302HO with gt40p heads | Mustang Forums at StangNet However I think the opportunity window is slowly closing. Both swaps made more sense when parts were readily available at the bone yard for cheap. Every thing he tells you on this site is true. 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. $700.98. Depending on the Headers you have you might be okay. 99 Explorer engine (302) with GT40P heads - Ford Muscle Cars Tech Forum I plan on running a AFM b31 cam too which has relatively small duration for the intake valve. Stock 93-95 Cobra shortblock (stock cobra cam), GT40X heads, 1.7 rockers, Edelbrock Performer RPM intake, Holley 650, and longtube headers. 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. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. Assuming the above configurationa pushrod 5.0L will potentially make between 250 and 260 hp. Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - GT40P heads? $930.00 + $55.00 shipping. Cast iron GT40Ps as cast flow better than non-Ps due to revised plug location/angle. The gt40p head is considered the best OEM 302 head made. 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. 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. I used Lightning heads on my 302, (GT40 not P) with stock rockers on a flat tappet engine. 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. E303 Cam advanced 4 degrees. I have a 302 Windsor V8 EFI engine that I converted to a 600 cfm carburetor with a Street Warrior intake manifold. All this is worth it. Just got through porting one of my gt40p heads today. 1983 Mustang G.T. this is the price for one head. . 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. However, when we dyno'd the car before installing the GT-40P heads, the fan was on the car. JavaScript is disabled. They also have emissions legal heads as well. The GT40 heads have thermactor holes built in to connect to the EGR/smog equipment whereas the GT40P heads use an external EGR connective system. GT40 Heads On A 289? | Ford Muscle Cars Tech Forum You might even say its like flogging a dead horse without any animals actually being injured during my moments of sarcasm. I'll save the effort and lighten my front end by 50# with aluminum. SBF FORD Aluminum Cylinder Heads 302 /351w 190cc 62cc 2.02 /1.60 For ROLLER CAM. The '00 Ford Explorers and Mercury Moutaineers were factory equipped with one of Ford's better 5.0L motors. Keywords I have to agree, the GT40P heads flow better than the GT40 iron heads. Take the assembly to a machine shop to have it balanced and install it in the block. Along with the heads, we used MAC headers for GT-40P heads. I am very happy too. Well assume it is a 5.0L with stock heads. 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). While the heads were off getting a massage, we turned our attention to the cam timing. They almost seem like flywheel numbers rather than RWHP numbers. Step 2. Would have liked to see a comparison done on the same short block using a set of decently-ported early non-Thermactor iron heads Tracy Blackford, 65 Mustang FB, 331 built with 289 H beam rods and 383W piston, 282S cam, self ported '70 351w heads, Dougs Tri-Y headers. Most all long tubes come out far enough to clear and other short tube headers will work but there is clearance issues on two of the cylinders. Dec 8, 2011. Manual trans. 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. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. just curious. 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. K.S. Enter your search keyword. If I remember right, non of the GT40P's (later models) had the thermactor smog provisions. The heads that were used were also old C8 casting with 58cc chambers. Vehicle: 1972 2 door 302 maverick, 1986 5.0 stang gt convertible,66 mustang coupe, HEMI ram. Holley 670 street avenger carb. 1.7 shaft rockers and beehives. 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. The spark plug issue is almost a non-issue. Mac and Ford Motorsport both make a GT40P spacific header. Over $2050 for the 165/185 renegades. 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. The Edelbrock Performer RPM is a good choice, but Holley, Weiand and Ford Motorsport also have similar offerings. Advanced: Daily Deals; Help & Contact; Sell; My eBay Expand My . That carbureted GT40P motor made 465 on th engine dyno with a .500" 239/244 camshaft, Holley 650 carb and Weiand Stealth intake. How to Get More Horsepower Out of a Ford 289 | It Still Runs 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. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. Not *as* good as the GT40p heads, but I'd prefer to not have to worry about exhaust fitment issues, or have a narrow range of what I can work with. You didnt mention what camshaft you would be choosing or exactly which 5.0L Ford Windsor engine you are working with. These engines came with the GT40P head, which even with its small valves, offers really good performance. . 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. Cloudflare Ray ID: 7a2e2d95dedea1e4 The action you just performed triggered the security solution. A forum community dedicated to Ford performance owners and enthusiasts. GT 500; Posts: 8496; Location: Brisbane . Maybe I'll think about a cam swap? 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. 950.00 us a set and will ship . I recall having an absolute blast with my old K-code coupe back in the day. We also added a veteran Ford magnetic pickup distributor and used it to drive an MSD ignition system. GT40P Heads how much hp from them. - StangNet 289 or 351 heads on a 302 advantage? | The H.A.M.B. We are offering a pair of original Ford Cobra 5.0 GT40 cast iron cylinder heads. 1986 Short block with notched pistons. Pretty sure that was name, but I could be wrong. The valve seats have been cut on a . On the power side, we selected 400 hp as an impressive but reasonable output for our small-block 5.0L Ford. Rowe studied engineering, philosophy and American literature at Central Florida Community College. In a lightweight Fox or early Mustang with a five-speed behind it, this would be a great little street engine. What Are The GT40 & GT40P Heads? - LMR.com For this reason, we're not sure what kind of boost the GT-40P heads will give. If you wanted to make your engine feel strong, these would be a decent investment, but they will require some modifications. Well also assume that this engine is running stock exhaust manifolds. FORD GT40p 4 BAR HEADS IN GOOD CONDITION w/ONE BOLT BROKEN Most of them are aware of what changes need to be completed. 68stang351 Founding Member May 16, 2002 850 I bought a crate 302 from Downs Ford a few years ago that was producing 320 hp. No-option stripper- I like strippers. FORD GT40p 4 BAR HEADS IN GOOD CONDITION . This will follow the guideline of a 1.6 rocker baseline and factory bottom end 79-95 related 5.0L Mustangs only. It took him and yours truly eight hours from start to finish, using air tools and a lift to gain access to the header flanges. Save narve00 However, since Holten's car has an E303 cam, we didn't want the pistons and valves becoming too close, so we chose the 1.6 rockers. The tube headers showed a gain of almost 100 hp! For a better experience, please enable JavaScript in your browser before proceeding. You didnt provide a lot of information about the engine itself, Im assuming its 85 or newer ( roller cam) May need a freshen up of the bottom end if compression is the issue. Beyond the engine's amazingly good appearance, Moore had a couple of good reasons for choosing this engine. This one added another 10 degrees of duration over the smaller Voodoo cam, along with 0.020 inch more intake valve lift. JavaScript is disabled. Skip to main content. are you twisted331 also? 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. Richard Holdener 240K subscribers Subscribe 63K views 1 year ago WESTECH PERFORMANCE GROUP LOW BUCK, GT40P 5.0L HEADS-CHEAP &. how much HP and torque? Definitely going to use my P heads. could the gear of off the oil pump drive(i know they're DIS), for the explorer motor be used on his dizzy? I'd much rather be able to drive it at 8 or 9/10s of what it can handle. Since 2003, Jeff has held various positions at Car Craft (including editor), has written books on small block Chevy performance, and even cultivated an impressive collection of 1965 and 1966 Chevelles. It's an 86 roller 5.0 engine that had a recent rebuild sometime in the past with keith black pistons, otherwise stock. In addition, the cam timing was designed for torque, with duration somewhere around 190 degrees at 0.050 with roughly 0.450-inch lift. Choosing pistons to complement GT40P heads - MustangWorks.com A forum community dedicated to Ford Mustang owners and enthusiasts. The Fora platform includes forum software by XenForo. GT40, GT40P, would be great factory heads. If you go with a diffrent cam, make sure you change springs, The Trick Flow kit comes with everything for around $130. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more! I spin it to 6500 and thats about it. Weiand 7515 xcellerator intake. Buy the lifters for peace of mind now and hopefully for the duration. I'll prob take a trip up there this weekend after scavenging the junkyards, thanks a million. i know a guy who used to build race engines so he has all the right tools, how much would it help to get the heads ported and polished or anything else he could do to them. ported GT-40p, ported cobra intake, 65mm BBK, e-cam with 1.7s, longtubes, off-road x-pipe with flowmasters dumped. This is the main reason why these engines are not modified as much as the small block Chevy. Perhaps even more surprising was how well this engine idled, calmly purring with 16 inches of manifold vacuum at 980 rpm. LOW-BUCK 302 FORD HEAD UPGRADE Richard Holdener 239K subscribers 189K views 2 years ago WESTECH PERFORMANCE GROUP WHAT'S IT WORTH? GT40P heads, 302 and Victor Jr. intake: - Factory Five Racing Forum But the part about a cam replacement possibly being a labor intensive undertaking is correct. 1 - 7 of 7 Posts. 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. Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. Dennis Hilliard of Central Coast says we can expect to gain three-tenths in the quarter-mile. . Through Central Coast you can have the heads fully prepped for your combination. Thanks. fuel injection system . Also, you'll need to get a steel distributor gear to replace the iron gear that is currently on your distributor. 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. 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. We guarantee plenty of burnout action when you add GT-40P heads to your 5.0 Mustang. Required fields are marked *. T5 with 3.73s. Within a few hours of his discovery, the engine was sitting in the back of his truck on its way to a new home. Don't let the fact that the iron GT40 heads have a larger exhaust valve fool you. Obviously, tuneups will vary. This modification will help your late-model GT40P heads work better with the old-school carbureted intake setup. Because of this, your tuneup will probably need to be modified. 351W with GT40P heads? | Mercury Cougar Owners 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. (Please note these are not GT40P Explorer heads). Boy, were we surprised with the results. The reason for this is that we're actually replacing mildly worked E7TE heads. 402 HP NA from a HI PO 289 isnt that mysterious of a feat to accomplish with todays SBF Aftermarket parts availability. We know what you're thinking--only two-tenths from an extra 45 hp? You could run a thinner head gasket as well. This will keep you from dropping your overall static compression ratio and losing power. 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? Max hp out of gt 40 heads | Mustang Evolution Forum Ford Factory 5.0 Performance Cylinder Heads. What you are trying to do is to increase the amount of airflow through the engine in order to make more power. Depends on the budget. It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. You can use the stock roller lifters with any size cam you want. Just make sure it is a roller cam. I think one of the finer traits of a true car guy, is the patience to put a prized car away and just let it sit for a while rather than selling it when life gets in the way. The only way to really make more power is to go with a stroker kit, blower and/or heads. Motor is going into a Ranger. If you know him, ask him. Torque on the other hand isnt something to write home about. Plus you will need to drill all the head bolt holes out as the 351W uses larger head bolts. I don't need tons of power to enjoy the car. 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. They suffered from poor aftermarket support up until about 15 years ago when it really came on strong. 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. I got lucky and found a complete Explorer GT40P engine online. You can email the site owner to let them know you were blocked. This is a function of the somewhat wider lobe-separation angle of 112 degrees. You didnt mention which cam you had in mind. Where they differ is the combustion chamber size. Shop by category. Because its all been done time after time after. 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. 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. There are literally a dozen or so camshaft companies that offer a mild hydraulic roller cam for a 5.0L Ford. Assemble the rotating assembly with a stock 5.0L crankshaft, a set of 5.0L rods and the specified pistons with stock-type rings. Fastest e303 5.0l's? - FourEyedPride.com