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. 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. Ford's seminal 302 engine (later re-dubbed the 5.0) has been popular with budget-minded hot rodders for decades. When combined with modern power-makers, such as nitrous, the 302 is more than capable of producing 400+ horsepower for little more than the cost of a stock engine rebuild. This is an older thread, you may not receive a response, and could be reviving an old thread. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. If this is beyond your technical ability, you could ask a local machine shop to perform the modifications. You need to check. anyone have experience with GT40P heads on a 92 351W That's a 40 per cent increase in power from a simple head and cam swap, and one seriously happy Mustang owner! this head is complete with new 1.837 int valves and 1.536 exhaust valves. Eldelbrocks Air Gap intake manifold should work well with the combination. At the dragstrip, we gained two-tenths and 2 mph. 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. Then why did you port the heads and how do you know if you made an improvement. Just put some 1.7 pedistal rocker arm on along with a mild camshaft (make sure to use the correct valve springs), you will make over 300 flywheel hp. Features hardened 4140 Chromoly retainers, valve locks, spring shims, a spring height gauge, valve seals, and instructions. However, when we dyno'd the car before installing the GT-40P heads, the fan was on the car. What you are trying to do is to increase the amount of airflow through the engine in order to make more power. Tim's junkyard refugee survived the beating and we had a bitchin' story. Once the headers are in place, then you can consider if you still want more power. Yeah, except those. a) ain't early and b) aren't 289 heads. Free shipping. Works on all factory cast iron E7, GT40, and GT40P cylinder heads! 1 - 7 of 7 Posts. hole size 302 is 7/16 and 351 is 1/2 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. If you wanted to make your engine feel strong, these would be a decent investment, but they will require some modifications. Build Thread 1965 Fastback Project "Racesteed". For this reason, we're not sure what kind of boost the GT-40P heads will give. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. The headers will improve this airflow throughout the entire rpm rangeadding more torque and horsepower. Don't let the fact that the iron GT40 heads have a larger exhaust valve fool you. Enter your search keyword. 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. He'd be the best source. 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. With gt40p heads and 289 hipo exhaust manifolds changing sparkplugs is the same as the original 302 heads and manifolds, I use the spark plugs that are recomended for the explorer with gt40p heads and you can use straight or angled boots. i've got a short block started, and i recently came across a set of GT40P heads for FREE ( love family members). 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. http://vb.foureyedpride.com/showthread.php?t=89153, http://www.facebook.com/groups/233213650060739/, 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 Anyways, I know the gt40ps will bump . 1986 Short block with notched pistons. 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. Depending on the Headers you have you might be okay. Joined: Sun Mar 15, 2009 9:31 am. this head fits years 95-01 explorer mountaineer mercury mountaineer . Test 3: Installed the larger Lunati camagain, no other changes. For the most part 302 heads and 351W heads are the same. I have a very good running stock 1981 302 in a F100 short box. Mustang Cylinder Head & Camshaft Guide (79-95) - LMR You can find them on later model Mercury Mountaineers and several other Ford SUV applications. Motor is going into a Ranger. I had those on my car before I upgraded and they were nice heads. But the part about a cam replacement possibly being a labor intensive undertaking is correct. 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:?:!?!?!? Ask Away! with Jeff Smith: Camshaft and Cylinder Head Recommendations No-option stripper- I like strippers. Do not ever, ever think about using the tube type manifolds. 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? I got lucky and found a complete Explorer GT40P engine online. With nitrous, this is easily a mid-11-second ride. Thank You. GT-40P Heads - 5.0 Mustang & Super Fords Magazine - MotorTrend FULL DYNO RESULTS. No-option stripper- I like strippers. 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. Posted on May 07, 2014 by promarengine. (its not their engine) If you can find individual flanged headers like the obsolete MAC headers had, those worked really well with GT40P's. Check my post above. The multiple-layer steel construction allows the gasket to conform to movement between the cylinder head and block while maintaining a good seal. Yea. A COMP hydraulic roller cam we found works well with this combination. bmcdaniel, Feb 17, 2004 #7. v8maverick Member. Ford Factory 5.0 Performance Cylinder Heads. Because of this, your tuneup will probably need to be modified. Buy the lifters for peace of mind now and hopefully for the duration. well i finally did my first ever carb build, ive always been an EFI guy Black 1985 GT: 408w, in the 6's in the 1/8 mile. Depends on the budget. $139.99. This will keep you from dropping your overall static compression ratio and losing power. Start with any 302 block, but try to find one from 1985 and up since it will already have provisions for a roller camshaft. You can use the stock roller lifters with any size cam you want. On the power side, we selected 400 hp as an impressive but reasonable output for our small-block 5.0L Ford. 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. 302 heads on 351w | ClassicBroncos.com Forum Fastest e303 5.0l's? - FourEyedPride.com We turned to Rare Auto Design in Orlando for dyno tests to find out how much horsepower we gained. Even with a stock Mustang 5.0 cam makes good power. Beyond the engine's amazingly good appearance, Moore had a couple of good reasons for choosing this engine. Just make sure it is a roller cam. 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. 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. We know what you're thinking--only two-tenths from an extra 45 hp? For all of us interested in Gt40p heads. Many years ago, a friend bought a used 2001 Mercury Mountaineer 5.0L that was equipped with a set of really decent GT40P style iron heads. Upgrading Fox Body Cylinder Heads - AmericanMuscle.com Cloudflare Ray ID: 7a2e2d95dedea1e4 These engines came with the GT40P head, which even with its small valves, offers really good performance. Good on ya Jeff Smith. This time around, we chose a shining example of this junkyard art form. A forum community dedicated to Ford Mustang owners and enthusiasts. The Fora platform includes forum software by XenForo. That carbureted GT40P motor made 465 on th engine dyno with a .500" 239/244 camshaft, Holley 650 carb and Weiand Stealth intake. This modification will help your late-model GT40P heads work better with the old-school carbureted intake setup. GT40 Heads On A 289? | Ford Muscle Cars Tech Forum Richard Rowe has been writing professionally since 2007, specializing in automotive topics. Calculating pushrod length 99 Explorer engine (302) with GT40P heads - Ford Muscle Cars Tech Forum Yea. This is what I recommend to everyone who is doing a budget 5.0 build. Going from your heads to the GT40p heads will bump your compression by about a point.so hello bottom end torque. Step 2. GT40, GT40P, would be great factory heads. If you have a early 351W ie pre 76 it probably . HAD '82 GT monochromatic (red).black cloth HAVE I can tell you that with my 9.503 block, 22cc dished pistons and 64cc heads, I'm at 9.5:1 compression. 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. 02-11-2012, 07:16 PM #6 fiveoh 86lx 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. Well also assume that this engine is running stock exhaust manifolds. So . 302 GT40 Dyno Results - FourEyedPride.com Is asking advice for a fairly common situation involving parts with mandatory compatibility between the two for performance and longevity. GT40P heads, what kind of performance do they give? - FourEyedPride.com I'm using the Trick Flow stage 1 cam with 1.7 roller rockers. All this is worth it. Just got through porting one of my gt40p heads today. 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. 1979 Indy 500 Pace Car. I used Lightning heads on my 302, (GT40 not P) with stock rockers on a flat tappet engine. FORD GT40p 4 BAR HEADS IN GOOD CONDITION w/ONE BOLT BROKEN 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.

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