With no other changes we gained 25 hp using factory iron heads. Good Luck. I would like to know what heads, cam and intake manifold combination to use for the most HP I can squeeze out of that motor. Works on all factory cast iron E7, GT40, and GT40P cylinder heads! We then dyno'd the car without the fan to get some consistency and were rewarded with a peak of 316 hp at 5,500 rpm, and 348 lb-ft of torque at 4,000 rpm. In addition, the cam timing was designed for torque, with duration somewhere around 190 degrees at 0.050 with roughly 0.450-inch lift. You should be able to get away with a 150 to 200 horsepower shot later, but it's best to start out small and work up. Where they differ is the combustion chamber size. While the heads were off getting a massage, we turned our attention to the cam timing. 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. Since the engine is nearly stock, we would want to choose a relatively mild camshaft with somewhat more lift and duration than stock, but again not going too aggressive. Well offer one as an example. Car Craft mag. Come join the discussion about popular models such as the Mustang, Galaxie, Falcon, Fairlane, Torino, Shelby and many more! The asterisk HP differences are calculated using Test 1's 294-hp peak. SB Ford, GT40 .575" Lift Max Output II Drop in Valve Spring Kit, Hyd Roller, 140 Lb Seat. SBF FORD Aluminum Cylinder Heads 302 /351w 190cc 62cc 2.02 /1.60 For ROLLER CAM. Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more! Perhaps even more surprising was how well this engine idled, calmly purring with 16 inches of manifold vacuum at 980 rpm. Nudge us with emails, and we'll make it happen. Pride is built, in your garage, with your two hands. Anyways, I know the gt40ps will bump . Upgrading Fox Body Cylinder Heads - AmericanMuscle.com 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. For the most part 302 heads and 351W heads are the same. 1983 Mustang G.T. Really hurt too. JavaScript is disabled. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. Limited header choice is certainly a challenge. 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. 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. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. Dyno results GT40P heads | Vintage Mustang Forums I am very happy too. I don't need tons of power to enjoy the car. Compare. I have a 432 HP non Hi Po 289 I built. This kind of improvement may not seem like much, but the owner of our test car, Jamie Holten, runs in FFW Trophy Stock where three-tenths is a lifetime. How to Get More Horsepower Out of a Ford 289 | It Still Runs I have managed to get 402 horse power from a 289 hipo natural aspirated. Choose a cylinder head before you install the pistons. The combination of this cam with your intake and headers will produce a very nice street engine. There are caveats to this plan, however. You'll have to plug the oil hole that is in the engine from the old oil dipstick. We gained 45 hp and 40 lb-ft of torque. Aftermarket headers, such as those made by Hooker, BBK and Competition Engineering, are better and are just as easy, if somewhat more expensive, to procure used. 97% Positive Feedback . VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS | What's New Take the assembly to a machine shop to have it balanced and install it in the block. Do not ever, ever think about using the tube type manifolds. Supercharging GT40p heads | Modded Mustang Forums built one using a 91' HO short block with a set of AFR 165 heads, Weiand . Also, the spark plug angle makes it a pain. Add a distributor designed for a carbureted 302 but make sure to install the correct distributor gear for your cam. Skip to main content. 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. Central Coast Mustang sells GT-40P heads at a great price, making them a viable alternative in a market flooded with performance head choices. Not bad for off the shelf parts and a stock shortblock. Most of the time, GT-40 heads are worth a good 20-40hp over stock heads. The action you just performed triggered the security solution. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 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. When building an engine there is a lot to take into consideration. The rest went very smoothly, and we reused the stock lifters and suffered no ulcers worrying about breaking in the cam. Like I said lots of options. That's more than enough to feed a power-brake booster. Yes- thank you. I added a link to it. You can find them on later model Mercury Mountaineers and several other Ford SUV applications. But the part about a cam replacement possibly being a labor intensive undertaking is correct. This combination should be good for about 400 horsepower and as much as 500 if you opt to use the stronger aftermarket pistons. Mustang Cylinder Head & Camshaft Guide (79-95) - LMR i have a 302 engine from a 1977 granada and i am wondering if gt40p heads from an explorer will fit on this motor. 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. The later model distributors had a different diameter shaft than the earlier ones. I have a 5.0 from a 1992 Mustang in my 65. Now he serves as a regular contributor to OnAllCylinders. For the first test, we were reusing the stock Explorer cam, so the engine didn't need any break-in time. Now we know why Dennis Hilliard of Central Coast Mustang is so high on these heads. Well that article just got me very ancy, I want these heads!! 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. 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? That's a 40 per cent increase in power from a simple head and cam swap, and one seriously happy Mustang owner! 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. Holten's best time is a 12.63 at 105.9 mph, and if we gain the desired result he will be right in the thick of things in Trophy Stock competition. Maybe I'll think about a cam swap? I ran the Speed Pro L2488 pistons and it had me around 9.9 compression with a .041 head gasket, Now I had GT40 heads milled .020 and so that's just a guess on the CC. 1986 Short block with notched pistons. The engine never huffed oil out of the breathers, and the spark plugs all looked excellent. 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. Because its all been done time after time after. 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. 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. For a better experience, please enable JavaScript in your browser before proceeding. The GT40P heads flow a lot better than stock 351 heads. We've already been motivated to put this engine in a buddy's Mustang. 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. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. 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. What Cam and Springs to Use for GT40 Heads 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:?:!?!?!? These are a great head but do need some machining mods to make they really work well. The tube headers showed a gain of almost 100 hp! LOW-BUCK 302 FORD HEAD UPGRADE - YouTube We did a quick search for hydraulic roller cams and landed on a COMP camshaft that looked promising. Cast iron GT40Ps as cast flow better than non-Ps due to revised plug location/angle. You didnt mention which cam you had in mind. I was looking at putting on the GT40P heads on. 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. Thanks. Here is the lowdown on exhaust manifolds and VALVE SPRINGS. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 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. $930.00 + $55.00 shipping. 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. Building 400hp Into A 5.0L Small-Block Engine - MotorTrend Both have very similar valve sizes, but the GT40P head has slightly larger combustion chambers for a small bump in compression and better flow. 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.
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