No-option stripper- I like strippers. Gt40p heads - FourEyedPride.com Ill do springs and a moderate cam and go for a good, dependable power plant. Install a Ford Motorsport E303, X303 or F303 cam, or any of the similar units from Indy, Lunati or your favorite manufacturer. 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 Finding Gt40p heads at the junkyard is getting more and more complicated and if you want to upgrade the heads you have to take into account the costs of the machine shop and compare everything to a set of cheap aluminum heads. However I think the opportunity window is slowly closing. 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. 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. . 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. A forum community dedicated to Ford Mustang owners and enthusiasts. Yes- thank you. Within a few hours of his discovery, the engine was sitting in the back of his truck on its way to a new home. Also, you'll need to get a steel distributor gear to replace the iron gear that is currently on your distributor. FORD GT40p 4 BAR HEADS IN GOOD CONDITION w/ONE BOLT BROKEN There are caveats to this plan, however. Stock valve sizes? $700.98. For a better experience, please enable JavaScript in your browser before proceeding. 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. A trip to Orlando Speed World provided us with updated quarter-mile times. This needs to be removed and different exhaust valves, retainers, and valve springs added to turn this into a decent street head. JEGS High Performance. If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. 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. I am working on a set of iron GT40s hoping it goes faster. If you go with a diffrent cam, make sure you change springs, The Trick Flow kit comes with everything for around $130. HiPo manifolds and Ill be good. The best thing to do would be to use a specific break-in oil for the first 200 to 300 miles of use to reduce the change of a potential problem with undue wear. This is an older thread, you may not receive a response, and could be reviving an old thread. gt40p heads on a 289 in a 66 | Vintage Mustang Forums The asterisk HP differences are calculated using Test 1's 294-hp peak. Sure, you could race-port the existing E7 castings, which many have done, but then you're putting quite a bit of change into stock heads. The factory heads have a boss for the exhaust valve that restricts flow through the exhaust port. Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more! Building a 302-inch small-block to produce 400 hp is really no big deal, but doing. Well assume it is a 5.0L with stock heads. any input is apprecciated:smartass: Thank you for the info, if all I have to worry about is the plugs then I'm in good shape hahaha. GT40P heads, 302 and Victor Jr. intake: - Factory Five Racing Forum There are a lot of variables that must be addressed to give a better estimate, but a good basic estimate is 20-40 HP at the crank. 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. I'm also have the regular GT40 heads on my current build. Compare. Cloudflare Ray ID: 7a2e2d95dedea1e4 We turned to Rare Auto Design in Orlando for dyno tests to find out how much horsepower we gained. 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. 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. GT40P heads? how hard to put on? how much HP and torque? Where they differ is the combustion chamber size. The GT40 & GT40P heads had a few differences that are note-worthy, the most importantly being the bump in compression. BONUS TEST-FOUR DIFFERENT 302 INTAKES.. And remember ENGINES have been being built/rebuilt/modified for years. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. 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. Budget 300HP 302 Build This one added another 10 degrees of duration over the smaller Voodoo cam, along with 0.020 inch more intake valve lift. Yeah, except those. a) ain't early and b) aren't 289 heads. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. The only one that's close, is #7. This pushed that little Ford to a peak horsepower of 503, and that was where we stopped. Using the manufacturer recommended springs for your camshaft are a safe bet. people can stop saying that adding aftermarket cam with stock heads is a waste of time. The GT40P cylinder heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. SB Ford, GT40 .575" Lift Max Output II Drop in Valve Spring Kit, Hyd Roller, 140 Lb Seat. They suffered from poor aftermarket support up until about 15 years ago when it really came on strong. Paying a premium for a set of GT40P heads or dumping money into some to get their performance to rival aftermarket is not for me. i have a question once i get the gt40p heads from the explorer truck can i also take the exhaust manifolds or headers and fit them in my 66 mustang:?:!?!?!? 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. 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. I guess someone could just do a basic valve job and throw on the GT40 upper/lower intake for a cheap HP boost. Really hurt too. Stock 93-95 Cobra shortblock (stock cobra cam), GT40X heads, 1.7 rockers, Edelbrock Performer RPM intake, Holley 650, and longtube headers. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Ask Away! with Jeff Smith: Camshaft and Cylinder Head Recommendations When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Here is the lowdown on exhaust manifolds and VALVE SPRINGS. 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. In mid-1997, the Explorer and Mountaineer 5.0 L heads were revised and renamed . Nudge us with emails, and we'll make it happen. Pride is built, in your garage, with your two hands. Win or lose, if you buy the ticket you must take the ride. made more power everytwhere and 40 hp is respectable. Choosing pistons to complement GT40P heads - MustangWorks.com REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS | What's New Per a UEM tech support email I have the Icon IC736 is supposed to be good for GT40 heads when I asked about it. Overview. At the dragstrip, we gained two-tenths and 2 mph. Over $2050 for the 165/185 renegades. 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. With the engine reassembled, we boxed up our second camshaft and headed for Westech's dyno. Test 1: 750-cfm carburetor, dual-plane intake manifold, and stock camshaft. We started with a 120,000-mile 5.0L out of a Ford Explorer, removed the EFI and DIS, and pocket ported the stock GT40P iron heads with stock valve sizes. I have a very good running stock 1981 302 in a F100 short box. are you twisted331 also? Stock heads with a fresh 3-angle valve job, shorty headers, T5, 4.10s, stock Explorer intake and stock '88 GT short block with 140,000 miles on it and an E cam in it. 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. Seriously though if you're not planning on an all-out attack for HP, I'd consider a forged piston out of Probe's SRS line-up. Boy, were we surprised with the results. Hey Motorheadty,Like your comments,question for ya,I have a 92 convertible,just bought a 5.0 out of a 94 gt that was just freshened up top end,gt40p heads w/new springs etc for the new E303 cam,new FRP roller lifters,Crane 1.7 rockers,hardened push rods,double roller timing set,all put on a bottom end w/104000 miles,needless to say previous owner pulled said engine after 800 miles and now building a 351,I pulled engine down my machinest,putting forged internals in and bolting everything back together,I want to run about a 150 shot N2o,and iam going carb,wondering which intake would be best w/the 150 shot,heard that dual planes might not be the way to go? I got lucky and found a complete Explorer GT40P engine online. However there are plenty of factory heads that with the help of an experienced machine shop can be great. Yea. Not to mention, they will run circles around GT40P's out of the box. I have to agree, the GT40P heads flow better than the GT40 iron heads. Fastest e303 5.0l's? - FourEyedPride.com This time around, we chose a shining example of this junkyard art form. E303 Cam advanced 4 degrees. So . You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. Instructions on porting the GT-40p heads here. There are a couple of reasons for this suggestion. We compare the GT40s to modern cylinder heads as well as other heads from the era. Along with the heads, we used MAC headers for GT-40P heads. Supercharging GT40p heads | Modded Mustang Forums 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! Mustang Cylinder Head & Camshaft Guide (79-95) - LMR 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. I plan on running a AFM b31 cam too which has relatively small duration for the intake valve. I've got gt40p heads for it I'll be running, and can't afford better . at the crank. This is the main reason why these engines are not modified as much as the small block Chevy. 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. There are literally a dozen or so camshaft companies that offer a mild hydraulic roller cam for a 5.0L Ford. I had a set of 69 302 heads I ran for a while . Step 2. Trick Flow Mustang Valve Spring Upgrade Kit - Cast Iron Head (79-95) If I remember right, non of the GT40P's (later models) had the thermactor smog provisions. 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.

Fort Pierce News Shooting, How To Change Keldeo Form Poketwo, Jersey Sweet Potato Vs Sweet Potato, Articles OTHER