Advanced: Daily Deals; Help & Contact; Sell; My eBay Expand My . Stock valve sizes? We did the installation at Holten's place of employment, Motorworks, in Longwood, Florida. But what we were most impressed with was the solid gain in torque over the smaller Voodoo cam from 3,500 and up. Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. Slover primarily focused on the exhaust side of the GT40P heads. 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. Plus you will need to drill all the head bolt holes out as the 351W uses larger head bolts. Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! 68stang351 Founding Member May 16, 2002 850 Here a comparison of different heads on a 302: I'm very happy with my GT40P. I have a 432 HP non Hi Po 289 I built. Assuming the above configurationa pushrod 5.0L will potentially make between 250 and 260 hp. We started with a 120,000-mile 5.0L out of a Ford Explorer, removed the EFI and DIS, and pocket ported the stock GT40P iron heads with stock valve sizes. 1983 Mustang G.T. All this is worth it. If they are cheap enough, take them anyway. What would be the best cam and springs to use for these heads in a 302 Windsor? Consider having the head's intake ports matched to the intake manifold gasket. Limited header choice is certainly a challenge. Perhaps even more surprising was how well this engine idled, calmly purring with 16 inches of manifold vacuum at 980 rpm. Both have very similar valve sizes, but the GT40P head has slightly larger combustion chambers for a small bump in compression and better flow. Depends on the budget. Runs well. 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. Ill do springs and a moderate cam and go for a good, dependable power plant. 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. The headers will improve this airflow throughout the entire rpm rangeadding more torque and horsepower. ported GT-40p, ported cobra intake, 65mm BBK, e-cam with 1.7s, longtubes, off-road x-pipe with flowmasters dumped. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. These engines came with the GT40P head, which even with its small valves, offers really good performance. We will go into more detail on the head mods in a later story in Junkyard Builder, so watch for it. We also added an Edelbrock Performer RPM dual-plane intake and a set of 158-inch headers with no mufflers. 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. Aside from the cost of the nitrous itself, this setup should cost you little more than a stock rebuild using all brand new parts. The asterisk HP differences are calculated using Test 1's 294-hp peak. If you dont feel comfortable doing this higher a pro. An aggressive cam will wake it up a bit. If you're running a stock cam, 1.7 rockers will work perfectly. It's a classic move we've pulled off many times. 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. Just got through porting one of my gt40p heads today. (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. Build Thread 1965 Fastback Project "Racesteed". Required fields are marked *. Not to mention, they will run circles around GT40P's out of the box. Not when you can buy a set of Promaxx or AFR Enforcer heads for $1000, that already have decent hardware included. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Ive bought wrecking yard SBFs and put 20 lbs of boost to them and spin them to 7000 and made 500 HP with several of them. Related Resources Mustang Generation Nicknames: What Do They Mean? Do not ever, ever think about using the tube type manifolds. 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. i have a 302 engine from a 1977 granada and i am wondering if gt40p heads from an explorer will fit on this motor. Test 2: Changed to the smaller of the two Lunati camshaftsno other changes. 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 wouldnt recommend reusing lifters though. Compare. 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. $169.50. The Fora platform includes forum software by XenForo. could the gear of off the oil pump drive(i know they're DIS), for the explorer motor be used on his dizzy? 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. many thanks to all you eco-hippies giving me dirty looks and helping me feel llike an overall badass rebel. The heads also required some machine work, including screw-in studs, guideplates, and widening the spring pockets for bigger valvesprings. fuel injection system . Even with relatively small valve sizes of 1.85-inch intake and 1.46-inch exhaust, the P-heads flow much better than previous. The GT40P heads flow a lot better than stock 351 heads. We then dyno'd the car without the fan to get some consistency and were rewarded with a peak of 316 hp at 5,500 rpm, and 348 lb-ft of torque at 4,000 rpm. I'm using the Trick Flow stage 1 cam with 1.7 roller rockers. . You just want to keep it out of detonation. They work, but present their own challenges. The engine never huffed oil out of the breathers, and the spark plugs all looked excellent. First, adding headers will improve power on the existing combination. The car weighs #2835 with driver. GT 500; Posts: 8496; Location: Brisbane . Install a set of 1.7:1 roller-tipped rocker arms on the heads. Using the manufacturer recommended springs for your camshaft are a safe bet. T5z and 3.89 9" TL rear. They suffered from poor aftermarket support up until about 15 years ago when it really came on strong. I have been working on Fords for 40 years and I have experimented with a few tricks of my own. I bought a crate 302 from Downs Ford a few years ago that was producing 320 hp. Assemble the rotating assembly with a stock 5.0L crankshaft, a set of 5.0L rods and the specified pistons with stock-type rings. made more power everytwhere and 40 hp is respectable. Thanks. The '00 Ford Explorers and Mercury Moutaineers were factory equipped with one of Ford's better 5.0L motors. Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. After graduating from Iowa State University with a journalism degree in 1978, he combined his two passions: cars and writing. You'll also have to use your 289 timing chain cover since it has a hole for the oil dip stick and fuel pump. Hey all, I'm working on building a 302 with my gt40p heads. Different years can have different combustion chamber sizes but ffor the most part there will be no performance increases by going with 302 heads. The only way to really make more power is to go with a stroker kit, blower and/or heads. Features hardened 4140 Chromoly retainers, valve locks, spring shims, a spring height gauge, valve seals, and instructions. Well offer one as an example. 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 With no other changes we gained 25 hp using factory iron heads. JavaScript is disabled. Even with a stock Mustang 5.0 cam makes good power. Application Fits 1979-95 Mustang 302/351 w/ OEM Small Block Ford Heads You didnt mention which cam you had in mind. I have a 5.0 from a 1992 Mustang in my 65. 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. We didn't increase the valve size, although we did have to add Manley valves to get the proper spring-installed height. This website is using a security service to protect itself from online attacks. They were located in Tahachapi CA, and were sold with upgraded springs for $650.00, back in 2002-2003 ish. Install a Ford Motorsport E303, X303 or F303 cam, or any of the similar units from Indy, Lunati or your favorite manufacturer. And remember ENGINES have been being built/rebuilt/modified for years. 402 HP NA from a HI PO 289 isnt that mysterious of a feat to accomplish with todays SBF Aftermarket parts availability. check out the. That's fantastic for the minimal investment we made. This pushed that little Ford to a peak horsepower of 503, and that was where we stopped. As noted, this is looking like hes building a 351 Lightning truck motor, which is a good way to go. Stock 1989 5.0L HO pistons will work if you can find them. BONUS TEST-FOUR DIFFERENT 302 INTAKES.. Instructions on porting the GT-40p heads here. 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. 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. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more! Stock 93-95 Cobra shortblock (stock cobra cam), GT40X heads, 1.7 rockers, Edelbrock Performer RPM intake, Holley 650, and longtube headers. Free shipping. this head is complete with new 1.837 int valves and 1.536 exhaust valves. GT40, GT40P, would be great factory heads. Can anyone give me a little feedback about a '99 Explorer 5.0, and tell me if it's my answer. Anythoughts? Then why did you port the heads and how do you know if you made an improvement. This will cost additional money but is still worth it, in our opinion. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. He'll have to get a gear for his distributor. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. That's more than enough to feed a power-brake booster. I was looking at putting on the GT40P heads on. A bone stock 2bbl early 351w with stock replacement forged pistons (9.0 compression) and dyno headers made 211 Hp . ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. Richard Rowe has been writing professionally since 2007, specializing in automotive topics. Win or lose, if you buy the ticket you must take the ride. E303 Cam advanced 4 degrees. Really hurt too. 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. 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. We compare the GT40s to modern cylinder heads as well as other heads from the era. United Engine and Machine sells cheap but decent pistons that will do what you're wanting. Like I said lots of options. There are literally a dozen or so camshaft companies that offer a mild hydraulic roller cam for a 5.0L Ford. I'll prob take a trip up there this weekend after scavenging the junkyards, thanks a million. If we subtract the 20 hp that the fan is worth, we end up with a gain of 25 hp. any input is apprecciated:smartass: Thank you for the info, if all I have to worry about is the plugs then I'm in good shape hahaha. Early Windsors tend to have fairly restrictive exhaust manifolds, making the addition of a set of headers that much more efficient. (Image/Harrison Creamery). Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. 1983 Mustang G.T. There are caveats to this plan, however. These heads have been remanufactured using refaced reclaimed Factory Valves. Free shipping. He'd be the best source. Ive been building ENGINES for 40+ years. You can find them on later model Mercury Mountaineers and several other Ford SUV applications. never messed with the timing, its at 35* total . 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. Per a UEM tech support email I have the Icon IC736 is supposed to be good for GT40 heads when I asked about it. Don't let the fact that the iron GT40 heads have a larger exhaust valve fool you. I just read about this build on the corral.net. 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. Now he serves as a regular contributor to OnAllCylinders. But the part about a cam replacement possibly being a labor intensive undertaking is correct. SB Ford GT40P Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. 02-11-2012, 07:16 PM #6 fiveoh 86lx Going from your heads to the GT40p heads will bump your compression by about a point.so hello bottom end torque. In addition, the cam timing was designed for torque, with duration somewhere around 190 degrees at 0.050 with roughly 0.450-inch lift. JavaScript is disabled. Find many great new & used options and get the best deals for FORD GT40p 4 BAR HEADS IN GOOD CONDITION w/ONE BOLT BROKEN at the best online prices at eBay! 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. Good Luck. When building an engine there is a lot to take into consideration. The question was whether we wanted a torquey small-block or a more cammed-up rpm engine to boost peak horsepower. Building a 302-inch small-block to produce 400 hp is really no big deal, but doing. We turned to Rare Auto Design in Orlando for dyno tests to find out how much horsepower we gained. Cant wait to try um out. Ha! I spin it to 6500 and thats about it. .. i would not buy valves unless you need them amd would not switch to studs with these heads for your low hp . The kit offers adjustable power from 50 to 250 hp with a simple jet change. Both swaps made more sense when parts were readily available at the bone yard for cheap. Im now thinking of adding a cam to match the carb. We are offering a pair of original Ford Cobra 5.0 GT40 cast iron cylinder heads. SB Ford GT40 Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS. I'd much rather be able to drive it at 8 or 9/10s of what it can handle. I got a set of AFR heads , night and day. Everything fits, use the stock rockers and pushrods. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. I'm also have the regular GT40 heads on my current build. 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. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. 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. Car Craft mag. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. For this reason, we're not sure what kind of boost the GT-40P heads will give. The hardest part of swapping the cam was just getting the timing cover off and back on again. that is a healthy budget deal. What you are trying to do is to increase the amount of airflow through the engine in order to make more power. Definitely going to use my P heads. AFR 165 Heads | Have options for pedestal mounted rocker arms or stud mounted rocker arms. 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. Best of all, no machining is required to install these on your stock cast iron heads! Ford's seminal 302 engine (later re-dubbed the 5.0) has been popular with budget-minded hot rodders for decades. 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. The 2 heads are about the same when looking at the numbers with the GT40p heads having a slight edge. Eldelbrocks Air Gap intake manifold should work well with the combination. at the crank. $700.98. 69.90.139.244 For 2018, the Coyote makes 460 hp. 1 - 7 of 7 Posts. Add a distributor designed for a carbureted 302 but make sure to install the correct distributor gear for your cam. The combination of this cam with your intake and headers will produce a very nice street engine. Purchase any used aftermarket manifold for the 302 that is designed to function in the 3,500 to 6,500 power band. That carbureted GT40P motor made 465 on th engine dyno with a .500" 239/244 camshaft, Holley 650 carb and Weiand Stealth intake. 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. But don't think that adding a bigger camshaft will make more power. No-option stripper- I like strippers. I've not seen a set of longtubes that have an issue with GT40P's, either. After we installed the heads and with the fan off, he ran a 12.46 at 107.9. This needs to be removed and different exhaust valves, retainers, and valve springs added to turn this into a decent street head. It turned out we were conservative on both counts. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. the springs are new stock oem ford. 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. 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. No-option stripper- I like strippers. I had a set of 69 302 heads I ran for a while . $139.99. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. 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. Keep in mind that swapping camshafts is a fairly extensive effort. 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. Be careful, I was once bitten by one of those reptile engine builders. Those heads were unported and had stock valve sizes! Cloudflare Ray ID: 7a2e2d95dedea1e4 #2::: Get advice from a reptile engine builder with experience(first flag for me is when somebody refers to an ENGINE as a MOTOR! We need a build on a 400+ hp 302/6 build. The rest went very smoothly, and we reused the stock lifters and suffered no ulcers worrying about breaking in the cam. There is a better way. Central Coast Mustang sells GT-40P heads at a great price, making them a viable alternative in a market flooded with performance head choices. Despite adding 30 degrees of intake duration, this cam improved torque throughout the entire test from 3,000 rpm on up. Over $2050 for the 165/185 renegades. The gt40p head is considered the best OEM 302 head made. If this is beyond your technical ability, you could ask a local machine shop to perform the modifications. 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. Beyond the engine's amazingly good appearance, Moore had a couple of good reasons for choosing this engine. 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. But dont think that adding a bigger camshaft will make more power. ***Most important is theStupid question is the one that was never asked!*** 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. However there are plenty of factory heads that with the help of an experienced machine shop can be great. They fill that spot between power and budget. Manual trans. I can tell you that with my 9.503 block, 22cc dished pistons and 64cc heads, I'm at 9.5:1 compression. It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. Keywords Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. GT40s have 64cc chambers. Your email address will not be published. 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). The later model distributors had a different diameter shaft than the earlier ones. While the heads were off getting a massage, we turned our attention to the cam timing. Smith began writing for Car Craft magazine in 1979 and became editor in 1984. Let us explain. Well that article just got me very ancy, I want these heads!! In less than an hour, we were ready to test. 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. 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. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. AFR 165cc 58cc Heads. the engine is carburated of that makes a difference. HAD '82 GT monochromatic (red).black cloth HAVE 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. I guess someone could just do a basic valve job and throw on the GT40 upper/lower intake for a cheap HP boost.