302 with gt40p heads horsepower302 with gt40p heads horsepower
The Edelbrock Performer RPM is a good choice, but Holley, Weiand and Ford Motorsport also have similar offerings. A bone stock 2bbl early 351w with stock replacement forged pistons (9.0 compression) and dyno headers made 211 Hp . 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. You can have your current 28 oz rebalanced to 50. The gt40p head is considered the best OEM 302 head made. First, adding headers will improve power on the existing combination. 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. For 2018, the Coyote makes 460 hp. You didnt mention the car this engine is in, but lets assume there is enough room to remove the radiator and any other coolers and perhaps some or all of the front grille and/or brackets before the cam has sufficient room to exit the front of the engine. I have been working on Fords for 40 years and I have experimented with a few tricks of my own. 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. Someone does make the Tri-Y's headers for the early Mustangs using the "P" heads. 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. 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. This website is using a security service to protect itself from online attacks. 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. fuel injection system . It took him and yours truly eight hours from start to finish, using air tools and a lift to gain access to the header flanges. These engines came with the GT40P head, which even with its small valves, offers really good performance. Took me 7 hours to do one head.but they cleaned up real nice. If this is beyond your technical ability, you could ask a local machine shop to perform the modifications. This time around, we chose a shining example of this junkyard art form. 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. Purchase any used aftermarket manifold for the 302 that is designed to function in the 3,500 to 6,500 power band. 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. Over $2050 for the 165/185 renegades. GT40P heads, what kind of performance do they give? One benefit gt40P head will have over other 80's-90's model heads, including the gt40 head, is that it has a smaller combustion chamber much like the original 289 heads. If I get different urges later, Ill pursue those then. Along with the heads, we used MAC headers for GT-40P heads. We were cruising the 'yard a while back and located a 2000 Ford Explorer with an EFI 5.0L V-8 engine. Also, the spark plug angle makes it a pain. 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. Nice to see actual dyno results instead of "butt dyno" guesses. Not when you can buy a set of Promaxx or AFR Enforcer heads for $1000, that already have decent hardware included. We guarantee plenty of burnout action when you add GT-40P heads to your 5.0 Mustang. .. i would not buy valves unless you need them amd would not switch to studs with these heads for your low hp . A LOT of them do it these days. Ford offered a performance head that was a stock part on 1993-1995 Mustang Cobra models and pre- 1997-1/2 Ford Explorers and Mercury Mountaineers equipped with the 5.0 L engine called the GT-40 head (casting ID F3ZE-AA). This is just a quick overview of the changes that need to be done. Step 1. As usual, there is much more to this story. I was looking at putting on the GT40P heads on. You can find them on later model Mercury Mountaineers and several other Ford SUV applications. 68stang351 Founding Member May 16, 2002 850 Not sure how they would mate up to your existing exhuast, but otherwise they should work. never messed with the timing, its at 35* total . The later model distributors had a different diameter shaft than the earlier ones. We decided on a Powerstar kit from Nitrous Supply, owned by our good friend Mike Thermos, who was one of the original nitrous kit suppliers back in the early '80s. I'd get the gt40 setup, and put an s trim on it. You can use the stock roller lifters with any size cam you want. i've got a short block started, and i recently came across a set of GT40P heads for FREE ( love family members). HiPo manifolds and Ill be good. If they are cheap enough, take them anyway. 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. Good Luck. 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. He'd be the best source. $139.99. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Here is my setup. I had those on my car before I upgraded and they were nice heads. The spark plug issue is almost a non-issue. Have fun, be safe, enjoy. The only way to really make more power is to go with a stroker kit, blower and/or heads. Adding the headers may also require a slight increase in secondary (and possibly primary) jetting to ensure the proper air-fuel ratio, but thats also an easy tuning change. 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. Late-model ford GT40 and GT40P heads with 1.84-inch intake valves will also flow 185 cfm at 0.50 . JavaScript is disabled. Choose a cylinder head before you install the pistons. #3::: Do your homework,get quality parts,dont skimp. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Stock 1989 5.0L HO pistons will work if you can find them. Despite adding 30 degrees of intake duration, this cam improved torque throughout the entire test from 3,000 rpm on up. We've already been motivated to put this engine in a buddy's Mustang. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. Ill do springs and a moderate cam and go for a good, dependable power plant. A mild porting with gasket matching will be very good. 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. Application Fits 1979-95 Mustang 302/351 w/ OEM Small Block Ford Heads What you are trying to do is to increase the amount of airflow through the engine in order to make more power. Long tube headers are a terrific idea, but you need to open up the exhaust side. 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. Weiand 7515 xcellerator intake. After a couple grand you have a killer set of heads, but there's got to be a less-expensive way of making horsepower. The heads also required some machine work, including screw-in studs, guideplates, and widening the spring pockets for bigger valvesprings. SB Ford GT40 Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. Install a used set of 5.0L Mustang "shorty" headers, generally available at auto swap meets for a reasonable price. 1 - 7 of 7 Posts. Here is the lowdown on exhaust manifolds and VALVE SPRINGS. A forum community dedicated to Ford Mustang owners and enthusiasts. Ive been building ENGINES for 40+ years. Stock 93-95 Cobra shortblock (stock cobra cam), GT40X heads, 1.7 rockers, Edelbrock Performer RPM intake, Holley 650, and longtube headers. Headers and a camshaft will help but the engine really needs aftermarket 3/8 inch connecting rod bolts and aftermarket cylinder heads. 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. But don't think that adding a bigger camshaft will make more power. 402 HP NA from a HI PO 289 isnt that mysterious of a feat to accomplish with todays SBF Aftermarket parts availability. I am working on a set of iron GT40s hoping it goes faster. $169.50. In less than an hour, we were ready to test. I just read about this build on the corral.net. Ported Hurricane Single Plane and custom 750 HP. LOW-BUCK 302 FORD HEAD UPGRADE Richard Holdener 239K subscribers 189K views 2 years ago WESTECH PERFORMANCE GROUP WHAT'S IT WORTH? There are a lot of variables that must be addressed to give a better estimate, but a good basic estimate is 20-40 HP at the crank. 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. . 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. United Engine and Machine sells cheap but decent pistons that will do what you're wanting. The older pushrod engines just dont offer the same kind of power potential for their displacement and it all has to do with cylinder head flow. Install a set of 1.7:1 roller-tipped rocker arms on the heads. If you wanted to make your engine feel strong, these would be a decent investment, but they will require some modifications. JavaScript is disabled. Small Block Ford 289/302/5.0L/351w 180cc/60cc Aluminum Cylinder Head E42004. You'll also have to use your 289 timing chain cover since it has a hole for the oil dip stick and fuel pump. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. people can stop saying that adding aftermarket cam with stock heads is a waste of time. 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. Instructions on porting the GT-40p heads here. 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. THANKS VERY MUCH! Perhaps even more surprising was how well this engine idled, calmly purring with 16 inches of manifold vacuum at 980 rpm. many thanks to all you eco-hippies giving me dirty looks and helping me feel llike an overall badass rebel. Then why did you port the heads and how do you know if you made an improvement. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. Calculating pushrod length The factory heads have a boss for the exhaust valve that restricts flow through the exhaust port. Their weak point is that the rotator used on the exhaust valve is very thick. They almost seem like flywheel numbers rather than RWHP numbers. 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. Build Thread 1965 Fastback Project "Racesteed". You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. 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. This 1979-1995 Mustang cylinder head and camshaft guide will overview the heads and cams we offer and how they will coincide. Let us explain. With. 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. A forum community dedicated to vintage Ford Mustang owners and enthusiasts. Note the head bolt hole issue, some GT40 iron heads had 1/2 holes, if not they will need to be enlarged. Commonly referred to as Explorer heads, GT-40P iron castings are found on current 5.0-equipped Explorers. 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. JUNKYARD GT40P HEADS-ADD 30+ HP TO YOUR 5.0L (FOR FREE?) 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. Last Edit: January 18, 2015, 12:05:31 pm by businesstrader Logged shaunp. 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. 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. Well assume it is a 5.0L with stock heads. They are more expensive than standard head gaskets, but they also do the job and are worth the additional money. All in all, the addition of GT-40P heads to any 5.0 Mustang is a worthwhile venture, especially if you're on a budget (aren't we all) or shooting for the Trophy Stock title. I spin it to 6500 and thats about it. 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. Calculated compression to 9.8:1. . The 302 uses smaller 7/16" head bolts and your "P" heads may or may not require the step washers. Ford Factory 5.0 Performance Cylinder Heads. Joined: Sun Mar 15, 2009 9:31 am. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. We set the timing to 34 degrees and rejetted the carburetor to get our desired 12.5:1 air/fuel ratio. In addition, the cam timing was designed for torque, with duration somewhere around 190 degrees at 0.050 with roughly 0.450-inch lift. how much HP and torque? SBF FORD Aluminum Cylinder Heads 302 /351w 190cc 62cc 2.02 /1.60 For ROLLER CAM. MAC is the only manufacturer of these headers, and the parts we installed fit like a glove with no problems whatsoever. SB Ford, GT40 .575" Lift Max Output II Drop in Valve Spring Kit, Hyd Roller, 140 Lb Seat. Boy, were we surprised with the results. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Runs well. hole size 302 is 7/16 and 351 is 1/2 Both swaps made more sense when parts were readily available at the bone yard for cheap. The SUV indicated barely 120,000 on the clock, and after yanking the valve covers to judge the engine's condition, Tim Moore instantly made the decision to do the boneyard version of a smash-and-grab.
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302 with gt40p heads horsepower