302 with gt40p heads horsepower

I guess I had it backwards, sorry about that, didn't mean to spread misinformation. Consider having the head's intake ports matched to the intake manifold gasket. 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. This one added another 10 degrees of duration over the smaller Voodoo cam, along with 0.020 inch more intake valve lift. However, when we dyno'd the car before installing the GT-40P heads, the fan was on the car. I wouldnt recommend reusing lifters though. 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. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. Can I run the new cam with the same roller hydraulic lifters or do I have to change the lifters too? Yep my **** is coming apart again Isnt life great! I spin it to 6500 and thats about it. 68stang351 Founding Member May 16, 2002 850 This is needed for the steel roller cam. If you go with a diffrent cam, make sure you change springs, The Trick Flow kit comes with everything for around $130. If you smooth out the bowls and exhaust ports and gasket match the intakes they should flow decent. Ive been building ENGINES for 40+ years. Good on ya Jeff Smith. The 302 uses smaller 7/16" head bolts and your "P" heads may or may not require the step washers. The Edelbrock Performer RPM is a good choice, but Holley, Weiand and Ford Motorsport also have similar offerings. This combination should be good for about 400 horsepower and as much as 500 if you opt to use the stronger aftermarket pistons. I used Lightning heads on my 302, (GT40 not P) with stock rockers on a flat tappet engine. Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more! I have a 432 HP non Hi Po 289 I built. 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. Note the head bolt hole issue, some GT40 iron heads had 1/2 holes, if not they will need to be enlarged. This engine will be good for your 65 Mustang. 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. He'd be the best source. Aside from the cost of the nitrous itself, this setup should cost you little more than a stock rebuild using all brand new parts. I can tell you that with my 9.503 block, 22cc dished pistons and 64cc heads, I'm at 9.5:1 compression. That's an improvement of 22 hp over Test 2. We decided on a Powerstar kit from Nitrous Supply, owned by our good friend Mike Thermos, who was one of the original nitrous kit suppliers back in the early '80s. Stock valve sizes? 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. The '00 Ford Explorers and Mercury Moutaineers were factory equipped with one of Ford's better 5.0L motors. REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS | What's New For this reason, we're not sure what kind of boost the GT-40P heads will give. Step 1. Thank You. The GTp heads are like GT 40's with smaller combustion chambers and the spark plugs are relocated for a more efficient burn. I'm also have the regular GT40 heads on my current build. ***Most important is theStupid question is the one that was never asked!*** GT-40P Heads - 5.0 Mustang & Super Fords Magazine - MotorTrend When you purchase through links on our site, we may earn an affiliate commission, which supports our community. If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. You might even say its like flogging a dead horse without any animals actually being injured during my moments of sarcasm. 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. Runs well. You can use the stock roller lifters with any size cam you want. 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. Holten runs the factory fan, but he had removed it when he ran the 12.63. gt40p heads on a 289 in a 66 | Vintage Mustang Forums The reply has so many assumptions that I cant even assume to know the answer. I added a link to it. Gt40p heads - FourEyedPride.com I view the GT40P heads similar to Granada brakes. Gt40 heads/intake from a jy explorer, leave the . *** 65 Mustang 351C 4v, AOD, 4.11 gears *** 66 Galaxie convert big block. Junkyard Gt40p Heads-add 30+ Hp to Your 5.0l (For Free?) Dyno results GT40P heads | Vintage Mustang Forums Perhaps even more surprising was how well this engine idled, calmly purring with 16 inches of manifold vacuum at 980 rpm. Check my post above. Along with the heads, we used MAC headers for GT-40P heads. 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? The multiple-layer steel construction allows the gasket to conform to movement between the cylinder head and block while maintaining a good seal. LOW-BUCK 302 FORD HEAD UPGRADE - YouTube 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. If you're not a header kind of guy, the repro 289 HIPO manifolds bolt up to the GT40P heads with plenty of spark plug room. For a better experience, please enable JavaScript in your browser before proceeding. PTP Engineering front suspension and 25540R17s all around. GT-40 heads HP increase | Mustang Forums at StangNet Really hurt too. Win or lose, if you buy the ticket you must take the ride. After we installed the heads and with the fan off, he ran a 12.46 at 107.9. The 2 heads are about the same when looking at the numbers with the GT40p heads having a slight edge. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. 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. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Joined: Sun Mar 15, 2009 9:31 am. Im a different animal. All Ford Mustangs | Model Specific Forums, GT-40P Heads - 5.0 Mustang & Super Fords Magazine. What you are trying to do is to increase the amount of airflow through the engine in order to make more power. The newer camshaft is designed for use with a soft bronze distributor gear, not the hardened steel gear used for older camshafts. I have a 5.0 from a 1992 Mustang in my 65. made more power everytwhere and 40 hp is respectable. GT40P Heads how much hp from them. - StangNet 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. 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. This time around, we chose a shining example of this junkyard art form. check out the. by travis Sun May 03, 2020 8:33 am. You can have your current 28 oz rebalanced to 50. I'd much rather be able to drive it at 8 or 9/10s of what it can handle. You keep stock drivability, and stock gas milage if you can stay out of boost. #2::: Get advice from a reptile engine builder with experience(first flag for me is when somebody refers to an ENGINE as a MOTOR! The cost of a new set of standard replacement roller lifters is very affordable at major retailers like Summit. While the heads were off getting a massage, we turned our attention to the cam timing. Instructions on porting the GT-40p heads here. Free shipping. This 1979-1995 Mustang cylinder head and camshaft guide will overview the heads and cams we offer and how they will coincide. Take the assembly to a machine shop to have it balanced and install it in the block. 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. Your IP: Over $2050 for the 165/185 renegades. Features hardened 4140 Chromoly retainers, valve locks, spring shims, a spring height gauge, valve seals, and instructions. Stock 1989 5.0L HO pistons will work if you can find them. 289 or 351 heads on a 302 advantage? | The H.A.M.B. Not when you can buy a set of Promaxx or AFR Enforcer heads for $1000, that already have decent hardware included. As with Chevrolet's small-block engine, the aftermarket has had dozens of years to expand the range and reduce the cost of the parts they offer for this engine. Buy the lifters for peace of mind now and hopefully for the duration. Torque on the other hand isnt something to write home about. 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. Both swaps made more sense when parts were readily available at the bone yard for cheap. Yea. These are some of the pictures I have showing the Explorer manifolds. Understanding Ford's Fox Body GT40 Cylinder Heads - CJ Pony Parts These engines came with the GT40P head, which even with its small valves, offers really good performance. Through Central Coast you can have the heads fully prepped for your combination. Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - anyone have experience with GT40P heads on a 92 351W - ive got a 92 F250 with a 351W that needs a pretty serious rebuild. If we subtract the 20 hp that the fan is worth, we end up with a gain of 25 hp. Shop by category. 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. The hardest part of swapping the cam was just getting the timing cover off and back on again. I got lucky and found a complete Explorer GT40P engine online. These heads have been remanufactured using refaced reclaimed Factory Valves. Anyways, I know the gt40ps will bump . ported GT-40p, ported cobra intake, 65mm BBK, e-cam with 1.7s, longtubes, off-road x-pipe with flowmasters dumped. I went to a couple in Tucson and almost all the Ford vehicles that came with a 5.0 had the heads missing. at the crank. Its NA but makes use of AFR heads and some other aftermarket goodies. 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. Save narve00 How to Build a Cheap Drag Racing 302 Ford Motor | It Still Runs The action you just performed triggered the security solution. Then why did you port the heads and how do you know if you made an improvement. I don't need tons of power to enjoy the car. The "P" heads flow better. These are among the best of the iron Ford Windsor heads as they tend to flow much better than earlier castings. This test went so well that we were eager to see what the slightly bigger cam would do. All this is worth it. are you twisted331 also? Not sure about that but got some pictures of the cast iron explorer manifolds on a 302. For a better experience, please enable JavaScript in your browser before proceeding. I guess someone could just do a basic valve job and throw on the GT40 upper/lower intake for a cheap HP boost. At the dragstrip, we gained two-tenths and 2 mph. 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 GT 500; Posts: 8496; Location: Brisbane . With. Depends on the budget. (Image/Harrison Creamery). We set the timing to 34 degrees and rejetted the carburetor to get our desired 12.5:1 air/fuel ratio. So I've got the motor and heads already for my maverick project. It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. Because of this, your tuneup will probably need to be modified. Let us explain. Some ideas never go out of style. Richard Rowe has been writing professionally since 2007, specializing in automotive topics. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. 1986 Short block with notched pistons. the springs are new stock oem ford. Compare. Fastest e303 5.0l's? - FourEyedPride.com bmcdaniel, Feb 17, 2004 #7. v8maverick Member. One benefit gt40P head will have over other 80's-90's model heads, including the gt40 head, is that it has a smaller combustion chamber much like the original 289 heads. And remember ENGINES have been being built/rebuilt/modified for years. A forum community dedicated to Ford Mustang owners and enthusiasts. If this is beyond your technical ability, you could ask a local machine shop to perform the modifications. In mid-1997, the Explorer and Mountaineer 5.0 L heads were revised and renamed . 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. THANKS VERY MUCH! Mac and Ford Motorsport both make a GT40P spacific header. 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. The GT40P heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. Calculating pushrod length Central Coast Mustang sells GT-40P heads at a great price, making them a viable alternative in a market flooded with performance head choices. I had a set of 69 302 heads I ran for a while . Weiand 7515 xcellerator intake. 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. GT40 Heads On A 289? | Ford Muscle Cars Tech Forum Get 500 Horsepower from a Junkyard Ford Explorer 302 - MotorTrend A solid 300-325 hp should be plenty and that's with good drivability and reliability as well. There are too many variables to add to this regarding aftermarket stroker kits or components. Even with relatively small valve sizes of 1.85-inch intake and 1.46-inch exhaust, the P-heads flow much better than previous. I'd get the gt40 setup, and put an s trim on it. 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. Those heads were unported and had stock valve sizes! The Fora platform includes forum software by XenForo. timing and compression ratio with gt40p heads - Modded Mustang Forums He'll have to get a gear for his distributor. 68 XR7 & 68 M-100. i'd love to use these heads,. 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. The GT40 heads are a bit more versatile, working with the 5.4 and 6.8, while the GT40P (Explorer/Mountaineer) heads will only work on the 6.8 due to an interference issue. Boy, were we surprised with the results. I recall having an absolute blast with my old K-code coupe back in the day. Here is the lowdown on exhaust manifolds and VALVE SPRINGS. Be careful, I was once bitten by one of those reptile engine builders. The HP DIFF column on the far right lists the horsepower difference between Test 1 and Test 3. Nudge us with emails, and we'll make it happen. AFR 165cc 58cc Heads. The heads that were used were also old C8 casting with 58cc chambers. Both have very similar valve sizes, but the GT40P head has slightly larger combustion chambers for a small bump in compression and better flow. I was looking at putting on the GT40P heads on. The factory heads have a boss for the exhaust valve that restricts flow through the exhaust port. The gt40p head is considered the best OEM 302 head made. Add 40 to 70 HP to your 302 yourself - Factory Five Racing Forum Since the engine is nearly stock, we would want to choose a relatively mild camshaft with somewhat more lift and duration than stock, but again not going too aggressive. For a better experience, please enable JavaScript in your browser before proceeding. Rowe studied engineering, philosophy and American literature at Central Florida Community College. 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. 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. We didn't increase the valve size, although we did have to add Manley valves to get the proper spring-installed height. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 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:?:!?!?!? Dennis Hilliard of Central Coast says we can expect to gain three-tenths in the quarter-mile. +1 I would go with the regular GT40 heads. JavaScript is disabled. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. 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. You didnt mention which cam you had in mind. What Cam and Springs to Use for GT40 Heads that is a healthy budget deal. Choose a cylinder head before you install the pistons. 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. Can anyone give me a little feedback about a '99 Explorer 5.0, and tell me if it's my answer. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. Their weak point is that the rotator used on the exhaust valve is very thick. A LOT of them do it these days. There are a couple of reasons for this suggestion. The tube headers showed a gain of almost 100 hp! I am very happy too. Cast iron GT40Ps as cast flow better than non-Ps due to revised plug location/angle. 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. United Engine and Machine sells cheap but decent pistons that will do what you're wanting. Keep in mind that swapping camshafts is a fairly extensive effort. T5z and 3.89 9" TL rear. They almost seem like flywheel numbers rather than RWHP numbers. SB Ford, GT40 .575" Lift Max Output II Drop in Valve Spring Kit, Hyd Roller, 140 Lb Seat. When compared to the new generation of performance engines on the market today like the 5.0L DOHC Coyote engine, your engine will not come close. 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 . Required fields are marked *. Pretty sure that was name, but I could be wrong. 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. However, theres a distinct possibility that I might pull all of my hair out if I see another in-depth article explaining how I, along with just over a billion other desperate humans seeking answers, need special valve spring split locks for my next tired Chevy build. FULL DYNO RESULTS. . GT40P heads, what kind of performance do they give? - FourEyedPride.com You can have your current 28 oz rebalanced to 50. We did a quick search for hydraulic roller cams and landed on a COMP camshaft that looked promising. HiPo manifolds and Ill be good. Well offer one as an example. Everything fits, use the stock rockers and pushrods. 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 must agree with Jeff Smith. Building a 302-inch small-block to produce 400 hp is really no big deal, but doing.