302 with gt40p heads horsepower

Free shipping for many products! ported GT-40p, ported cobra intake, 65mm BBK, e-cam with 1.7s, longtubes, off-road x-pipe with flowmasters dumped. bmcdaniel, Feb 17, 2004 #7. v8maverick Member. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. You didnt mention what camshaft you would be choosing or exactly which 5.0L Ford Windsor engine you are working with. $139.99. And remember ENGINES have been being built/rebuilt/modified for years. are you twisted331 also? Good Luck. These engines came with the GT40P head, which even with its small valves, offers really good performance. FORD GT40p 4 BAR HEADS IN GOOD CONDITION . You can email the site owner to let them know you were blocked. I spin it to 6500 and thats about it. I'm using the Trick Flow stage 1 cam with 1.7 roller rockers. 1.7 shaft rockers and beehives. Ford's seminal 302 engine (later re-dubbed the 5.0) has been popular with budget-minded hot rodders for decades. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. Free shipping. I'd much rather be able to drive it at 8 or 9/10s of what it can handle. 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. You can have your current 28 oz rebalanced to 50. If you have a early 351W ie pre 76 it probably . This modification will help your late-model GT40P heads work better with the old-school carbureted intake setup. The GT40P cylinder heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. Add a distributor designed for a carbureted 302 but make sure to install the correct distributor gear for your cam. Nice to see actual dyno results instead of "butt dyno" guesses. The longer duration created a slight loss of torque below 3,300 rpm compared to both previous cams, but beyond that mild loss of power, the bigger Voodo out-powered its smaller cousin, cranking out a peak torque of 355 lb-ft at 4,300 (a gain of 7 lb-ft over Test 2) and charging to a peak horsepower of 376 at 6,000 rpm. So I've got the motor and heads already for my maverick project. Smith began writing for Car Craft magazine in 1979 and became editor in 1984. I must agree with Jeff Smith. If we subtract the 20 hp that the fan is worth, we end up with a gain of 25 hp. Win or lose, if you buy the ticket you must take the ride. The engine was only rated at 215 hp, but it at least had 9.0:1 compression. Its funny no one mentioned anything about ignition timing or components, Your email address will not be published. (Image/Harrison Creamery). Rowe studied engineering, philosophy and American literature at Central Florida Community College. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. Assuming this will be a daily driver engine, a short duration camshaft, especially when combined with a four-barrel dual plane intake manifold and headers, will deliver extremely snappy throttle response and the whole combination will increase the torque and peak horsepower by somewhere in the neighborhood of 20 to perhaps 35 horsepower. Once the headers are in place, then you can consider if you still want more power. The heads also required some machine work, including screw-in studs, guideplates, and widening the spring pockets for bigger valvesprings. ***Most important is theStupid question is the one that was never asked!*** Tim's junkyard refugee survived the beating and we had a bitchin' story. Test 2: Changed to the smaller of the two Lunati camshaftsno other changes. 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. 1983 Mustang G.T. They almost seem like flywheel numbers rather than RWHP numbers. Calculated compression to 9.8:1. The only one that's close, is #7. 69.90.139.244 Once you get into the FoMoCo aftermarket aluminum GT40s though, all bets are off. Not sure how they would mate up to your existing exhuast, but otherwise they should work. fordfan289, Aug 27, 2011 Those are really good numbers. The only way to really make more power is to go with a stroker kit, blower and/or heads. It's an 86 roller 5.0 engine that had a recent rebuild sometime in the past with keith black pistons, otherwise stock. These timeslips are from 1280' above sea level. For a better experience, please enable JavaScript in your browser before proceeding. I have a 66 mustang with its original untouched 289 with over 140 k on it that Ive been running a blow thru turbo making 14 lbs of boost on for the last 5 years and its never given me a problem. The MPH was there to run a little better but the local track is about terrible. Because of this, your tuneup will probably need to be modified. 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 . PTP Engineering front suspension and 25540R17s all around. The 302 uses smaller 7/16" head bolts and your "P" heads may or may not require the step washers. This time around, we chose a shining example of this junkyard art form. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. i've got a short block started, and i recently came across a set of GT40P heads for FREE ( love family members). Here is the lowdown on exhaust manifolds and VALVE SPRINGS. GT40, GT40P, would be great factory heads. I am very happy too. how much HP and torque? Building a 302-inch small-block to produce 400 hp is really no big deal, but doing. Long tube headers are a terrific idea, but you need to open up the exhaust side. We did the installation at Holten's place of employment, Motorworks, in Longwood, Florida. Holten tells us removing the fan is worth two-tenths in itself, which tells us the fan soaks up roughly 20 hp. They are more expensive than standard head gaskets, but they also do the job and are worth the additional money. 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. Let us explain. As noted, this is looking like hes building a 351 Lightning truck motor, which is a good way to go. +1 I would go with the regular GT40 heads. FULL DYNO RESULTS. It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. The spark plug issue is almost a non-issue. Is asking advice for a fairly common situation involving parts with mandatory compatibility between the two for performance and longevity. Boy, were we surprised with the results. REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS. If you're running a stock cam, 1.7 rockers will work perfectly. 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. Im a different animal. 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. The GTp heads are like GT 40's with smaller combustion chambers and the spark plugs are relocated for a more efficient burn. $930.00 + $55.00 shipping. Assorted screwdrivers, pliers and vise-grips. Last Edit: January 18, 2015, 12:05:31 pm by businesstrader Logged shaunp. This website is using a security service to protect itself from online attacks. We are offering a pair of original Ford Cobra 5.0 GT40 cast iron cylinder heads. fuel injection system . I have a very good running stock 1981 302 in a F100 short box. Start with any 302 block, but try to find one from 1985 and up since it will already have provisions for a roller camshaft. MAC is the only manufacturer of these headers, and the parts we installed fit like a glove with no problems whatsoever. Most of them are aware of what changes need to be completed. Calculating pushrod length that is a healthy budget deal. You gave me the info I was looking for, and I really do appreciate it. If I get different urges later, Ill pursue those then. 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'm an old school guy (289 in 65 mustang), and I'm just looking into the new 5.0 engine (roller cam) stuff recently. T5 with 3.73s. Slover primarily focused on the exhaust side of the GT40P heads. The GT40 & GT40P heads had a few differences that are note-worthy, the most importantly being the bump in compression. If you wanted to make your engine feel strong, these would be a decent investment, but they will require some modifications. Click to reveal You can have your current 28 oz rebalanced to 50. No-option stripper- I like strippers. We gained 45 hp and 40 lb-ft of torque. Motor is going into a Ranger. They also have emissions legal heads as well. Can I run the new cam with the same roller hydraulic lifters or do I have to change the lifters too? Scorpion 1.6 roller rockers. 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. 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. GT40P heads, what kind of performance do they give? I have a 5.0 from a 1992 Mustang in my 65. Overview. For the first test, we were reusing the stock Explorer cam, so the engine didn't need any break-in time. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. OR you could put your automotive journalistic skills in motion by reporting on the many new modern components available for the latest generation 351 Cleveland. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. I've not seen a set of longtubes that have an issue with GT40P's, either. A forum community dedicated to Ford performance owners and enthusiasts. Now we know why Dennis Hilliard of Central Coast Mustang is so high on these heads. 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. 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. We've already been motivated to put this engine in a buddy's Mustang. Install a "wet" nitrous plate system (which carries both nitrous and fuel) onto the intake manifold and jet it conservatively for a 100 horsepower shot. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. The rest went very smoothly, and we reused the stock lifters and suffered no ulcers worrying about breaking in the cam. Mac and Ford Motorsport both make a GT40P spacific header. Both have very similar valve sizes, but the GT40P head has slightly larger combustion chambers for a small bump in compression and better flow. 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. These cast piston short-blocks are not quite as good as the forged piston 5.0L that came in Fox-body Mustangs, but the GT40P heads flow much better than earlier 5.0L heads. If this is beyond your technical ability, you could ask a local machine shop to perform the modifications. I love my setup and it is very strong engine. There are too many variables to add to this regarding aftermarket stroker kits or components. Not bad for off the shelf parts and a stock shortblock. The HP DIFF column on the far right lists the horsepower difference between Test 1 and Test 3. Ha! P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. 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. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. For a better experience, please enable JavaScript in your browser before proceeding. The asterisk HP differences are calculated using Test 1's 294-hp peak. I view the GT40P heads similar to Granada brakes. 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 one added another 10 degrees of duration over the smaller Voodoo cam, along with 0.020 inch more intake valve lift. the springs are new stock oem ford. There is a better way. 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. Depends on the budget. A forum community dedicated to vintage Ford Mustang owners and enthusiasts. Performance & security by Cloudflare. . Step 2. I used Lightning heads on my 302, (GT40 not P) with stock rockers on a flat tappet engine. Yeah, out of a bolt on upgrade, you'd probably be looking at 260-280rwhp ish with supporting mods. Posted on May 07, 2014 by promarengine. Aside from the cost of the nitrous itself, this setup should cost you little more than a stock rebuild using all brand new parts. Yes Mr.Smith, your column here at OAC adorned with extreme performance without power adders, or all Engine as its known, from a superior pushrod Small Block featuring almost all USA sourced modern components with the familiar smell of Ford Blue. Theres many options available for a little more power. 68stang351 Founding Member May 16, 2002 850 I have to agree, the GT40P heads flow better than the GT40 iron heads. Also, the spark plug angle makes it a pain. The hardest part of swapping the cam was just getting the timing cover off and back on again. Early Windsors tend to have fairly restrictive exhaust manifolds, making the addition of a set of headers that much more efficient. With. #3::: Do your homework,get quality parts,dont skimp. Advanced: Daily Deals; Help & Contact; Sell; My eBay Expand My . 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. They were located in Tahachapi CA, and were sold with upgraded springs for $650.00, back in 2002-2003 ish. However I think the opportunity window is slowly closing. These are among the best of the iron Ford Windsor heads as they tend to flow much better than earlier castings. I have managed to get 402 horse power from a 289 hipo natural aspirated. A trip to Orlando Speed World provided us with updated quarter-mile times. I've got gt40p heads for it I'll be running, and can't afford better . Test 3: Installed the larger Lunati camagain, no other changes. Someone does make the Tri-Y's headers for the early Mustangs using the "P" heads. 97% Positive Feedback . Here a comparison of different heads on a 302: I'm very happy with my GT40P. As with all head installations, check piston-to-valve clearance before final startup. (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. That carbureted GT40P motor made 465 on th engine dyno with a .500" 239/244 camshaft, Holley 650 carb and Weiand Stealth intake. 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. 1986 Short block with notched pistons. Torque on the other hand isnt something to write home about. In less than an hour, we were ready to test. Ford offered a performance head that was a stock part on 1993-1995 Mustang Cobra models and pre- 1997-1/2 Ford Explorers and Mercury Mountaineers equipped with the 5.0 L engine called the GT-40 head (casting ID F3ZE-AA). 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. We will go into more detail on the head mods in a later story in Junkyard Builder, so watch for it. Shop by category. 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. 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. Manual trans. The GT40P heads flow a lot better than stock 351 heads. This is the main reason why these engines are not modified as much as the small block Chevy. The cost of a new set of standard replacement roller lifters is very affordable at major retailers like Summit. We probably could have coaxed an even 300 hp out of this stock configuration, but with such good numbers, we decided to jump right into the first Lunati cam. 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. Stock 1989 5.0L HO pistons will work if you can find them. I plan on running a AFM b31 cam too which has relatively small duration for the intake valve. 1 - 7 of 7 Posts. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. Everything fits, use the stock rockers and pushrods. Compare. And agree the cams do help and a few tricks with the heads that I have discovered really make a difference. United Engine and Machine sells cheap but decent pistons that will do what you're wanting. 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. I'm new and I'm 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. Late-model ford GT40 and GT40P heads with 1.84-inch intake valves will also flow 185 cfm at 0.50 . Headers and a camshaft will help but the engine really needs aftermarket 3/8 inch connecting rod bolts and aftermarket cylinder heads. Joined . The gt40p head is considered the best OEM 302 head made. A mild porting with gasket matching will be very good. 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. 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. Choose a cylinder head before you install the pistons. These are some of the pictures I have showing the Explorer manifolds. For a better experience, please enable JavaScript in your browser before proceeding. If you're going to use the stock 289 heads, install 1.84-inch intake valves, then port the intake and exhaust; these mods will net you about 185 cfm of intake port flow at 0.50 lift. If I remember right, non of the GT40P's (later models) had the thermactor smog provisions. 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. 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. Not looking for crazy HP. i'd love to use these heads,. The headers will improve this airflow throughout the entire rpm rangeadding more torque and horsepower. All manufactured using advanced CNC technology for the extreme durability and precision required of the modern canted valve Ford Small Block at power levels around the 1000 mark reached during recent competitions at the EMC and at the strip. Some ideas never go out of style. Im now thinking of adding a cam to match the carb. How to Build a Budget 383 Stroker Chevy How do I Increase Horsepower on a 440 Cylinder Head Specifications for a 1969 How to Get More Power Out of a 92 4.3 dragster engine image by Robert Young from, Copyright 2023 Leaf Group Ltd. / Leaf Group Media. 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. Per a UEM tech support email I have the Icon IC736 is supposed to be good for GT40 heads when I asked about it. . I need that part number too! Check my post above. Obviously, tuneups will vary. However, stepping up in the performance head market will set you back more than $1,200 for a decent pair of aluminum castings--and that's straight out of the box, with no porting. This is what I recommend to everyone who is doing a budget 5.0 build. 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. i have a 302 engine from a 1977 granada and i am wondering if gt40p heads from an explorer will fit on this motor. $169.50. 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. Enter your search keyword. This will follow the guideline of a 1.6 rocker baseline and factory bottom end 79-95 related 5.0L Mustangs only. 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. But the part about a cam replacement possibly being a labor intensive undertaking is correct. Eldelbrocks Air Gap intake manifold should work well with the combination. Yeah, except those. a) ain't early and b) aren't 289 heads. I can tell you that with my 9.503 block, 22cc dished pistons and 64cc heads, I'm at 9.5:1 compression. Aftermarket headers, such as those made by Hooker, BBK and Competition Engineering, are better and are just as easy, if somewhat more expensive, to procure used. That's more than enough to feed a power-brake booster. AFR 165 Heads | Have options for pedestal mounted rocker arms or stud mounted rocker arms. The "P" heads flow better. 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). 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. The older pushrod engines just dont offer the same kind of power potential for their displacement and it all has to do with cylinder head flow. Here is my setup. Where they differ is the combustion chamber size. Along with the heads, we used MAC headers for GT-40P heads. I got lucky and found a complete Explorer GT40P engine online. You didnt mention which cam you had in mind. I have a 432 HP non Hi Po 289 I built. This is a common mistake with first-time cam buyers who dont necessarily appreciate that the cam is just one component of the overall engine package. If you dont feel comfortable doing this higher a pro. These heads have been remanufactured using refaced reclaimed Factory Valves. This will keep you from dropping your overall static compression ratio and losing power. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. That's an improvement of 22 hp over Test 2. 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. 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. Holley 670 street avenger carb. LOW-BUCK 302 FORD HEAD UPGRADE Richard Holdener 239K subscribers 189K views 2 years ago WESTECH PERFORMANCE GROUP WHAT'S IT WORTH? When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more! On the power side, we selected 400 hp as an impressive but reasonable output for our small-block 5.0L Ford. The heads that were used were also old C8 casting with 58cc chambers. With the P-heads requiring pedestal-mount rockers, we also called up Crane Cams for a set of 1.6 pedestal-mount roller rockers. The GT40P heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. Instructions on porting the GT-40p heads here. We've seen what happens from previous Ford experience when power levels above 500 hp tend to either pop head gaskets or saw blocks in half. This pushed that little Ford to a peak horsepower of 503, and that was where we stopped. After a couple grand you have a killer set of heads, but there's got to be a less-expensive way of making horsepower. by travis Sun May 03, 2020 8:33 am. 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. I'm sure the dyno operator used some goofball correction factor to make the numbers look higher. I have a 302 Windsor V8 EFI engine that I converted to a 600 cfm carburetor with a Street Warrior intake manifold. If you smooth out the bowls and exhaust ports and gasket match the intakes they should flow decent. Build Thread 1965 Fastback Project "Racesteed". Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. In 1987, he assumed the role of editor for Hot Rod magazine before returning to his first love of writing technical stories. A forum community dedicated to Ford Mustang owners and enthusiasts. I bought a crate 302 from Downs Ford a few years ago that was producing 320 hp. All costing in the end at least another $2k. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. Never not once have I ever seen a SBF rod bolt create a failure. Gasoline/Diesel all makes on earth & still doing it today with great pride.Feel free to contact me anytime. Keywords Not sure about that but got some pictures of the cast iron explorer manifolds on a 302. What did the heads flow? AFR 165cc 58cc Heads. 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. I'm wondering how these heads will interact with the paxton 1220 sl supercharger I'm trying to put on. 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. Well also assume that this engine is running stock exhaust manifolds. The car weighs #2835 with driver. Small Block Ford 289/302/5.0L/351w 180cc/60cc Aluminum Cylinder Head E42004. Not to mention, they will run circles around GT40P's out of the box. 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. They suffered from poor aftermarket support up until about 15 years ago when it really came on strong. Holten runs the factory fan, but he had removed it when he ran the 12.63. If they are cheap enough, take them anyway. The Fora platform includes forum software by XenForo. The question was whether we wanted a torquey small-block or a more cammed-up rpm engine to boost peak horsepower. 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 SBF OEM | eBay Motors, Parts & Accessories, Car & Truck Parts & Accessories | eBay! Well offer one as an example. You need to check. (its not their engine) Purchase any used aftermarket manifold for the 302 that is designed to function in the 3,500 to 6,500 power band. He'd be the best source. Generally expect with a good cam, intake, roller rockers and a good ignition system to see around 300-350 max rear wheel horsepower, depending on what type of dyno you use. .. i would not buy valves unless you need them amd would not switch to studs with these heads for your low hp . Cloudflare Ray ID: 7a2e2d95dedea1e4 Gt40 heads/intake from a jy explorer, leave the . 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. 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! . Can anyone give me a little feedback about a '99 Explorer 5.0, and tell me if it's my answer. 68 XR7 & 68 M-100. Learn how your comment data is processed. We took the heads to Mike Slover of Slover's Porting Service in Sun Valley, California, to do this work, plus some basic pocket-porting to improve flowespecially on the exhaust side. harvard plastic surgery resident death, crypto com address verification failed, port huron obituaries,