Per a UEM tech support email I have the Icon IC736 is supposed to be good for GT40 heads when I asked about it. Keep in mind that swapping camshafts is a fairly extensive effort. 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. The rest went very smoothly, and we reused the stock lifters and suffered no ulcers worrying about breaking in the cam. Posted on May 07, 2014 by promarengine. JavaScript is disabled. 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 The GTp heads are like GT 40's with smaller combustion chambers and the spark plugs are relocated for a more efficient burn. I got rid of the carburetor and went with a F.A.S.T. 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. 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. Step 1. Holten tells us removing the fan is worth two-tenths in itself, which tells us the fan soaks up roughly 20 hp. 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. You can email the site owner to let them know you were blocked. Gt40 heads/intake from a jy explorer, leave the . Do you guys have part numbers for the spring kits? 68 XR7 & 68 M-100. 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. Both have very similar valve sizes, but the GT40P head has slightly larger combustion chambers for a small bump in compression and better flow. AFR 165 Heads | Have options for pedestal mounted rocker arms or stud mounted rocker arms. timing and compression ratio with gt40p heads - Modded Mustang Forums This time around, we chose a shining example of this junkyard art form. 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. If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. Gt40/gt40p Heads On A 351w Questions - StangNet 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. FORD GT40p 4 BAR HEADS IN GOOD CONDITION w/ONE BOLT BROKEN #3::: Do your homework,get quality parts,dont skimp. bmcdaniel, Feb 17, 2004 #7. v8maverick Member. by travis Sun May 03, 2020 8:33 am. 331/347 stroker w/gt40p's, waste?Hp?cost involved? - Maverick The heads also required some machine work, including screw-in studs, guideplates, and widening the spring pockets for bigger valvesprings. 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. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. This needs to be removed and different exhaust valves, retainers, and valve springs added to turn this into a decent street head. JavaScript is disabled. 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! And agree the cams do help and a few tricks with the heads that I have discovered really make a difference. Mustang Cylinder Head & Camshaft Guide (79-95) - LMR $700.98. Add a distributor designed for a carbureted 302 but make sure to install the correct distributor gear for your cam. I have managed to get 402 horse power from a 289 hipo natural aspirated. JavaScript is disabled. Come join the discussion about popular models such as the Mustang, Galaxie, Falcon, Fairlane, Torino, Shelby and many more! this is the price for one head. This website is using a security service to protect itself from online attacks. 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. You need to check. 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. Worst AFR 165 dyno ever | Factory Five Racing Forum JEGS High Performance. 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:?:!?!?!? What Cam and Springs to Use for GT40 Heads 289 or 351 heads on a 302 advantage? | The H.A.M.B. They are more expensive than standard head gaskets, but they also do the job and are worth the additional money. GT40P heads, what kind of performance do they give? Once the headers are in place, then you can consider if you still want more power. However there are plenty of factory heads that with the help of an experienced machine shop can be great. people can stop saying that adding aftermarket cam with stock heads is a waste of time. 1996-2001 Ford Explorer 5.0L V8 Specifications As noted, this is looking like hes building a 351 Lightning truck motor, which is a good way to go. REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS. All costing in the end at least another $2k. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. 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. 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. A COMP hydraulic roller cam we found works well with this combination. never messed with the timing, its at 35* total . Tim's junkyard refugee survived the beating and we had a bitchin' story. Click to reveal Torque on the other hand isnt something to write home about. The Fora platform includes forum software by XenForo. The hardest part of swapping the cam was just getting the timing cover off and back on again. 99 Explorer engine (302) with GT40P heads - Ford Muscle Cars Tech Forum So . 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. 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 SBF OEM | eBay Motors, Parts & Accessories, Car & Truck Parts & Accessories | eBay! Install a used set of 5.0L Mustang "shorty" headers, generally available at auto swap meets for a reasonable price. GT40, GT40P, would be great factory heads. It's an 86 roller 5.0 engine that had a recent rebuild sometime in the past with keith black pistons, otherwise stock. If you smooth out the bowls and exhaust ports and gasket match the intakes they should flow decent. Compare. But the part about a cam replacement possibly being a labor intensive undertaking is correct. This is not a criticism but instead consider it to be more of a heads-up. 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. In less than an hour, we were ready to test. 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? Small-block Fords and Mopars only use four head bolts per cylinder, so retaining proper head-gasket sealespecially with nitrousis a point that demands attention, so we ordered a set of Fel-Pro MLS head gaskets rather than a standard, composition gasket. Ive been building ENGINES for 40+ years. 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. this head fits years 95-01 explorer mountaineer mercury mountaineer . 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. Well also assume that this engine is running stock exhaust manifolds. 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 kit offers adjustable power from 50 to 250 hp with a simple jet change. Long tube headers are a terrific idea, but you need to open up the exhaust side. BONUS TEST-FOUR DIFFERENT 302 INTAKES.. I'll prob take a trip up there this weekend after scavenging the junkyards, thanks a million. I'd get the gt40 setup, and put an s trim on it. check out the. Yea. 02-11-2012, 07:16 PM #6 fiveoh 86lx When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 1983 Mustang G.T. This is an older thread, you may not receive a response, and could be reviving an old thread. $169.50. Shop by category. #1:::Throw out all your Magazines that suggest what to do! . This combination should be good for about 400 horsepower and as much as 500 if you opt to use the stronger aftermarket pistons. Anythoughts? 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. Boy, were we surprised with the results. (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. HAD '82 GT monochromatic (red).black cloth HAVE This engine will be good for your 65 Mustang. What Are The GT40 & GT40P Heads? - LMR.com 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. Calculated compression to 9.8:1. Sponsored. Hey Motorheadty,Like your comments,question for ya,I have a 92 convertible,just bought a 5.0 out of a 94 gt that was just freshened up top end,gt40p heads w/new springs etc for the new E303 cam,new FRP roller lifters,Crane 1.7 rockers,hardened push rods,double roller timing set,all put on a bottom end w/104000 miles,needless to say previous owner pulled said engine after 800 miles and now building a 351,I pulled engine down my machinest,putting forged internals in and bolting everything back together,I want to run about a 150 shot N2o,and iam going carb,wondering which intake would be best w/the 150 shot,heard that dual planes might not be the way to go? Pretty sure that was name, but I could be wrong. Fastest e303 5.0l's? - FourEyedPride.com I have to agree, the GT40P heads flow better than the GT40 iron heads. 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. The Fora platform includes forum software by XenForo. Stock valve sizes? Even with relatively small valve sizes of 1.85-inch intake and 1.46-inch exhaust, the P-heads flow much better than previous. - I have a 1989 f150 with a 302 5 spd. Definitely going to use my P heads. Nice to see actual dyno results instead of "butt dyno" guesses. How to Get More Horsepower Out of a Ford 289 | It Still Runs Hey all, I'm working on building a 302 with my gt40p heads. 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. You can find them on later model Mercury Mountaineers and several other Ford SUV applications. The GT40P heads flow a lot better than stock 351 heads. Like I said lots of options. 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. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Without changing the stock pistons. Ford's seminal 302 engine (later re-dubbed the 5.0) has been popular with budget-minded hot rodders for decades. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. But don't think that adding a bigger camshaft will make more power. After graduating from Iowa State University with a journalism degree in 1978, he combined his two passions: cars and writing. are you twisted331 also? This will follow the guideline of a 1.6 rocker baseline and factory bottom end 79-95 related 5.0L Mustangs only. FORD, SMALL BLOCK 302 HO w/ E7, GT40P & GT40 - Alex's Parts Works on all factory cast iron E7, GT40, and GT40P cylinder heads! Nudge us with emails, and we'll make it happen. Related Resources Mustang Generation Nicknames: What Do They Mean? There are a couple of reasons for this suggestion. this head is complete with new 1.837 int valves and 1.536 exhaust valves. FORD GT40p 4 BAR HEADS IN GOOD CONDITION . I got a set of AFR heads , night and day. These heads have been remanufactured using refaced reclaimed Factory Valves. Gasoline/Diesel all makes on earth & still doing it today with great pride.Feel free to contact me anytime. Last Edit: January 18, 2015, 12:05:31 pm by businesstrader Logged shaunp. Commonly referred to as Explorer heads, GT-40P iron castings are found on current 5.0-equipped Explorers. Free shipping. 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) - anyone have experience with GT40P heads on a 92 351W - ive got a 92 F250 with a 351W that needs a pretty serious rebuild. 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. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. Test 1: 750-cfm carburetor, dual-plane intake manifold, and stock camshaft. Install a Ford Motorsport E303, X303 or F303 cam, or any of the similar units from Indy, Lunati or your favorite manufacturer. 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. Even with a stock Mustang 5.0 cam makes good power. We did the installation at Holten's place of employment, Motorworks, in Longwood, Florida. You could run a thinner head gasket as well. I got lucky and found a complete Explorer GT40P engine online. #2::: Get advice from a reptile engine builder with experience(first flag for me is when somebody refers to an ENGINE as a MOTOR! I guess I had it backwards, sorry about that, didn't mean to spread misinformation. Different years can have different combustion chamber sizes but ffor the most part there will be no performance increases by going with 302 heads. Just got through porting one of my gt40p heads today. This modification will help your late-model GT40P heads work better with the old-school carbureted intake setup. 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. Going from your heads to the GT40p heads will bump your compression by about a point.so hello bottom end torque. 1979 Indy 500 Pace Car. fordfan289, Aug 27, 2011 In mid-1997, the Explorer and Mountaineer 5.0 L heads were revised and renamed .
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