the springs are new stock oem ford. 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. i'd love to use these heads,. If I get different urges later, Ill pursue those then. 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. 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. A mild porting with gasket matching will be very good. That carbureted GT40P motor made 465 on th engine dyno with a .500" 239/244 camshaft, Holley 650 carb and Weiand Stealth intake. Its funny no one mentioned anything about ignition timing or components, Your email address will not be published. If you have a early 351W ie pre 76 it probably . Smith began writing for Car Craft magazine in 1979 and became editor in 1984. Early Windsors tend to have fairly restrictive exhaust manifolds, making the addition of a set of headers that much more efficient. Consider having the head's intake ports matched to the intake manifold gasket. Ford Factory 5.0 Performance Cylinder Heads. fordfan289, Aug 27, 2011 FULL DYNO RESULTS. Mac and Ford Motorsport both make a GT40P spacific header. Install a set of 1.7:1 roller-tipped rocker arms on the heads. Not looking for crazy HP. Stock valve sizes? The heads also required some machine work, including screw-in studs, guideplates, and widening the spring pockets for bigger valvesprings. 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. I added a link to it. Some ideas never go out of style. 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. SBF FORD Aluminum Cylinder Heads 302 /351w 190cc 62cc 2.02 /1.60 For ROLLER CAM. With the P-heads requiring pedestal-mount rockers, we also called up Crane Cams for a set of 1.6 pedestal-mount roller rockers. Joined . Related Resources Mustang Generation Nicknames: What Do They Mean? But what we were most impressed with was the solid gain in torque over the smaller Voodoo cam from 3,500 and up. Not when you can buy a set of Promaxx or AFR Enforcer heads for $1000, that already have decent hardware included. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 1986 Short block with notched pistons. $169.50. #3::: Do your homework,get quality parts,dont skimp. 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. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Long tube headers are a terrific idea, but you need to open up the exhaust side. Not bad for off the shelf parts and a stock shortblock. Save narve00 If we subtract the 20 hp that the fan is worth, we end up with a gain of 25 hp. Gt40 heads/intake from a jy explorer, leave the . 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. Compare. 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. We know what you're thinking--only two-tenths from an extra 45 hp? Im now thinking of adding a cam to match the carb. I got lucky and found a complete Explorer GT40P engine online. You might even say its like flogging a dead horse without any animals actually being injured during my moments of sarcasm. For a better experience, please enable JavaScript in your browser before proceeding. They were located in Tahachapi CA, and were sold with upgraded springs for $650.00, back in 2002-2003 ish. That's a good combo in my book. I guess someone could just do a basic valve job and throw on the GT40 upper/lower intake for a cheap HP boost. #2::: Get advice from a reptile engine builder with experience(first flag for me is when somebody refers to an ENGINE as a MOTOR! Learn how your comment data is processed. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. 1983 Mustang G.T. Pretty sure that was name, but I could be wrong. 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. Those are really good numbers. FORD GT40p 4 BAR HEADS IN GOOD CONDITION . There is a better way. What did the heads flow? As usual, there is much more to this story. Add a distributor designed for a carbureted 302 but make sure to install the correct distributor gear for your cam. Holley 670 street avenger carb. Build Thread 1965 Fastback Project "Racesteed". Once the headers are in place, then you can consider if you still want more power. First, adding headers will improve power on the existing combination. Yeah, except those. a) ain't early and b) aren't 289 heads. The entire front accessory drive and timing chain cover must be removed, along with the distributor and intake manifold. 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. 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. Like I said lots of options. never messed with the timing, its at 35* total . I wouldnt recommend reusing lifters though. But don't think that adding a bigger camshaft will make more power. 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. 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. Cant wait to try um out. Dec 8, 2011. 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. However there are plenty of factory heads that with the help of an experienced machine shop can be great. Or just play it safe and let the fans ask away about another daring 5.0 TB bolt on or for an exciting surprise, do a LS______ fill in the blanks. The 302 uses smaller 7/16" head bolts and your "P" heads may or may not require the step washers. (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. Someone does make the Tri-Y's headers for the early Mustangs using the "P" heads. 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. people can stop saying that adding aftermarket cam with stock heads is a waste of time. Tim's junkyard refugee survived the beating and we had a bitchin' story. You can have your current 28 oz rebalanced to 50. For the first test, we were reusing the stock Explorer cam, so the engine didn't need any break-in time. 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. Check my post above. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. Also, the spark plug angle makes it a pain. GT40P heads, what kind of performance do they give? I turned it because it was tired when I got it. Really hurt too. The only way to really make more power is to go with a stroker kit, blower and/or heads. Assemble the rotating assembly with a stock 5.0L crankshaft, a set of 5.0L rods and the specified pistons with stock-type rings. We will go into more detail on the head mods in a later story in Junkyard Builder, so watch for it. He'll have to get a gear for his distributor. Im new and Im 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. 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. The GT40P cylinder heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. Using the manufacturer recommended springs for your camshaft are a safe bet. I'll prob take a trip up there this weekend after scavenging the junkyards, thanks a million. Then why did you port the heads and how do you know if you made an improvement. We gained 45 hp and 40 lb-ft of torque. If you're going to use the stock 289 heads, install 1.84-inch intake valves, then port the intake and exhaust; these mods will net you about 185 cfm of intake port flow at 0.50 lift. Both have very similar valve sizes, but the GT40P head has slightly larger combustion chambers for a small bump in compression and better flow. This is a function of the somewhat wider lobe-separation angle of 112 degrees. 302 explorer short block with roughly 80k miles GT40's from a local u pull n pay ($97) weiand x-celerator trick flow stage 1 cam 650 holley double pumper car made 322/329 SAE . 1.7 shaft rockers and beehives. I had those on my car before I upgraded and they were nice heads. 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 SBF OEM | eBay Motors, Parts & Accessories, Car & Truck Parts & Accessories | eBay! how much HP and torque? I am very happy too. In less than an hour, we were ready to test. Finally, we exchanged the Explorer's EFI manifold (which is a pretty good manifold in its own right) for an Edelbrock Performer RPM Air Gap intake and a Holley 750-cfm HP-style carburetor. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. So I've got the motor and heads already for my maverick project. GT40p heads peak horsepower was [email protected] with 363ft/[email protected] The worked 351 heads showed peak .
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