. PTP Engineering front suspension and 25540R17s all around. Purchase any used aftermarket manifold for the 302 that is designed to function in the 3,500 to 6,500 power band. Free shipping. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. Check my post above. I spin it to 6500 and thats about it. Long tube headers are a terrific idea, but you need to open up the exhaust side. Cant wait to try um out. Win or lose, if you buy the ticket you must take the ride. Perhaps even more surprising was how well this engine idled, calmly purring with 16 inches of manifold vacuum at 980 rpm. 68stang351 Founding Member May 16, 2002 850 Thank You. For this reason, we're not sure what kind of boost the GT-40P heads will give. 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. 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 SBF OEM | eBay Motors, Parts & Accessories, Car & Truck Parts & Accessories | eBay! Take the assembly to a machine shop to have it balanced and install it in the block. . Despite adding 30 degrees of intake duration, this cam improved torque throughout the entire test from 3,000 rpm on up. You should be able to get away with a 150 to 200 horsepower shot later, but it's best to start out small and work up. That's a good combo in my book. After we installed the heads and with the fan off, he ran a 12.46 at 107.9. In 1987, he assumed the role of editor for Hot Rod magazine before returning to his first love of writing technical stories. We also added a veteran Ford magnetic pickup distributor and used it to drive an MSD ignition system. But what we were most impressed with was the solid gain in torque over the smaller Voodoo cam from 3,500 and up. JavaScript is disabled. JavaScript is disabled. JUNKYARD GT40P HEADS-ADD 30+ HP TO YOUR 5.0L (FOR FREE?) We compare the GT40s to modern cylinder heads as well as other heads from the era. If this is beyond your technical ability, you could ask a local machine shop to perform the modifications. Holten tells us removing the fan is worth two-tenths in itself, which tells us the fan soaks up roughly 20 hp. 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. 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. BONUS TEST-FOUR DIFFERENT 302 INTAKES.. 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 MPH was there to run a little better but the local track is about terrible. Ported Hurricane Single Plane and custom 750 HP. 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. Over $2050 for the 165/185 renegades. The headers will improve this airflow throughout the entire rpm rangeadding more torque and horsepower. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Step 1. 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. i'd love to use these heads,. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. Just make sure it is a roller cam. The HP DIFF column on the far right lists the horsepower difference between Test 1 and Test 3. The tube headers showed a gain of almost 100 hp! GT40Ps have 58cc. Smith began writing for Car Craft magazine in 1979 and became editor in 1984. are you twisted331 also? Central Coast Mustang sells GT-40P heads at a great price, making them a viable alternative in a market flooded with performance head choices. 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. The only way to really make more power is to go with a stroker kit, blower and/or heads. Slover primarily focused on the exhaust side of the GT40P heads. 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. When I purchased my "brand new" set of GT40P's, I bought them from an Mustang specific machine shop that used to exist called Central Coast Mustang. 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. If we subtract the 20 hp that the fan is worth, we end up with a gain of 25 hp. $139.99. 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. The dyno recorded a peak horsepower reading of 489 hp, but the air/fuel ratio was slightly on the rich side at 11.5:1, so we increased the nitrous jet to a 61 and hit the button again. I used Lightning heads on my 302, (GT40 not P) with stock rockers on a flat tappet engine. Advanced: Daily Deals; Help & Contact; Sell; My eBay Expand My . When building an engine there is a lot to take into consideration. Where they differ is the combustion chamber size. $930.00 + $55.00 shipping. You didnt mention what camshaft you would be choosing or exactly which 5.0L Ford Windsor engine you are working with. Stock 1989 5.0L HO pistons will work if you can find them. #2::: Get advice from a reptile engine builder with experience(first flag for me is when somebody refers to an ENGINE as a MOTOR! 950.00 us a set and will ship . Both swaps made more sense when parts were readily available at the bone yard for cheap. Yes- thank you. What did the heads flow? 1983 Mustang G.T. I don't need tons of power to enjoy the car. Im now thinking of adding a cam to match the carb. Ha! Thanks. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. He'd be the best source. The action you just performed triggered the security solution. *** 65 Mustang 351C 4v, AOD, 4.11 gears *** 66 Galaxie convert big block. Not sure how they would mate up to your existing exhuast, but otherwise they should work. Never not once have I ever seen a SBF rod bolt create a failure. You gave me the info I was looking for, and I really do appreciate it. The question was whether we wanted a torquey small-block or a more cammed-up rpm engine to boost peak horsepower. Using the manufacturer recommended springs for your camshaft are a safe bet. Have fun, be safe, enjoy. This combination should be good for about 400 horsepower and as much as 500 if you opt to use the stronger aftermarket pistons. Posted on May 07, 2014 by promarengine. 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 . THANKS VERY MUCH! Theres many options available for a little more power. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Torque on the other hand isnt something to write home about. Dennis Hilliard of Central Coast says we can expect to gain three-tenths in the quarter-mile. What would be the best cam and springs to use for these heads in a 302 Windsor? Manual trans. 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. That said there are some better aftermarket options for heads also. . The kit offers adjustable power from 50 to 250 hp with a simple jet change. (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. Gasoline/Diesel all makes on earth & still doing it today with great pride.Feel free to contact me anytime. For real performance, stock E7TE heads leave a lot to be desired. Common sense would suggest that with the heavy lifting complete and the old cam removed, by not installing the new roller lifters along with the camshaft could be asking for the possibility of trouble just a few thousand miles down the road. I got lucky and found a complete Explorer GT40P engine online. They suffered from poor aftermarket support up until about 15 years ago when it really came on strong. at the crank. GT40s have 64cc chambers. Well assume it is a 5.0L with stock heads. They fill that spot between power and budget. You can have your current 28 oz rebalanced to 50. Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - anyone have experience with GT40P heads on a 92 351W - ive got a 92 F250 with a 351W that needs a pretty serious rebuild. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. . Definitely going to use my P heads. I got rid of the carburetor and went with a F.A.S.T. Required fields are marked *. 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. Boy, were we surprised with the results. Shop by category. There was an article in Hot Rod magazine in the mid '80's where Jon Kaase was developing 351w packages. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. Motor is going into a Ranger. Add a distributor designed for a carbureted 302 but make sure to install the correct distributor gear for your cam. could the gear of off the oil pump drive(i know they're DIS), for the explorer motor be used on his dizzy? 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. 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. Richard Rowe has been writing professionally since 2007, specializing in automotive topics. Very true about finding them at the local yards. I plan on running a AFM b31 cam too which has relatively small duration for the intake valve. 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). Well that article just got me very ancy, I want these heads!! Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. this head fits years 95-01 explorer mountaineer mercury mountaineer . It runs smooth but seems lazy. 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. fuel injection system . They were located in Tahachapi CA, and were sold with upgraded springs for $650.00, back in 2002-2003 ish. On the power side, we selected 400 hp as an impressive but reasonable output for our small-block 5.0L Ford. United Engine and Machine sells cheap but decent pistons that will do what you're wanting. Don't let the fact that the iron GT40 heads have a larger exhaust valve fool you. Late-model ford GT40 and GT40P heads with 1.84-inch intake valves will also flow 185 cfm at 0.50 . I recall having an absolute blast with my old K-code coupe back in the day. We didn't increase the valve size, although we did have to add Manley valves to get the proper spring-installed height. So I've got the motor and heads already for my maverick project. 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. 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. i have a 302 engine from a 1977 granada and i am wondering if gt40p heads from an explorer will fit on this motor. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. The factory heads have a boss for the exhaust valve that restricts flow through the exhaust port. T5 with 3.73s. (its not their engine) However I think the opportunity window is slowly closing. Once the headers are in place, then you can consider if you still want more power. They also have emissions legal heads as well. 302 .030 over with; Scat Forged Steel Rods, SpeedPro pistons and rings . Like I said lots of options. Their weak point is that the rotator used on the exhaust valve is very thick. This modification will help your late-model GT40P heads work better with the old-school carbureted intake setup. What you are trying to do is to increase the amount of airflow through the engine in order to make more power. Both have very similar valve sizes, but the GT40P head has slightly larger combustion chambers for a small bump in compression and better flow. A solid 300-325 hp should be plenty and that's with good drivability and reliability as well. I am very happy too. Come join the discussion about popular models such as the Mustang, Galaxie, Falcon, Fairlane, Torino, Shelby and many more! Anythoughts? 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. The rest went very smoothly, and we reused the stock lifters and suffered no ulcers worrying about breaking in the cam. Learn how your comment data is processed. Click to reveal Not bad for off the shelf parts and a stock shortblock. 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. 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. Free shipping for many products! With the engine reassembled, we boxed up our second camshaft and headed for Westech's dyno. Joined: Sun Mar 15, 2009 9:31 am. An aggressive cam will wake it up a bit. 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. #3::: Do your homework,get quality parts,dont skimp. 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. Along with the heads, we used MAC headers for GT-40P heads. I have a 432 HP non Hi Po 289 I built. I've not seen a set of longtubes that have an issue with GT40P's, either. 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. Also, the spark plug angle makes it a pain. This engine will be good for your 65 Mustang. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. just curious. I need that part number too! Depending on the Headers you have you might be okay. Really hurt too. For a better experience, please enable JavaScript in your browser before proceeding. 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! 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. Im a different animal. Per a UEM tech support email I have the Icon IC736 is supposed to be good for GT40 heads when I asked about it. For a better experience, please enable JavaScript in your browser before proceeding. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. hole size 302 is 7/16 and 351 is 1/2 built one using a 91' HO short block with a set of AFR 165 heads, Weiand . At the time, I was still running smog equipment in a 1994 Mustang GT, so I had them drill the back of the heads for the thermactor connection. I bought a crate 302 from Downs Ford a few years ago that was producing 320 hp. 1983 Mustang G.T. Scorpion 1.6 roller rockers. FULL DYNO RESULTS. If you have a early 351W ie pre 76 it probably . bmcdaniel, Feb 17, 2004 #7. v8maverick Member. Anyways, I know the gt40ps will bump . The heads also required some machine work, including screw-in studs, guideplates, and widening the spring pockets for bigger valvesprings. GT40, GT40P, would be great factory heads. Gt40 heads/intake from a jy explorer, leave the . Even with relatively small valve sizes of 1.85-inch intake and 1.46-inch exhaust, the P-heads flow much better than previous. 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. Now we know why Dennis Hilliard of Central Coast Mustang is so high on these heads. We will go into more detail on the head mods in a later story in Junkyard Builder, so watch for it. For the most part 302 heads and 351W heads are the same. The GT40P cylinder heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. The Fora platform includes forum software by XenForo. I have been working on Fords for 40 years and I have experimented with a few tricks of my own. Install a used set of 5.0L Mustang "shorty" headers, generally available at auto swap meets for a reasonable price.
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302 with gt40p heads horsepower
