Mustang Cylinder Head & Camshaft Guide (79-95) - LMR bmcdaniel, Feb 17, 2004 #7. v8maverick Member. 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 . The headers will improve this airflow throughout the entire rpm rangeadding more torque and horsepower. 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:?:!?!?!? how hard to put on? that is a healthy budget deal. 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. Good on ya Jeff Smith. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. We heated the bottle to 950 psi and hit the button at 4,500 rpm. The only failures Ive had were timing chains and a couple broken rods in a mid 80s 302 with 200,000 miles on it that got about 35 lbs of boost stuffed into it when a pop off valve I bought on ebay failed. If I remember right, non of the GT40P's (later models) had the thermactor smog provisions. As with all head installations, check piston-to-valve clearance before final startup. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. So . 402 HP NA from a HI PO 289 isnt that mysterious of a feat to accomplish with todays SBF Aftermarket parts availability. 1979 Indy 500 Pace Car. I got lucky and found a complete Explorer GT40P engine online. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 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. You might even say its like flogging a dead horse without any animals actually being injured during my moments of sarcasm. While the heads were off getting a massage, we turned our attention to the cam timing. 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. I had those on my car before I upgraded and they were nice heads. Dec 8, 2011. this is the price for one head. Gt40/gt40p Heads On A 351w Questions - StangNet Well assume it is a 5.0L with stock heads. Holten's best time is a 12.63 at 105.9 mph, and if we gain the desired result he will be right in the thick of things in Trophy Stock competition. Gasoline/Diesel all makes on earth & still doing it today with great pride.Feel free to contact me anytime. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more! I love my setup and it is very strong engine. Building a 302-inch small-block to produce 400 hp is really no big deal, but doing. If they are cheap enough, take them anyway. Install a Ford Motorsport E303, X303 or F303 cam, or any of the similar units from Indy, Lunati or your favorite manufacturer. Never not once have I ever seen a SBF rod bolt create a failure. Most of them are aware of what changes need to be completed. SB Ford GT40 Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. Save narve00 69.90.139.244 I'd much rather be able to drive it at 8 or 9/10s of what it can handle. Most of the time, GT-40 heads are worth a good 20-40hp over stock heads. This is what I recommend to everyone who is doing a budget 5.0 build. The HP DIFF column on the far right lists the horsepower difference between Test 1 and Test 3. Both swaps made more sense when parts were readily available at the bone yard for cheap. No-option stripper- I like strippers. Anyways, I know the gt40ps will bump . I have a 5.0 from a 1992 Mustang in my 65. This pushed that little Ford to a peak horsepower of 503, and that was where we stopped. Step 2. Car Craft mag. 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. GT40, GT40P, would be great factory heads. Everything fits, use the stock rockers and pushrods. 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. This 1979-1995 Mustang cylinder head and camshaft guide will overview the heads and cams we offer and how they will coincide. Ive been building ENGINES for 40+ years. After we installed the heads and with the fan off, he ran a 12.46 at 107.9. FORD GT40p 4 BAR HEADS IN GOOD CONDITION w/ONE BOLT BROKEN the springs are new stock oem ford. The "P" heads flow better. A forum community dedicated to vintage Ford Mustang owners and enthusiasts. Once the headers are in place, then you can consider if you still want more power. Don't let the fact that the iron GT40 heads have a larger exhaust valve fool you. I wouldnt recommend reusing lifters though. Choosing pistons to complement GT40P heads - MustangWorks.com I must agree with Jeff Smith. It turned out we were conservative on both counts. Gt40 heads/intake from a jy explorer, leave the . Their weak point is that the rotator used on the exhaust valve is very thick. just curious. 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. This is not a criticism but instead consider it to be more of a heads-up. The GT40P cylinder heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. Now he serves as a regular contributor to OnAllCylinders. 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. Well also assume that this engine is running stock exhaust manifolds. If the head bolt holes are 1/2" or slightly larger, ARP makes the washers and can be sourced from Ford Racing or ARP through a speed shop or Summit, Jegs and PAW among others. However there are plenty of factory heads that with the help of an experienced machine shop can be great. These are some of the pictures I have showing the Explorer manifolds. GT40P heads, what kind of performance do they give? I need that part number too! The reason for this is that we're actually replacing mildly worked E7TE heads. Ask Away! with Jeff Smith: Camshaft and Cylinder Head Recommendations You can email the site owner to let them know you were blocked. 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. I am very happy too. The entire front accessory drive and timing chain cover must be removed, along with the distributor and intake manifold. Also, the spark plug angle makes it a pain. 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? Just make sure it is a roller cam. 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. If you know him, ask him. That's a good combo in my book. Motor is going into a Ranger. Nice to see actual dyno results instead of "butt dyno" guesses. Ford Factory 5.0 Performance Cylinder Heads. 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. The MPH was there to run a little better but the local track is about terrible. Sponsored. Come join the discussion about popular models such as the Mustang, Galaxie, Falcon, Fairlane, Torino, Shelby and many more! GT40 Heads On A 289? | Ford Muscle Cars Tech Forum 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. We turned to Rare Auto Design in Orlando for dyno tests to find out how much horsepower we gained. This website is using a security service to protect itself from online attacks. I'd get the gt40 setup, and put an s trim on it. We didn't increase the valve size, although we did have to add Manley valves to get the proper spring-installed height. A solid 300-325 hp should be plenty and that's with good drivability and reliability as well. The Fora platform includes forum software by XenForo. FULL DYNO RESULTS. Not when you can buy a set of Promaxx or AFR Enforcer heads for $1000, that already have decent hardware included. 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. 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. 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. Shop by category. With no other changes we gained 25 hp using factory iron heads. I've got gt40p heads for it I'll be running, and can't afford better . With the P-heads requiring pedestal-mount rockers, we also called up Crane Cams for a set of 1.6 pedestal-mount roller rockers. Early Windsors tend to have fairly restrictive exhaust manifolds, making the addition of a set of headers that much more efficient. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. So I've got the motor and heads already for my maverick project. I have to agree, the GT40P heads flow better than the GT40 iron heads. I'm running BBK un-equal length shorty's, and I'm able to get all the plugs in, tight, and all plug wires on. But the part about a cam replacement possibly being a labor intensive undertaking is correct. Here a comparison of different heads on a 302: I'm very happy with my GT40P. In mid-1997, the Explorer and Mountaineer 5.0 L heads were revised and renamed . Is asking advice for a fairly common situation involving parts with mandatory compatibility between the two for performance and longevity. However I think the opportunity window is slowly closing. Vehicle: 1972 2 door 302 maverick, 1986 5.0 stang gt convertible,66 mustang coupe, HEMI ram. For 2018, the Coyote makes 460 hp. 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. This test went so well that we were eager to see what the slightly bigger cam would do. If you smooth out the bowls and exhaust ports and gasket match the intakes they should flow decent. Works on all factory cast iron E7, GT40, and GT40P cylinder heads! It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. The question was whether we wanted a torquey small-block or a more cammed-up rpm engine to boost peak horsepower. 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. We know what you're thinking--only two-tenths from an extra 45 hp? Required fields are marked *. 302HO with gt40p heads | Mustang Forums at StangNet Because of this, your tuneup will probably need to be modified. Speedmaster PCE281.2046 Small Block Ford Aluminum Cylinder Heads 62cc As usual, there is much more to this story. Mar 23, 2004. Not to mention, they will run circles around GT40P's out of the box. United Engine and Machine sells cheap but decent pistons that will do what you're wanting. . It runs smooth but seems lazy. Took me 7 hours to do one head.but they cleaned up real nice. Click to reveal VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 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. FORD GT40p 4 BAR HEADS IN GOOD CONDITION . Advanced: Daily Deals; Help & Contact; Sell; My eBay Expand My . What you are trying to do is to increase the amount of airflow through the engine in order to make more power. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Instructions on porting the GT-40p heads here. 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. For both the GT40 and GT40p heads, I STRONGLY suggest upgrading the valve springs. That's fantastic for the minimal investment we made. K.S. I got a GT40P off the assembly line years ago. Joined: Sun Mar 15, 2009 9:31 am. 1986 Short block with notched pistons. As a matter of fact, Central Coast has an '89 coupe with GT-40P heads that has run a best of 11.98 in the quarter-mile. I have a very good running stock 1981 302 in a F100 short box. i've got a short block started, and i recently came across a set of GT40P heads for FREE ( love family members). JEGS High Performance. Obviously, tuneups will vary. Manual trans. 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. We guarantee plenty of burnout action when you add GT-40P heads to your 5.0 Mustang. AFR 165 Heads | Have options for pedestal mounted rocker arms or stud mounted rocker arms. For those of you running a carb, or aftermarket intake, you already have a leg up in this area and should see even greater gains in power. Small-block Fords and Mopars only use four head bolts per cylinder, so retaining proper head-gasket sealespecially with nitrousis a point that demands attention, so we ordered a set of Fel-Pro MLS head gaskets rather than a standard, composition gasket. We gained 45 hp and 40 lb-ft of torque. Posted on May 07, 2014 by promarengine. With the tuning finalized, the little cam made far more power than we expected, cranking out 328 lb-ft of torque at 4,200 and 294 hp at 5,400 rpm. 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 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. #2::: Get advice from a reptile engine builder with experience(first flag for me is when somebody refers to an ENGINE as a MOTOR! 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. Do you guys have part numbers for the spring kits? $169.50. i know a guy who used to build race engines so he has all the right tools, how much would it help to get the heads ported and polished or anything else he could do to them. Ford 302W / 5.0L History & Specifications - The Ranger Station I recall having an absolute blast with my old K-code coupe back in the day. BONUS TEST-FOUR DIFFERENT 302 INTAKES.. 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! Yep my **** is coming apart again Isnt life great! This is a function of the somewhat wider lobe-separation angle of 112 degrees. Holten runs the factory fan, but he had removed it when he ran the 12.63. 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 rest went very smoothly, and we reused the stock lifters and suffered no ulcers worrying about breaking in the cam. Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! Because its all been done time after time after. Worst AFR 165 dyno ever | Factory Five Racing Forum Really hurt too. 68 XR7 & 68 M-100. With nitrous, this is easily a mid-11-second ride. Central Coast Mustang sells GT-40P heads at a great price, making them a viable alternative in a market flooded with performance head choices. 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. You didnt mention which cam you had in mind. This is the main reason why these engines are not modified as much as the small block Chevy. There's not a lot of reson to use 351 heads later than '75 since they essentially identical to 302 heads except for head bolt holes. Through Central Coast you can have the heads fully prepped for your combination. If you go with a diffrent cam, make sure you change springs, The Trick Flow kit comes with everything for around $130.