I got rid of the carburetor and went with a F.A.S.T. The GT40P heads flow a lot better than stock 351 heads. Come join the discussion about popular models such as the Mustang, Galaxie, Falcon, Fairlane, Torino, Shelby and many more! K.S. JUNKYARD GT40P HEADS-ADD 30+ HP TO YOUR 5.0L (FOR FREE?) A bone stock 2bbl early 351w with stock replacement forged pistons (9.0 compression) and dyno headers made 211 Hp . Posted on May 07, 2014 by promarengine. Slover primarily focused on the exhaust side of the GT40P heads. 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. This modification will help your late-model GT40P heads work better with the old-school carbureted intake setup. With. Build Thread 1965 Fastback Project "Racesteed". What would be the best cam and springs to use for these heads in a 302 Windsor? These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. PTP Engineering front suspension and 25540R17s all around. 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. I've not seen a set of longtubes that have an issue with GT40P's, either. 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. A forum community dedicated to Ford Mustang owners and enthusiasts. Well offer one as an example. Through Central Coast you can have the heads fully prepped for your combination. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. These are Ford iron GT-40P heads. Actually the regular gt40's in either aluminum or iron are the good ones but the gt40p's are only a slight improvement over regular 302 heads. Not to mention, they will run circles around GT40P's out of the box. 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 SBF OEM | eBay Motors, Parts & Accessories, Car & Truck Parts & Accessories | eBay! Step 1. Yeah, out of a bolt on upgrade, you'd probably be looking at 260-280rwhp ish with supporting mods. If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. i have a 302 engine from a 1977 granada and i am wondering if gt40p heads from an explorer will fit on this motor. Runs well. 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. 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. 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. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. The factory heads have a boss for the exhaust valve that restricts flow through the exhaust port. (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. Its NA but makes use of AFR heads and some other aftermarket goodies. Learn how your comment data is processed. The GT40P heads flow a lot better than stock 351 heads. 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. 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. Ask Away! with Jeff Smith: Camshaft and Cylinder Head Recommendations I'll save the effort and lighten my front end by 50# with aluminum. The headers will improve this airflow throughout the entire rpm rangeadding more torque and horsepower. I need that part number too! This pushed that little Ford to a peak horsepower of 503, and that was where we stopped. This needs to be removed and different exhaust valves, retainers, and valve springs added to turn this into a decent street head. 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. 69.90.139.244 That's an improvement of 22 hp over Test 2. Stock 93-95 Cobra shortblock (stock cobra cam), GT40X heads, 1.7 rockers, Edelbrock Performer RPM intake, Holley 650, and longtube headers. Test 3: Installed the larger Lunati camagain, no other changes. I had a set of 69 302 heads I ran for a while . We need a build on a 400+ hp 302/6 build. 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. Building 400hp Into A 5.0L Small-Block Engine - MotorTrend 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. This will cost additional money but is still worth it, in our opinion. Smith began writing for Car Craft magazine in 1979 and became editor in 1984. Theres many options available for a little more power. I turned it because it was tired when I got it. 351W D0OE-C heads better than GT40P\'s? - Ford Muscle Cars Tech Forum This is what I recommend to everyone who is doing a budget 5.0 build. Let us explain. They almost seem like flywheel numbers rather than RWHP numbers. I got a set of AFR heads , night and day. Assorted screwdrivers, pliers and vise-grips. The Fora platform includes forum software by XenForo. This combination should be good for about 400 horsepower and as much as 500 if you opt to use the stronger aftermarket pistons. I have a very good running stock 1981 302 in a F100 short box. 1979 Indy 500 Pace Car. With no other changes we gained 25 hp using factory iron heads. It's a classic move we've pulled off many times. Their weak point is that the rotator used on the exhaust valve is very thick. GT40, GT40P, would be great factory heads. at the crank. will gt40p heads fit on a 302 | Ford Mustang Forum Anythoughts? Can anyone give me a little feedback about a '99 Explorer 5.0, and tell me if it's my answer. We did a quick search for hydraulic roller cams and landed on a COMP camshaft that looked promising. 950.00 us a set and will ship . Best of all, no machining is required to install these on your stock cast iron heads! For a better experience, please enable JavaScript in your browser before proceeding. Most of them are aware of what changes need to be completed. Commonly referred to as Explorer heads, GT-40P iron castings are found on current 5.0-equipped Explorers. gt40p heads on a 289 in a 66 | Vintage Mustang Forums 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. Every thing he tells you on this site is true. FULL DYNO RESULTS. AFR 165cc 58cc Heads. If we subtract the 20 hp that the fan is worth, we end up with a gain of 25 hp. Stock 1989 5.0L HO pistons will work if you can find them. 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. Anyways, I know the gt40ps will bump . Have fun, be safe, enjoy. That's more than enough to feed a power-brake booster. Calculated compression to 9.8:1. Richard Holdener 240K subscribers Subscribe 63K views 1 year ago WESTECH PERFORMANCE GROUP LOW BUCK, GT40P 5.0L HEADS-CHEAP &. $700.98. In 1987, he assumed the role of editor for Hot Rod magazine before returning to his first love of writing technical stories. A good port job can set you back another $500-$1,000. REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS. I was looking at putting on the GT40P heads on. GT40P heads, 302 and Victor Jr. intake: - Factory Five Racing Forum The spark plug issue is almost a non-issue. 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. A solid 300-325 hp should be plenty and that's with good drivability and reliability as well. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. check out the. 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. The Fora platform includes forum software by XenForo. The engine never huffed oil out of the breathers, and the spark plugs all looked excellent. are you twisted331 also? 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. Those are really good numbers. (Please note these are not GT40P Explorer heads). We gained 45 hp and 40 lb-ft of torque. Assemble the rotating assembly with a stock 5.0L crankshaft, a set of 5.0L rods and the specified pistons with stock-type rings. 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. GT40 vs GT40P: Who has Smaller Chamber Volume ! More compression

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