302 windsor. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. You didnt mention which cam you had in mind. check out the. You just want to keep it out of detonation. 68stang351 Founding Member May 16, 2002 850 Its NA but makes use of AFR heads and some other aftermarket goodies. Eldelbrocks Air Gap intake manifold should work well with the combination. A bone stock 2bbl early 351w with stock replacement forged pistons (9.0 compression) and dyno headers made 211 Hp . 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. If you know him, ask him. How much HP and torque do you think I. The only way to really make more power is to go with a stroker kit, blower and/or heads. 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. We were cruising the 'yard a while back and located a 2000 Ford Explorer with an EFI 5.0L V-8 engine. Just got through porting one of my gt40p heads today. We did a quick search for hydraulic roller cams and landed on a COMP camshaft that looked promising. Now we know why Dennis Hilliard of Central Coast Mustang is so high on these heads. Have fun, be safe, enjoy. Build Thread 1965 Fastback Project "Racesteed". 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. Its funny no one mentioned anything about ignition timing or components, Your email address will not be published. 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. the engine is carburated of that makes a difference. This is the main reason why these engines are not modified as much as the small block Chevy. You gave me the info I was looking for, and I really do appreciate it. 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. The results were a major increase in power throughout the entire rev range, with an increase of 60hp at 4500rpm through to a peak of 279hp at 5800rpm. However I think the opportunity window is slowly closing. Yes- thank you. Because its all been done time after time after. GT40P heads, what kind of performance do they give? This one added another 10 degrees of duration over the smaller Voodoo cam, along with 0.020 inch more intake valve lift. Real world data seems to show that GT40 or GT40P cylinder heads, assuming no other mods on your Foxbody, are good to add anywhere between 20-40 HP (over stock heads). $930.00 + $55.00 shipping. Most of them are aware of what changes need to be completed. Do not ever, ever think about using the tube type manifolds. Hey all, I'm working on building a 302 with my gt40p heads. Rowe studied engineering, philosophy and American literature at Central Florida Community College. Test 3: Installed the larger Lunati camagain, no other changes. E303 Cam advanced 4 degrees. He'll have to get a gear for his distributor. 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. This will keep you from dropping your overall static compression ratio and losing power. You can find them on later model Mercury Mountaineers and several other Ford SUV applications. If you can find individual flanged headers like the obsolete MAC headers had, those worked really well with GT40P's. Shop by category. Yeah, except those. a) ain't early and b) aren't 289 heads. The Edelbrock Performer RPM is a good choice, but Holley, Weiand and Ford Motorsport also have similar offerings. 69.90.139.244 As usual, there is much more to this story. 1983 Mustang G.T. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. 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? 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. I am working on a set of iron GT40s hoping it goes faster. It runs smooth but seems lazy. You can have your current 28 oz rebalanced to 50. 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. i'd love to use these heads,. This will cost additional money but is still worth it, in our opinion. This modification will help your late-model GT40P heads work better with the old-school carbureted intake setup. We set the timing to 34 degrees and rejetted the carburetor to get our desired 12.5:1 air/fuel ratio. 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. Assorted screwdrivers, pliers and vise-grips. A forum community dedicated to vintage Ford Mustang owners and enthusiasts. Buy the lifters for peace of mind now and hopefully for the duration. Richard Holdener 240K subscribers Subscribe 63K views 1 year ago WESTECH PERFORMANCE GROUP LOW BUCK, GT40P 5.0L HEADS-CHEAP &. Like I said lots of options. In mid-1997, the Explorer and Mountaineer 5.0 L heads were revised and renamed . Headers and a camshaft will help but the engine really needs aftermarket 3/8 inch connecting rod bolts and aftermarket cylinder heads. Once you get into the FoMoCo aftermarket aluminum GT40s though, all bets are off. #1:::Throw out all your Magazines that suggest what to do! 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. All in all, the addition of GT-40P heads to any 5.0 Mustang is a worthwhile venture, especially if you're on a budget (aren't we all) or shooting for the Trophy Stock title. 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. Start with any 302 block, but try to find one from 1985 and up since it will already have provisions for a roller camshaft. Once the headers are in place, then you can consider if you still want more power. The GTp heads are like GT 40's with smaller combustion chambers and the spark plugs are relocated for a more efficient burn. Depends on the budget. A trip to Orlando Speed World provided us with updated quarter-mile times. I bought a crate 302 from Downs Ford a few years ago that was producing 320 hp. The gt40p head is considered the best OEM 302 head made. You keep stock drivability, and stock gas milage if you can stay out of boost. Ported Hurricane Single Plane and custom 750 HP. Cloudflare Ray ID: 7a2e2d95dedea1e4 The question was whether we wanted a torquey small-block or a more cammed-up rpm engine to boost peak horsepower. Install a Ford Motorsport E303, X303 or F303 cam, or any of the similar units from Indy, Lunati or your favorite manufacturer. Yea. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. Step 1. Over $2050 for the 165/185 renegades. I added a link to it. However, stepping up in the performance head market will set you back more than $1,200 for a decent pair of aluminum castings--and that's straight out of the box, with no porting. The cost of a new set of standard replacement roller lifters is very affordable at major retailers like Summit. Good on ya Jeff Smith. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. 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. I may do some port matching and a little cleanup, otherwise just a set of springs and cam and see what I have. What did the heads flow? 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. Then why did you port the heads and how do you know if you made an improvement.

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