This is needed for the steel roller cam. i'd love to use these heads,. Gt40/gt40p Heads On A 351w Questions - StangNet Within a few hours of his discovery, the engine was sitting in the back of his truck on its way to a new home. The heads that were used were also old C8 casting with 58cc chambers. At the dragstrip, we gained two-tenths and 2 mph. PTP Engineering front suspension and 25540R17s all around. For real performance, stock E7TE heads leave a lot to be desired. And have discovered something that I dont think anyone else knows. These engines came with the GT40P head, which even with its small valves, offers really good performance. GT40Ps have 58cc. I'm running stock GT40 heads with stock 4.000 bore on cylinders and a Lunati cam with 256/262; Duration @ .050 (Int/Exh): 213/219; Gross Valve Lift (Int/Exh): .483/.499; LSA/ICL: 112/108. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Holley 670 street avenger carb. Those heads were unported and had stock valve sizes! 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. 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. built one using a 91' HO short block with a set of AFR 165 heads, Weiand . If you go with a diffrent cam, make sure you change springs, The Trick Flow kit comes with everything for around $130. So I've got the motor and heads already for my maverick project. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. HiPo manifolds and Ill be good. I got a GT40P off the assembly line years ago. 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. GT40P heads, 302 and Victor Jr. intake: - Factory Five Racing Forum Performance & security by Cloudflare. +1 I would go with the regular GT40 heads. 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. Despite adding 30 degrees of intake duration, this cam improved torque throughout the entire test from 3,000 rpm on up. If this is beyond your technical ability, you could ask a local machine shop to perform the modifications. I have to agree, the GT40P heads flow better than the GT40 iron heads. The spark plug issue is almost a non-issue. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. LOW-BUCK 302 FORD HEAD UPGRADE Richard Holdener 239K subscribers 189K views 2 years ago WESTECH PERFORMANCE GROUP WHAT'S IT WORTH? Both swaps made more sense when parts were readily available at the bone yard for cheap. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. That said there are some better aftermarket options for heads also. Weiand 7515 xcellerator intake. A solid 300-325 hp should be plenty and that's with good drivability and reliability as well. Ill do springs and a moderate cam and go for a good, dependable power plant. What Cam and Springs to Use for GT40 Heads Ford Explorer Mountaineer 5.0 Ohv Iron 302 Sbf Just make sure it is a roller cam. They work, but present their own challenges. A mild porting with gasket matching will be very good. Understanding Ford's Fox Body GT40 Cylinder Heads - CJ Pony Parts 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. Im now thinking of adding a cam to match the carb. This 1979-1995 Mustang cylinder head and camshaft guide will overview the heads and cams we offer and how they will coincide. SB Ford GT40P Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. how much HP and torque? The GT40P heads flow a lot better than stock 351 heads. That carbureted GT40P motor made 465 on th engine dyno with a .500" 239/244 camshaft, Holley 650 carb and Weiand Stealth intake. 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. 950.00 us a set and will ship . For a better experience, please enable JavaScript in your browser before proceeding. 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 am working on a set of iron GT40s hoping it goes faster. Cloudflare Ray ID: 7a2e2d95dedea1e4 The GT40P heads flow a lot better than stock 351 heads. Add 40 to 70 HP to your 302 yourself - Factory Five Racing Forum Through Central Coast you can have the heads fully prepped for your combination. The engine never huffed oil out of the breathers, and the spark plugs all looked excellent. The reason this new generation of Ford engines make a ton more power is they also enjoy fantastic cylinder heads and four valves per cylinder. Both have very similar valve sizes, but the GT40P head has slightly larger combustion chambers for a small bump in compression and better flow. A trip to Orlando Speed World provided us with updated quarter-mile times. 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. Obviously, tuneups will vary. Nice to see actual dyno results instead of "butt dyno" guesses. 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. Common sense would suggest that with the heavy lifting complete and the old cam removed, by not installing the new roller lifters along with the camshaft could be asking for the possibility of trouble just a few thousand miles down the road. Like I said lots of options. In addition, the cam timing was designed for torque, with duration somewhere around 190 degrees at 0.050 with roughly 0.450-inch lift. They suffered from poor aftermarket support up until about 15 years ago when it really came on strong. 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. You need to check. Going from your heads to the GT40p heads will bump your compression by about a point.so hello bottom end torque. I wouldnt recommend reusing lifters though. This pushed that little Ford to a peak horsepower of 503, and that was where we stopped. Those are really good numbers. We know what you're thinking--only two-tenths from an extra 45 hp? FORD, SMALL BLOCK 302 HO w/ E7, GT40P & GT40 - Alex's Parts Location: Re: Stock Ford 351W 4bbl dyno numbers. The Fora platform includes forum software by XenForo. It turned out we were conservative on both counts. Install a set of 1.7:1 roller-tipped rocker arms on the heads. this head is complete with new 1.837 int valves and 1.536 exhaust valves. Most of the time, GT-40 heads are worth a good 20-40hp over stock heads. Boy, were we surprised with the results. 302HO with gt40p heads | Mustang Forums at StangNet The heads also required some machine work, including screw-in studs, guideplates, and widening the spring pockets for bigger valvesprings. 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:?:!?!?!? These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. In a lightweight Fox or early Mustang with a five-speed behind it, this would be a great little street engine. A COMP hydraulic roller cam we found works well with this combination. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. Supercharging GT40p heads | Modded Mustang Forums K.S. BONUS TEST-FOUR DIFFERENT 302 INTAKES.. If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. You didnt mention which cam you had in mind. 1983 Mustang G.T. Long tube headers are a terrific idea, but you need to open up the exhaust side. 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. $930.00 + $55.00 shipping. According to his data and verified dyno tests with an EFI 302, you can go above this level if you port the stock, lower intake manifold, or upgrade it altogether. The GT40P heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. 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. A forum community dedicated to Ford performance owners and enthusiasts. GT40s have 64cc chambers. GT-40P Heads - 5.0 Mustang & Super Fords Magazine - MotorTrend just curious. Mar 23, 2004. MAC is the only manufacturer of these headers, and the parts we installed fit like a glove with no problems whatsoever. The GT40 & GT40P heads had a few differences that are note-worthy, the most importantly being the bump in compression. The cost of a new set of standard replacement roller lifters is very affordable at major retailers like Summit. They fill that spot between power and budget. 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. 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. For a better experience, please enable JavaScript in your browser before proceeding. 99 Explorer engine (302) with GT40P heads - Ford Muscle Cars Tech Forum . Smith began writing for Car Craft magazine in 1979 and became editor in 1984. JavaScript is disabled. Choose a cylinder head before you install the pistons. Late-model ford GT40 and GT40P heads with 1.84-inch intake valves will also flow 185 cfm at 0.50 . If they are cheap enough, take them anyway. Along with the heads, we used MAC headers for GT-40P heads. The Fora platform includes forum software by XenForo. I need that part number too! The question was whether we wanted a torquey small-block or a more cammed-up rpm engine to boost peak horsepower. 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. The newer camshaft is designed for use with a soft bronze distributor gear, not the hardened steel gear used for older camshafts. You gave me the info I was looking for, and I really do appreciate it. This combination should be good for about 400 horsepower and as much as 500 if you opt to use the stronger aftermarket pistons. #3::: Do your homework,get quality parts,dont skimp. With the engine reassembled, we boxed up our second camshaft and headed for Westech's dyno. Install a set of 1.7:1 roller-tipped rocker arms on the heads. I got rid of the carburetor and went with a F.A.S.T. Runs well. The GTp heads are like GT 40's with smaller combustion chambers and the spark plugs are relocated for a more efficient burn. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. I recall having an absolute blast with my old K-code coupe back in the day. GT40, GT40P, would be great factory heads. We are offering a pair of original Ford Cobra 5.0 GT40 cast iron cylinder heads. For the most part 302 heads and 351W heads are the same. But don't think that adding a bigger camshaft will make more power. If you have a early 351W ie pre 76 it probably . Everything fits, use the stock rockers and pushrods. Posted on May 07, 2014 by promarengine. This is an older thread, you may not receive a response, and could be reviving an old thread. 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. That's fantastic for the minimal investment we made. (Image/Harrison Creamery). 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. The headers will improve this airflow throughout the entire rpm rangeadding more torque and horsepower. The HP DIFF column on the far right lists the horsepower difference between Test 1 and Test 3. 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. But the part about a cam replacement possibly being a labor intensive undertaking is correct. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Test 1: 750-cfm carburetor, dual-plane intake manifold, and stock camshaft. 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. Also, the spark plug angle makes it a pain. Different years can have different combustion chamber sizes but ffor the most part there will be no performance increases by going with 302 heads. Sponsored. We guarantee plenty of burnout action when you add GT-40P heads to your 5.0 Mustang. 402 HP NA from a HI PO 289 isnt that mysterious of a feat to accomplish with todays SBF Aftermarket parts availability. I have a 302 Windsor V8 EFI engine that I converted to a 600 cfm carburetor with a Street Warrior intake manifold. 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 I have a 5.0 from a 1992 Mustang in my 65. Depending on the Headers you have you might be okay. Anyways, I know the gt40ps will bump . For a better experience, please enable JavaScript in your browser before proceeding. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. The heads got a 3 angle valve job, new valves from speed-pro and all the valve train was from crane that matched the current hydraulic cam. 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. 68stang351 Founding Member May 16, 2002 850 Step 1. Yeah, except those. a) ain't early and b) aren't 289 heads. 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 The reason for this is that we're actually replacing mildly worked E7TE heads. Ford Factory 5.0 Performance Cylinder Heads. After graduating from Iowa State University with a journalism degree in 1978, he combined his two passions: cars and writing. 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. The kit offers adjustable power from 50 to 250 hp with a simple jet change. Enter your search keyword. 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. Gt40 heads/intake from a jy explorer, leave the . Ford's seminal 302 engine (later re-dubbed the 5.0) has been popular with budget-minded hot rodders for decades. This is the main reason why these engines are not modified as much as the small block Chevy. 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. For a better experience, please enable JavaScript in your browser before proceeding. 97% Positive Feedback . This test went so well that we were eager to see what the slightly bigger cam would do. 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. Im running stock GT40 heads with stock 4.000 bore on cylinders and a Lunati cam with 256/262; Duration @ .050 (Int/Exh): 213/219; Gross Valve Lift (Int/Exh): .483/.499; LSA/ICL: 112/108. Beyond the engine's amazingly good appearance, Moore had a couple of good reasons for choosing this engine. Well that article just got me very ancy, I want these heads!! Yea. 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. I guess someone could just do a basic valve job and throw on the GT40 upper/lower intake for a cheap HP boost. Test 3: Installed the larger Lunati camagain, no other changes. Here is my setup. For this reason, we're not sure what kind of boost the GT-40P heads will give. All Ford Mustangs | Model Specific Forums, GT-40P Heads - 5.0 Mustang & Super Fords Magazine. .. i would not buy valves unless you need them amd would not switch to studs with these heads for your low hp . Junkyard Gt40p Heads-add 30+ Hp to Your 5.0l (For Free?) I have a very good running stock 1981 302 in a F100 short box. A forum community dedicated to Ford Mustang owners and enthusiasts. The car weighs #2835 with driver. Ask Away! with Jeff Smith: Camshaft and Cylinder Head Recommendations The 2 heads are about the same when looking at the numbers with the GT40p heads having a slight edge. $139.99. These are some of the pictures I have showing the Explorer manifolds. And agree the cams do help and a few tricks with the heads that I have discovered really make a difference. He'd be the best source. 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. 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. Let us explain. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Note the head bolt hole issue, some GT40 iron heads had 1/2 holes, if not they will need to be enlarged. 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.

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