302 with gt40p heads horsepower
I need that part number too! If you can find individual flanged headers like the obsolete MAC headers had, those worked really well with GT40P's. A bit of info for those looking to build 300+hp 5.0L/302s The 2 heads are about the same when looking at the numbers with the GT40p heads having a slight edge. Motor is going into a Ranger. Pride is built, in your garage, with your two hands. check out the. Richard Rowe has been writing professionally since 2007, specializing in automotive topics. 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. What did the heads flow? What Cam and Springs to Use for GT40 Heads are you twisted331 also? This will cost additional money but is still worth it, in our opinion. Ported Hurricane Single Plane and custom 750 HP. 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. A LOT of them do it these days. Required fields are marked *. After a couple grand you have a killer set of heads, but there's got to be a less-expensive way of making horsepower. Sponsored. Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - GT40P heads? 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. In addition, the cam timing was designed for torque, with duration somewhere around 190 degrees at 0.050 with roughly 0.450-inch lift. 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. 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. Step 1. Good on ya Jeff Smith. It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. 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. 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. Anythoughts? timing and compression ratio with gt40p heads - Modded Mustang Forums BONUS TEST-FOUR DIFFERENT 302 INTAKES.. 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. This website is using a security service to protect itself from online attacks. A COMP hydraulic roller cam we found works well with this combination. 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. 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. This will keep you from dropping your overall static compression ratio and losing power. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. He has worked as a tractor-trailer driver and mechanic, a rigger at a fire engine factory and as a race-car driver and builder. Cloudflare Ray ID: 7a2e2d95dedea1e4 These timeslips are from 1280' above sea level. The Fora platform includes forum software by XenForo. Car Craft mag. 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. just curious. '85 GT vert two tone (white on charcoal)white leather, http://www.facebook.com/groups/233213650060739/, http://www.summitracing.com/parts/TFS-2500100/, 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 made more power everytwhere and 40 hp is respectable. We did a quick search for hydraulic roller cams and landed on a COMP camshaft that looked promising. Using the manufacturer recommended springs for your camshaft are a safe bet. 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. Pretty sure that was name, but I could be wrong. 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. thats after 3 hours of idling/midrange hits to tune the idle and part throttle . The Fora platform includes forum software by XenForo. gt40p headers | Maverick/Comet Forums You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. This needs to be removed and different exhaust valves, retainers, and valve springs added to turn this into a decent street head. Not sure how they would mate up to your existing exhuast, but otherwise they should work. Always the weak area in the 289 and 302 is the tiny 5/16 inch connecting rod bolts and the miniscule intake and exhaust ports. If the head bolt holes are 1/2" or slightly larger, ARP makes the washers and can be sourced from Ford Racing or ARP through a speed shop or Summit, Jegs and PAW among others. GT40P Heads how much hp from them. - StangNet 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. Compare. the engine is carburated of that makes a difference. SBF FORD Aluminum Cylinder Heads 302 /351w 190cc 62cc 2.02 /1.60 For ROLLER CAM. If you go with a diffrent cam, make sure you change springs, The Trick Flow kit comes with everything for around $130. No-option stripper- I like strippers. Free shipping for many products! The Fora platform includes forum software by XenForo. The valve seats have been cut on a . They fill that spot between power and budget. Add 40 to 70 HP to your 302 yourself - Factory Five Racing Forum Also, you'll need to get a steel distributor gear to replace the iron gear that is currently on your distributor. GT40, GT40P, would be great factory heads. gt40p heads on a 289 in a 66 | Vintage Mustang Forums At the dragstrip, we gained two-tenths and 2 mph. I have heard this rod bolt weakness myth for years but have yet to have a single problem with them in any of the SBF engines I have pounded on for the last 30 years and there have been lots of them. Free shipping. The combination of this cam with your intake and headers will produce a very nice street engine. JavaScript is disabled. It's a classic move we've pulled off many times. Upgrading Fox Body Cylinder Heads - AmericanMuscle.com Overview. Nudge us with emails, and we'll make it happen. 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. $700.98. I can tell you that with my 9.503 block, 22cc dished pistons and 64cc heads, I'm at 9.5:1 compression. The entire front accessory drive and timing chain cover must be removed, along with the distributor and intake manifold. Gasoline/Diesel all makes on earth & still doing it today with great pride.Feel free to contact me anytime. We will go into more detail on the head mods in a later story in Junkyard Builder, so watch for it. 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. 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. I'm sure the dyno operator used some goofball correction factor to make the numbers look higher. Build Thread 1965 Fastback Project "Racesteed". However realistically, with the amount of money spent modifying the gt40p heads or even those older 289 & 351w heads, you could have even better performing aluminum heads. I guess I had it backwards, sorry about that, didn't mean to spread misinformation. I've not seen a set of longtubes that have an issue with GT40P's, either. Eldelbrocks Air Gap intake manifold should work well with the combination. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. 950.00 us a set and will ship . Most of them are aware of what changes need to be completed. The gt40p head is considered the best OEM 302 head made. Assemble the rotating assembly with a stock 5.0L crankshaft, a set of 5.0L rods and the specified pistons with stock-type rings. If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. 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. 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. Learn how your comment data is processed. 1 - 7 of 7 Posts. Runs well. On the power side, we selected 400 hp as an impressive but reasonable output for our small-block 5.0L Ford. I got lucky and found a complete Explorer GT40P engine online. THANKS VERY MUCH! VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. Install a set of 1.7:1 roller-tipped rocker arms on the heads. There are caveats to this plan, however. (its not their engine) We did the installation at Holten's place of employment, Motorworks, in Longwood, Florida. 02-11-2012, 07:16 PM #6 fiveoh 86lx Or, you could invest in a new set of heads that would also do the same job but you can expect to spend quite a bit more money. FULL DYNO RESULTS. You didnt mention what camshaft you would be choosing or exactly which 5.0L Ford Windsor engine you are working with. Even with a stock Mustang 5.0 cam makes good power. 68 XR7 & 68 M-100. This is not a criticism but instead consider it to be more of a heads-up. In less than an hour, we were ready to test. Despite adding 30 degrees of intake duration, this cam improved torque throughout the entire test from 3,000 rpm on up. This test went so well that we were eager to see what the slightly bigger cam would do. JavaScript is disabled. Features hardened 4140 Chromoly retainers, valve locks, spring shims, a spring height gauge, valve seals, and instructions. Cant wait to try um out. 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. 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. T5 with 3.73s. anyone have experience with GT40P heads on a 92 351W So . Yeah, out of a bolt on upgrade, you'd probably be looking at 260-280rwhp ish with supporting mods. 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. This 1979-1995 Mustang cylinder head and camshaft guide will overview the heads and cams we offer and how they will coincide. 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. If you're running a stock cam, 1.7 rockers will work perfectly. And have discovered something that I dont think anyone else knows. Every thing he tells you on this site is true. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. I have to agree, the GT40P heads flow better than the GT40 iron heads. Here is my setup. I am sure you have increased the bore size and possibly even the stroke a bit and spin it up pretty high in the RPM range. people can stop saying that adding aftermarket cam with stock heads is a waste of time. I view the GT40P heads similar to Granada brakes. Not when you can buy a set of Promaxx or AFR Enforcer heads for $1000, that already have decent hardware included. Related Resources Mustang Generation Nicknames: What Do They Mean? 302 heads on 351w | ClassicBroncos.com Forum There was an article in Hot Rod magazine in the mid '80's where Jon Kaase was developing 351w packages. that is a healthy budget deal. Not to mention, they will run circles around GT40P's out of the box. Some ideas never go out of style. this is the price for one head. 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. 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. The HP DIFF column on the far right lists the horsepower difference between Test 1 and Test 3. For real performance, stock E7TE heads leave a lot to be desired. These heads have been remanufactured using refaced reclaimed Factory Valves. In review, we rescued a used 5.0L Ford from the boneyard, ported the heads, added a cam, carburetor, intake manifold, and headers, and pulled an amazing 376 hp out of the mix. With no other changes we gained 25 hp using factory iron heads. I am very happy too. Trick Flow Mustang Valve Spring Upgrade Kit - Cast Iron Head (79-95) Supercharging GT40p heads | Modded Mustang Forums There are a couple of reasons for this suggestion. What Are The GT40 & GT40P Heads? - LMR.com The only way to really make more power is to go with a stroker kit, blower and/or heads. 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! You can have your current 28 oz rebalanced to 50.
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