Along with the heads, we used MAC headers for GT-40P heads. It turned out we were conservative on both counts. If I remember right, non of the GT40P's (later models) had the thermactor smog provisions. this head fits years 95-01 explorer mountaineer mercury mountaineer . Assemble the rotating assembly with a stock 5.0L crankshaft, a set of 5.0L rods and the specified pistons with stock-type rings. All Ford Mustangs | Model Specific Forums, GT-40P Heads - 5.0 Mustang & Super Fords Magazine. GT40P heads, what kind of performance do they give? 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. As usual, there is much more to this story. For this reason, we're not sure what kind of boost the GT-40P heads will give. We will go into more detail on the head mods in a later story in Junkyard Builder, so watch for it. The fix: basic power upgrades for a sluggish 302 331/347 stroker w/gt40p's, waste?Hp?cost involved? - Maverick Both have very similar valve sizes, but the GT40P head has slightly larger combustion chambers for a small bump in compression and better flow. at the crank. GT-40 heads HP increase | Mustang Forums at StangNet GT40 vs GT40P: Who has Smaller Chamber Volume ! More compression Richard Rowe has been writing professionally since 2007, specializing in automotive topics. All this is worth it. I'm sure the dyno operator used some goofball correction factor to make the numbers look higher. Car Craft mag. 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. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. Slover primarily focused on the exhaust side of the GT40P heads. But the part about a cam replacement possibly being a labor intensive undertaking is correct. 302 with GT40 heads | Ford Mustang Forums 1.7 shaft rockers and beehives. Yeah, except those. a) ain't early and b) aren't 289 heads. 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. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more! Works on all factory cast iron E7, GT40, and GT40P cylinder heads! anyone have experience with GT40P heads on a 92 351W If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. This needs to be removed and different exhaust valves, retainers, and valve springs added to turn this into a decent street head. timing and compression ratio with gt40p heads - Modded Mustang Forums Mar 23, 2004. LOW-BUCK 302 FORD HEAD UPGRADE Richard Holdener 239K subscribers 189K views 2 years ago WESTECH PERFORMANCE GROUP WHAT'S IT WORTH? Related Resources Mustang Generation Nicknames: What Do They Mean? You can email the site owner to let them know you were blocked. Stock 93-95 Cobra shortblock (stock cobra cam), GT40X heads, 1.7 rockers, Edelbrock Performer RPM intake, Holley 650, and longtube headers. Most of them are aware of what changes need to be completed. thats after 3 hours of idling/midrange hits to tune the idle and part throttle . 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. Cast iron GT40Ps as cast flow better than non-Ps due to revised plug location/angle. I turned it because it was tired when I got it. Not when you can buy a set of Promaxx or AFR Enforcer heads for $1000, that already have decent hardware included. Real world data seems to show that GT40 or GT40P cylinder heads, assuming no other mods on your Foxbody, are good to add anywhere between 20-40 HP (over stock heads). The cost of a new set of standard replacement roller lifters is very affordable at major retailers like Summit. As a matter of fact, Central Coast has an '89 coupe with GT-40P heads that has run a best of 11.98 in the quarter-mile. This will follow the guideline of a 1.6 rocker baseline and factory bottom end 79-95 related 5.0L Mustangs only. Sponsored. I am very happy too. (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. The only one that's close, is #7. 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. #2::: Get advice from a reptile engine builder with experience(first flag for me is when somebody refers to an ENGINE as a MOTOR! Here is my setup. On the power side, we selected 400 hp as an impressive but reasonable output for our small-block 5.0L Ford. Overview. Dec 8, 2011. I don't need tons of power to enjoy the car. Torque on the other hand isnt something to write home about. 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. AFR 165 Heads | Have options for pedestal mounted rocker arms or stud mounted rocker arms. just curious. Click to reveal Going from your heads to the GT40p heads will bump your compression by about a point.so hello bottom end torque. There are too many variables to add to this regarding aftermarket stroker kits or components. REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS. ***Most important is theStupid question is the one that was never asked!*** With. He'll have to get a gear for his distributor. 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. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. If you have a early 351W ie pre 76 it probably . Jeff Smith: It would have been better to know a little bit more about your combination, but the short answer is yeswith a hydraulic roller camshaft, assuming the lifters are in good shape and the roller wheels show no unusual wear, they can be re-used on a new cam with no danger of adverse effects. 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. well i finally did my first ever carb build, ive always been an EFI guy Black 1985 GT: 408w, in the 6's in the 1/8 mile. The gt40p head is considered the best OEM 302 head made. Shop by category. Learn how your comment data is processed. For a better experience, please enable JavaScript in your browser before proceeding. REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS | What's New 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. Runs well. Because of this, your tuneup will probably need to be modified. Yes- thank you. GT40, GT40P, would be great factory heads. K.S. A bit of info for those looking to build 300+hp 5.0L/302s You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. 302 .030 over with; Scat Forged Steel Rods, SpeedPro pistons and rings . Have fun, be safe, enjoy. Theres many options available for a little more power. Maybe I'll think about a cam swap? 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? Yea. 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. Those heads were unported and had stock valve sizes! A forum community dedicated to Ford Mustang owners and enthusiasts. 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 heads also required some machine work, including screw-in studs, guideplates, and widening the spring pockets for bigger valvesprings. Vehicle: 1972 2 door 302 maverick, 1986 5.0 stang gt convertible,66 mustang coupe, HEMI ram. Because its all been done time after time after. 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. 1996-2001 Ford Explorer 5.0L V8 Specifications With the P-heads requiring pedestal-mount rockers, we also called up Crane Cams for a set of 1.6 pedestal-mount roller rockers. Different years can have different combustion chamber sizes but ffor the most part there will be no performance increases by going with 302 heads. JavaScript is disabled. 289 or 351 heads on a 302 advantage? | The H.A.M.B. Once you get into the FoMoCo aftermarket aluminum GT40s though, all bets are off. 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. I'll prob take a trip up there this weekend after scavenging the junkyards, thanks a million. that is a healthy budget deal. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. Cant wait to try um out. 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. Not looking for crazy HP. But don't think that adding a bigger camshaft will make more power. 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. Never not once have I ever seen a SBF rod bolt create a failure. Dennis Hilliard of Central Coast says we can expect to gain three-tenths in the quarter-mile. In mid-1997, the Explorer and Mountaineer 5.0 L heads were revised and renamed . The 5.0L with the GT40 head had a 9.0:1 compression, and the 5.0L with the GT40P head had 9.1:1 compression. PTP Engineering front suspension and 25540R17s all around. I added a link to it. Limited header choice is certainly a challenge. 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. You can find them on later model Mercury Mountaineers and several other Ford SUV applications. T5 with 3.73s. Get 500 Horsepower from a Junkyard Ford Explorer 302 - MotorTrend 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. Performance & security by Cloudflare. could the gear of off the oil pump drive(i know they're DIS), for the explorer motor be used on his dizzy? The rest went very smoothly, and we reused the stock lifters and suffered no ulcers worrying about breaking in the cam. Thanks. 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. In a lightweight Fox or early Mustang with a five-speed behind it, this would be a great little street engine. 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.
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