As noted, this is looking like hes building a 351 Lightning truck motor, which is a good way to go. GT40P heads? how hard to put on? how much HP and torque? BONUS TEST-FOUR DIFFERENT 302 INTAKES.. Im now thinking of adding a cam to match the carb. The spark plug issue is almost a non-issue. Test 2: Changed to the smaller of the two Lunati camshaftsno other changes. This engine will be good for your 65 Mustang. Choose a cylinder head before you install the pistons. 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. I must agree with Jeff Smith. Yep my **** is coming apart again Isnt life great! We didn't increase the valve size, although we did have to add Manley valves to get the proper spring-installed height. 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. 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. 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. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. Trick Flow Mustang Valve Spring Upgrade Kit - Cast Iron Head (79-95) Upgrading Fox Body Cylinder Heads - AmericanMuscle.com There are literally a dozen or so camshaft companies that offer a mild hydraulic roller cam for a 5.0L Ford. 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. If you have a early 351W ie pre 76 it probably . If they are cheap enough, take them anyway. A trip to Orlando Speed World provided us with updated quarter-mile times. Like I said lots of options. For both the GT40 and GT40p heads, I STRONGLY suggest upgrading the valve springs. Different years can have different combustion chamber sizes but ffor the most part there will be no performance increases by going with 302 heads. We were cruising the 'yard a while back and located a 2000 Ford Explorer with an EFI 5.0L V-8 engine. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. The MPH was there to run a little better but the local track is about terrible. I've not seen a set of longtubes that have an issue with GT40P's, either. Yeah, except those. a) ain't early and b) aren't 289 heads. Actually the regular gt40's in either aluminum or iron are the good ones but the gt40p's are only a slight improvement over regular 302 heads. 302 with GT40 heads | Ford Mustang Forums There are caveats to this plan, however. Works on all factory cast iron E7, GT40, and GT40P cylinder heads! A solid 300-325 hp should be plenty and that's with good drivability and reliability as well. For a better experience, please enable JavaScript in your browser before proceeding. For a better experience, please enable JavaScript in your browser before proceeding. Check my post above. The specs are a conservative 212/218 degrees of duration at 0.050-inch tappet lift but offer a really nice 0.512-inch valve lift for both the intake and exhaust. This website is using a security service to protect itself from online attacks. We guarantee plenty of burnout action when you add GT-40P heads to your 5.0 Mustang. There was an article in Hot Rod magazine in the mid '80's where Jon Kaase was developing 351w packages. T5 with 3.73s. Im a different animal. A forum community dedicated to Ford performance owners and enthusiasts. I spin it to 6500 and thats about it. Not sure about that but got some pictures of the cast iron explorer manifolds on a 302. Once the headers are in place, then you can consider if you still want more power. Don't let the fact that the iron GT40 heads have a larger exhaust valve fool you. Torque on the other hand isnt something to write home about. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. How to Build a Budget 383 Stroker Chevy How do I Increase Horsepower on a 440 Cylinder Head Specifications for a 1969 How to Get More Power Out of a 92 4.3 dragster engine image by Robert Young from, Copyright 2023 Leaf Group Ltd. / Leaf Group Media. (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. #1:::Throw out all your Magazines that suggest what to do! 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. fuel injection system . Never not once have I ever seen a SBF rod bolt create a failure. - I have a 1989 f150 with a 302 5 spd. I have a 302 Windsor V8 EFI engine that I converted to a 600 cfm carburetor with a Street Warrior intake manifold. Install a set of 1.7:1 roller-tipped rocker arms on the heads. The GT40 & GT40P heads had a few differences that are note-worthy, the most importantly being the bump in compression. I just read about this build on the corral.net. These are among the best of the iron Ford Windsor heads as they tend to flow much better than earlier castings. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. 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. 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. The HP DIFF column on the far right lists the horsepower difference between Test 1 and Test 3. Install a used set of 5.0L Mustang "shorty" headers, generally available at auto swap meets for a reasonable price. We compare the GT40s to modern cylinder heads as well as other heads from the era. However, stepping up in the performance head market will set you back more than $1,200 for a decent pair of aluminum castings--and that's straight out of the box, with no porting. . This test went so well that we were eager to see what the slightly bigger cam would do. Ill do springs and a moderate cam and go for a good, dependable power plant. Let us explain. With the engine reassembled, we boxed up our second camshaft and headed for Westech's dyno. 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. Performance & security by Cloudflare. 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. Sponsored. I have a 5.0 from a 1992 Mustang in my 65. Some ideas never go out of style. A forum community dedicated to vintage Ford Mustang owners and enthusiasts. In mid-1997, the Explorer and Mountaineer 5.0 L heads were revised and renamed . 331/347 stroker w/gt40p's, waste?Hp?cost involved? - Maverick Just make sure it is a roller cam. GT40, GT40P, would be great factory heads. Your IP: A forum community dedicated to Ford Mustang owners and enthusiasts. If you smooth out the bowls and exhaust ports and gasket match the intakes they should flow decent. Add a distributor designed for a carbureted 302 but make sure to install the correct distributor gear for your cam. 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. check out the. They also have emissions legal heads as well. Take the assembly to a machine shop to have it balanced and install it in the block. Early Windsors tend to have fairly restrictive exhaust manifolds, making the addition of a set of headers that much more efficient. The engine never huffed oil out of the breathers, and the spark plugs all looked excellent. Paying a premium for a set of GT40P heads or dumping money into some to get their performance to rival aftermarket is not for me. timing and compression ratio with gt40p heads - Modded Mustang Forums They work, but present their own challenges. Purchase a set of flat top pistons (from Ford Motorsport, TRW or Keith Black) with machined valve reliefs and designed to provide 10:1 compression with a 59 to 60 cc combustion chamber cylinder head. 69.90.139.244 Build Thread 1965 Fastback Project "Racesteed". 68 XR7 & 68 M-100. Mac and Ford Motorsport both make a GT40P spacific header. That's more than enough to feed a power-brake booster. are you twisted331 also? But the part about a cam replacement possibly being a labor intensive undertaking is correct. All this is worth it. 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 action you just performed triggered the security solution. The engine was only rated at 215 hp, but it at least had 9.0:1 compression. Yea. 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? Obviously, tuneups will vary. 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. Ford 302W / 5.0L History & Specifications - The Ranger Station REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS | What's New I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. i have a 302 engine from a 1977 granada and i am wondering if gt40p heads from an explorer will fit on this motor. Everything fits, use the stock rockers and pushrods. The tube headers showed a gain of almost 100 hp! 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 don't need tons of power to enjoy the car. I guess someone could just do a basic valve job and throw on the GT40 upper/lower intake for a cheap HP boost. They are more expensive than standard head gaskets, but they also do the job and are worth the additional money. The heads that were used were also old C8 casting with 58cc chambers. 99 Explorer engine (302) with GT40P heads - Ford Muscle Cars Tech Forum Posted on May 07, 2014 by promarengine. Hey all, I'm working on building a 302 with my gt40p heads. That carbureted GT40P motor made 465 on th engine dyno with a .500" 239/244 camshaft, Holley 650 carb and Weiand Stealth intake. 950.00 us a set and will ship . i've got a short block started, and i recently came across a set of GT40P heads for FREE ( love family members). 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. Anyways, I know the gt40ps will bump . $930.00 + $55.00 shipping. The car weighs #2835 with driver. With. This is an older thread, you may not receive a response, and could be reviving an old thread. If I remember right, non of the GT40P's (later models) had the thermactor smog provisions. 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. Here is my setup. In 1987, he assumed the role of editor for Hot Rod magazine before returning to his first love of writing technical stories. (Image/Harrison Creamery). All Ford Mustangs | Model Specific Forums, GT-40P Heads - 5.0 Mustang & Super Fords Magazine. JavaScript is disabled. Over $2050 for the 165/185 renegades. First, adding headers will improve power on the existing combination. JavaScript is disabled. The multiple-layer steel construction allows the gasket to conform to movement between the cylinder head and block while maintaining a good seal. at the crank. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. You need to check. You didnt mention what camshaft you would be choosing or exactly which 5.0L Ford Windsor engine you are working with. Budget 300HP 302 Build LOW-BUCK 302 FORD HEAD UPGRADE - YouTube In less than an hour, we were ready to test. 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. If you dont feel comfortable doing this higher a pro. Purchase any used aftermarket manifold for the 302 that is designed to function in the 3,500 to 6,500 power band. 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. Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! Well offer one as an example. Similar to regular GT-40 heads, the biggest difference between the two is that the P-heads feature a revised spark plug angle which extends the plug into the combustion chamber, putting the flame front close to the absolute center of the chamber, resulting in a smoother combustion process. As usual, there is much more to this story. 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. Cloudflare Ray ID: 7a2e2d95dedea1e4 gt40p headers | Maverick/Comet Forums i'd love to use these heads,. This time around, we chose a shining example of this junkyard art form. never messed with the timing, its at 35* total . AFR 165cc 58cc Heads. that is a healthy budget deal. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. Definitely going to use my P heads. We also added an Edelbrock Performer RPM dual-plane intake and a set of 158-inch headers with no mufflers. will gt40p heads fit on a 302 | Ford Mustang Forum $700.98. The GT40P heads flow a lot better than stock 351 heads.

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