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. I have to agree, the GT40P heads flow better than the GT40 iron heads. These are among the best of the iron Ford Windsor heads as they tend to flow much better than earlier castings. Because of this, your tuneup will probably need to be modified. Im 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. 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. 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. Not to mention, they will run circles around GT40P's out of the box. T5 with 3.73s. I don't need tons of power to enjoy the car. Get 500 Horsepower from a Junkyard Ford Explorer 302 - MotorTrend Boy, were we surprised with the results. I'm new and I'm currently building a 302 on a budget and want to raise compression without milling heads but by pistons and I want to get close to 10:1. All costing in the end at least another $2k. We did a quick search for hydraulic roller cams and landed on a COMP camshaft that looked promising. Test 2: Changed to the smaller of the two Lunati camshaftsno other changes. Performance & security by Cloudflare. I got lucky and found a complete Explorer GT40P engine online. this head is complete with new 1.837 int valves and 1.536 exhaust valves. The gt40p head is considered the best OEM 302 head made. #2::: Get advice from a reptile engine builder with experience(first flag for me is when somebody refers to an ENGINE as a MOTOR! While we've seen engine dyno tests performed with GT-40P heads replacing factory E7TE castings and resulting in a boost of more than 25 hp, we have reluctantly set our horsepower gain goal at 25 ponies, as well. You'll have to plug the oil hole that is in the engine from the old oil dipstick. Torque on the other hand isnt something to write home about. Last Edit: January 18, 2015, 12:05:31 pm by businesstrader Logged shaunp. Those are really good numbers. I have a 432 HP non Hi Po 289 I built. 1983 Mustang G.T. What you are trying to do is to increase the amount of airflow through the engine in order to make more power. Most of the time, GT-40 heads are worth a good 20-40hp over stock heads. The engine never huffed oil out of the breathers, and the spark plugs all looked excellent. With the tuning finalized, the little cam made far more power than we expected, cranking out 328 lb-ft of torque at 4,200 and 294 hp at 5,400 rpm. This pushed that little Ford to a peak horsepower of 503, and that was where we stopped. You might even say its like flogging a dead horse without any animals actually being injured during my moments of sarcasm. 1 - 7 of 7 Posts. Im a different animal. If I remember right, non of the GT40P's (later models) had the thermactor smog provisions. I may do some port matching and a little cleanup, otherwise just a set of springs and cam and see what I have. Small Block Ford 289/302/5.0L/351w 180cc/60cc Aluminum Cylinder Head E42004. 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. In addition, the cam timing was designed for torque, with duration somewhere around 190 degrees at 0.050 with roughly 0.450-inch lift. $930.00 + $55.00 shipping. 302 with GT40 heads | Ford Mustang Forums You keep stock drivability, and stock gas milage if you can stay out of boost. Now he serves as a regular contributor to OnAllCylinders. Buy the lifters for peace of mind now and hopefully for the duration. this is the price for one head. 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. The hardest part of swapping the cam was just getting the timing cover off and back on again. This combination should be good for about 400 horsepower and as much as 500 if you opt to use the stronger aftermarket pistons. E303 Cam advanced 4 degrees. Add 40 to 70 HP to your 302 yourself - Factory Five Racing Forum Yeah, out of a bolt on upgrade, you'd probably be looking at 260-280rwhp ish with supporting mods. The action you just performed triggered the security solution. 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. just curious. They work, but present their own challenges. I got rid of the carburetor and went with a F.A.S.T. 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! Keep in mind that swapping camshafts is a fairly extensive effort. The entire front accessory drive and timing chain cover must be removed, along with the distributor and intake manifold. And remember ENGINES have been being built/rebuilt/modified for years. Not sure about that but got some pictures of the cast iron explorer manifolds on a 302. How to Build a Cheap Drag Racing 302 Ford Motor | It Still Runs 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. timing and compression ratio with gt40p heads - Modded Mustang Forums GT40P heads, what kind of performance do they give? 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. With. Perhaps even more surprising was how well this engine idled, calmly purring with 16 inches of manifold vacuum at 980 rpm. Building 400hp Into A 5.0L Small-Block Engine - MotorTrend Don't let the fact that the iron GT40 heads have a larger exhaust valve fool you. 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. You didnt mention what camshaft you would be choosing or exactly which 5.0L Ford Windsor engine you are working with. Supercharging GT40p heads | Modded Mustang Forums We've already been motivated to put this engine in a buddy's Mustang. If you're running a stock cam, 1.7 rockers will work perfectly. Here is my setup. Scorpion 1.6 roller rockers. You can use the stock roller lifters with any size cam you want. Have fun, be safe, enjoy. This is an older thread, you may not receive a response, and could be reviving an old thread. 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. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. FORD, SMALL BLOCK 302 HO w/ E7, GT40P & GT40 - Alex's Parts Upgrading Fox Body Cylinder Heads - AmericanMuscle.com I recall having an absolute blast with my old K-code coupe back in the day. GT40P heads? how hard to put on? how much HP and 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. Calculating pushrod length Anyways, I know the gt40ps will bump . Stock 1989 5.0L HO pistons will work if you can find them. 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. A solid 300-325 hp should be plenty and that's with good drivability and reliability as well. . 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. The rest went very smoothly, and we reused the stock lifters and suffered no ulcers worrying about breaking in the cam. Commonly referred to as Explorer heads, GT-40P iron castings are found on current 5.0-equipped Explorers. 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. I need that part number too! Once you get into the FoMoCo aftermarket aluminum GT40s though, all bets are off. We heated the bottle to 950 psi and hit the button at 4,500 rpm. 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. There is a better way. Slover primarily focused on the exhaust side of the GT40P heads. I turned it because it was tired when I got it. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Required fields are marked *. (Image/Harrison Creamery). Yank a motor out of the junkyard, clean it up, add a camshaft, intake, and a carburetor, and see how much power we can squeeze out of it. 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. The multiple-layer steel construction allows the gasket to conform to movement between the cylinder head and block while maintaining a good seal. 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. We were cruising the 'yard a while back and located a 2000 Ford Explorer with an EFI 5.0L V-8 engine. 1983 Mustang G.T. If you know him, ask him. That said there are some better aftermarket options for heads also. However I think the opportunity window is slowly closing. I plan on running a AFM b31 cam too which has relatively small duration for the intake valve. 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. For real performance, stock E7TE heads leave a lot to be desired. I went to a couple in Tucson and almost all the Ford vehicles that came with a 5.0 had the heads missing. So I've got the motor and heads already for my maverick project. With no other changes we gained 25 hp using factory iron heads. 950.00 us a set and will ship . In mid-1997, the Explorer and Mountaineer 5.0 L heads were revised and renamed . I just read about this build on the corral.net. 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). Pretty sure that was name, but I could be wrong. A LOT of them do it these days. Dennis Hilliard of Central Coast says we can expect to gain three-tenths in the quarter-mile. 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. Ford Explorer Mountaineer 5.0 Ohv Iron 302 Sbf How to Get More Horsepower Out of a Ford 289 | It Still Runs You just want to keep it out of detonation. Assemble the rotating assembly with a stock 5.0L crankshaft, a set of 5.0L rods and the specified pistons with stock-type rings. These timeslips are from 1280' above sea level. They almost seem like flywheel numbers rather than RWHP numbers. LOW-BUCK 302 FORD HEAD UPGRADE Richard Holdener 239K subscribers 189K views 2 years ago WESTECH PERFORMANCE GROUP WHAT'S IT WORTH? 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. HAD '82 GT monochromatic (red).black cloth HAVE Because its all been done time after time after. Ask Away! with Jeff Smith: Camshaft and Cylinder Head Recommendations Dyno results GT40P heads | Vintage Mustang Forums SB Ford, GT40 .575" Lift Max Output II Drop in Valve Spring Kit, Hyd Roller, 140 Lb Seat. A forum community dedicated to vintage Ford Mustang owners and enthusiasts. If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. FULL DYNO RESULTS. Ported Hurricane Single Plane and custom 750 HP. The spark plug issue is almost a non-issue. Can anyone give me a little feedback about a '99 Explorer 5.0, and tell me if it's my answer. Assuming the above configurationa pushrod 5.0L will potentially make between 250 and 260 hp. GT40P Heads how much hp from them. - StangNet There was an article in Hot Rod magazine in the mid '80's where Jon Kaase was developing 351w packages. The cost of a new set of standard replacement roller lifters is very affordable at major retailers like Summit. If you smooth out the bowls and exhaust ports and gasket match the intakes they should flow decent. Assorted screwdrivers, pliers and vise-grips. 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. Some ideas never go out of style. I guess someone could just do a basic valve job and throw on the GT40 upper/lower intake for a cheap HP boost. I have been working on Fords for 40 years and I have experimented with a few tricks of my own. 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. Really hurt too. Depends on the budget. This needs to be removed and different exhaust valves, retainers, and valve springs added to turn this into a decent street head. are you twisted331 also? You need to check. The later model distributors had a different diameter shaft than the earlier ones. I view the GT40P heads similar to Granada brakes. Note the head bolt hole issue, some GT40 iron heads had 1/2 holes, if not they will need to be enlarged. And agree the cams do help and a few tricks with the heads that I have discovered really make a difference. I got a set of AFR heads , night and day. 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. Just got through porting one of my gt40p heads today. 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. 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. If I get different urges later, Ill pursue those then. 69.90.139.244 This is a function of the somewhat wider lobe-separation angle of 112 degrees. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. If you have a early 351W ie pre 76 it probably . Do not ever, ever think about using the tube type manifolds. GT40, GT40P, would be great factory heads. could the gear of off the oil pump drive(i know they're DIS), for the explorer motor be used on his dizzy? You can email the site owner to let them know you were blocked.

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