302 with gt40p heads horsepower

When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Best of all, no machining is required to install these on your stock cast iron heads! Anythoughts? (Image/Harrison Creamery). For this reason, we're not sure what kind of boost the GT-40P heads will give. If you're running a stock cam, 1.7 rockers will work perfectly. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. In a lightweight Fox or early Mustang with a five-speed behind it, this would be a great little street engine. Pride is built, in your garage, with your two hands. The tube headers showed a gain of almost 100 hp! Depends on the budget. by travis Sun May 03, 2020 8:33 am. 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 question was whether we wanted a torquey small-block or a more cammed-up rpm engine to boost peak horsepower. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. 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. For 2018, the Coyote makes 460 hp. 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. Click to reveal this head is complete with new 1.837 int valves and 1.536 exhaust valves. 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 don't need tons of power to enjoy the car. This needs to be removed and different exhaust valves, retainers, and valve springs added to turn this into a decent street head. Over $2050 for the 165/185 renegades. You can have your current 28 oz rebalanced to 50. 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. Now he serves as a regular contributor to OnAllCylinders. Install a Ford Motorsport E303, X303 or F303 cam, or any of the similar units from Indy, Lunati or your favorite manufacturer. Compare. Cast iron GT40Ps as cast flow better than non-Ps due to revised plug location/angle. I guess I had it backwards, sorry about that, didn't mean to spread misinformation. On slicks the car went some low 7.70s right at 90mph. There are too many variables to add to this regarding aftermarket stroker kits or components. What did the heads flow? 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 got a GT40P off the assembly line years ago. 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 Posted on May 07, 2014 by promarengine. All Ford Mustangs | Model Specific Forums, GT-40P Heads - 5.0 Mustang & Super Fords Magazine. 68stang351 Founding Member May 16, 2002 850 Even with a stock Mustang 5.0 cam makes good power. Nice to see actual dyno results instead of "butt dyno" guesses. This one added another 10 degrees of duration over the smaller Voodoo cam, along with 0.020 inch more intake valve lift. The Fora platform includes forum software by XenForo. Most of the time, GT-40 heads are worth a good 20-40hp over stock heads. You could run a thinner head gasket as well. I have a 66 mustang with its original untouched 289 with over 140 k on it that Ive been running a blow thru turbo making 14 lbs of boost on for the last 5 years and its never given me a problem. The MPH was there to run a little better but the local track is about terrible. I need that part number too! Its funny no one mentioned anything about ignition timing or components, Your email address will not be published. But dont think that adding a bigger camshaft will make more power. 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. made more power everytwhere and 40 hp is respectable. If you're going to use the stock 289 heads, install 1.84-inch intake valves, then port the intake and exhaust; these mods will net you about 185 cfm of intake port flow at 0.50 lift. Also, you'll need to get a steel distributor gear to replace the iron gear that is currently on your distributor. Ha! These are some of the pictures I have showing the Explorer manifolds. In less than an hour, we were ready to test. THANKS VERY MUCH! Our recommendation would be, rather than change the camshaft, you might want to look into adding a set of long-tube headers and a dual exhaust if the engine is not already so equipped. Let us explain. In addition, the cam timing was designed for torque, with duration somewhere around 190 degrees at 0.050 with roughly 0.450-inch lift. Sponsored. If you go with a diffrent cam, make sure you change springs, The Trick Flow kit comes with everything for around $130. people can stop saying that adding aftermarket cam with stock heads is a waste of time. I have been working on Fords for 40 years and I have experimented with a few tricks of my own. Assemble the rotating assembly with a stock 5.0L crankshaft, a set of 5.0L rods and the specified pistons with stock-type rings. Depending on the Headers you have you might be okay. Commonly referred to as Explorer heads, GT-40P iron castings are found on current 5.0-equipped Explorers. check out the. Required fields are marked *. Install a set of 1.7:1 roller-tipped rocker arms on the heads. Not when you can buy a set of Promaxx or AFR Enforcer heads for $1000, that already have decent hardware included. 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. This will follow the guideline of a 1.6 rocker baseline and factory bottom end 79-95 related 5.0L Mustangs only. I'm using the Trick Flow stage 1 cam with 1.7 roller rockers. Part of this reason is due to its inherent strength and simplicity, but a lot of it has to do with how little Ford has changed it over the years. 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. Application Fits 1979-95 Mustang 302/351 w/ OEM Small Block Ford Heads Where they differ is the combustion chamber size. You didnt mention which cam you had in mind. 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. Different years can have different combustion chamber sizes but ffor the most part there will be no performance increases by going with 302 heads. Advanced: Daily Deals; Help & Contact; Sell; My eBay Expand My . 302, GT40P Heads, E cam, 4 into 4, Holley 600, Mallory Unilite, Levy SD T5, 3.73, 15" Team III, firewall mod, trunk mod, trailer hitch, drivers foot box mod, front tow rings. A mild porting with gasket matching will be very good. Can anyone give me a little feedback about a '99 Explorer 5.0, and tell me if it's my answer. With the engine reassembled, we boxed up our second camshaft and headed for Westech's dyno. This is needed for the steel roller cam. how much HP and torque? Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! Every thing he tells you on this site is true. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. 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. that is a healthy budget deal. Car Craft mag. FULL DYNO RESULTS. 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. However, when we dyno'd the car before installing the GT-40P heads, the fan was on the car. That's fantastic for the minimal investment we made. A forum community dedicated to Ford performance owners and enthusiasts. The 302 uses smaller 7/16" head bolts and your "P" heads may or may not require the step washers. 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. 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. If you dont feel comfortable doing this higher a pro. 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. Location: Re: Stock Ford 351W 4bbl dyno numbers. 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. 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. never messed with the timing, its at 35* total . P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. SBF FORD Aluminum Cylinder Heads 302 /351w 190cc 62cc 2.02 /1.60 For ROLLER CAM. We gained 45 hp and 40 lb-ft of torque. 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. 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. 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. We compare the GT40s to modern cylinder heads as well as other heads from the era. Seriously though if you're not planning on an all-out attack for HP, I'd consider a forged piston out of Probe's SRS line-up. 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. Mar 23, 2004. You need to check. Come join the discussion about popular models such as the Mustang, Galaxie, Falcon, Fairlane, Torino, Shelby and many more! 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. Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more! 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! 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. Not to mention, they will run circles around GT40P's out of the box. Along with the heads, we used MAC headers for GT-40P heads. 1986 Short block with notched pistons. Ive been building ENGINES for 40+ years. fordfan289, Aug 27, 2011 GT40s have 64cc chambers. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 SBF OEM | eBay Motors, Parts & Accessories, Car & Truck Parts & Accessories | eBay! Im now thinking of adding a cam to match the carb. 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 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. When building an engine there is a lot to take into consideration. That carbureted GT40P motor made 465 on th engine dyno with a .500" 239/244 camshaft, Holley 650 carb and Weiand Stealth intake. Not bad for off the shelf parts and a stock shortblock. You can find them on later model Mercury Mountaineers and several other Ford SUV applications. The results were a major increase in power throughout the entire rev range, with an increase of 60hp at 4500rpm through to a peak of 279hp at 5800rpm. I view the GT40P heads similar to Granada brakes. I'll save the effort and lighten my front end by 50# with aluminum. Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - GT40P heads? 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. Compare. this head fits years 95-01 explorer mountaineer mercury mountaineer . The HP DIFF column on the far right lists the horsepower difference between Test 1 and Test 3. The dyno recorded a peak horsepower reading of 489 hp, but the air/fuel ratio was slightly on the rich side at 11.5:1, so we increased the nitrous jet to a 61 and hit the button again. Building a 302-inch small-block to produce 400 hp is really no big deal, but doing. The only one that's close, is #7. I recall having an absolute blast with my old K-code coupe back in the day. Skip to main content. Assuming the above configurationa pushrod 5.0L will potentially make between 250 and 260 hp. The GTp heads are like GT 40's with smaller combustion chambers and the spark plugs are relocated for a more efficient burn. 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 '00 Ford Explorers and Mercury Moutaineers were factory equipped with one of Ford's better 5.0L motors.

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