Gt40 heads/intake from a jy explorer, leave the . Then why did you port the heads and how do you know if you made an improvement. Just put some 1.7 pedistal rocker arm on along with a mild camshaft (make sure to use the correct valve springs), you will make over 300 flywheel hp. Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. We guarantee plenty of burnout action when you add GT-40P heads to your 5.0 Mustang. i'd love to use these heads,. Joined: Sun Mar 15, 2009 9:31 am. The heads also required some machine work, including screw-in studs, guideplates, and widening the spring pockets for bigger valvesprings. could the gear of off the oil pump drive(i know they're DIS), for the explorer motor be used on his dizzy? Best of all, no machining is required to install these on your stock cast iron heads! Going from your heads to the GT40p heads will bump your compression by about a point.so hello bottom end torque. 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. 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. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more! The GT40 and GT40P cylinder heads are highly sought after, but how do they stack up against other cylinder heads, and is it worth it to upgrade the Fox Body's stock heads? Well also assume that this engine is running stock exhaust manifolds.
Ford 302W / 5.0L History & Specifications - The Ranger Station Because its all been done time after time after. I had those on my car before I upgraded and they were nice heads. #3::: Do your homework,get quality parts,dont skimp. JEGS High Performance. And remember ENGINES have been being built/rebuilt/modified for years. I had a set of 69 302 heads I ran for a while . For the most part 302 heads and 351W heads are the same. how much HP and torque? The kit offers adjustable power from 50 to 250 hp with a simple jet change.
351W with GT40P heads? | Mercury Cougar Owners Everything fits, use the stock rockers and pushrods. You might even say its like flogging a dead horse without any animals actually being injured during my moments of sarcasm. 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. 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. Good on ya Jeff Smith. 1986 Short block with notched pistons. I'll save the effort and lighten my front end by 50# with aluminum. The best thing to do would be to use a specific break-in oil for the first 200 to 300 miles of use to reduce the change of a potential problem with undue wear. You gave me the info I was looking for, and I really do appreciate it. These timeslips are from 1280' above sea level. This modification will help your late-model GT40P heads work better with the old-school carbureted intake setup. 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. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. Free shipping. JUNKYARD GT40P HEADS-ADD 30+ HP TO YOUR 5.0L (FOR FREE?)
Upgrading Fox Body Cylinder Heads - AmericanMuscle.com Depends on the budget. In addition, the cam timing was designed for torque, with duration somewhere around 190 degrees at 0.050 with roughly 0.450-inch lift. We also discovered some issues with the GT40P heads that required changes, so we added valves from Manley that eliminated the exhaust-valve rotators and allowed us to set the proper valvespring installed height. There are a couple of reasons for this suggestion. Your email address will not be published. The rest went very smoothly, and we reused the stock lifters and suffered no ulcers worrying about breaking in the cam. *** 65 Mustang 351C 4v, AOD, 4.11 gears *** 66 Galaxie convert big block. 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.
87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 I'll prob take a trip up there this weekend after scavenging the junkyards, thanks a million. A LOT of them do it these days. Its funny no one mentioned anything about ignition timing or components, Your email address will not be published.
Ask Away! with Jeff Smith: Camshaft and Cylinder Head Recommendations 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. Ported Hurricane Single Plane and custom 750 HP. Those are really good numbers. Commonly referred to as Explorer heads, GT-40P iron castings are found on current 5.0-equipped Explorers. I have heard this rod bolt weakness myth for years but have yet to have a single problem with them in any of the SBF engines I have pounded on for the last 30 years and there have been lots of them. The question was whether we wanted a torquey small-block or a more cammed-up rpm engine to boost peak horsepower. 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. 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 combination of this cam with your intake and headers will produce a very nice street engine. T5z and 3.89 9" TL rear. 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. This combination should be good for about 400 horsepower and as much as 500 if you opt to use the stronger aftermarket pistons. 402 HP NA from a HI PO 289 isnt that mysterious of a feat to accomplish with todays SBF Aftermarket parts availability. (Please note these are not GT40P Explorer heads). If we subtract the 20 hp that the fan is worth, we end up with a gain of 25 hp. '85 GT vert two tone (white on charcoal)white leather, http://www.facebook.com/groups/233213650060739/, http://www.summitracing.com/parts/TFS-2500100/, ascMcLaren & Motorsport/Grand Prix IV Capris, RHD and Other International/Export Models, Mods, Maintenance & Mechanical FAQs/Archive, If this is your first visit, be sure to
The multiple-layer steel construction allows the gasket to conform to movement between the cylinder head and block while maintaining a good seal. Scorpion 1.6 roller rockers. Pride is built, in your garage, with your two hands. Perhaps even more surprising was how well this engine idled, calmly purring with 16 inches of manifold vacuum at 980 rpm. Check my post above. Yeah, out of a bolt on upgrade, you'd probably be looking at 260-280rwhp ish with supporting mods. This one added another 10 degrees of duration over the smaller Voodoo cam, along with 0.020 inch more intake valve lift. Now he serves as a regular contributor to OnAllCylinders.
99 Explorer engine (302) with GT40P heads - Ford Muscle Cars Tech Forum These are some of the pictures I have showing the Explorer manifolds. Theres many options available for a little more power. You can have your current 28 oz rebalanced to 50. Holley 670 street avenger carb. Free shipping. If I get different urges later, Ill pursue those then.
The Edelbrock Performer RPM is a good choice, but Holley, Weiand and Ford Motorsport also have similar offerings. FORD GT40p 4 BAR HEADS IN GOOD CONDITION . 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. AFR 165 Heads | Have options for pedestal mounted rocker arms or stud mounted rocker arms.
Junkyard Gt40p Heads-add 30+ Hp to Your 5.0l (For Free?) LOW-BUCK 302 FORD HEAD UPGRADE Richard Holdener 239K subscribers 189K views 2 years ago WESTECH PERFORMANCE GROUP WHAT'S IT WORTH? bmcdaniel, Feb 17, 2004 #7. v8maverick Member. Yea. This is an older thread, you may not receive a response, and could be reviving an old thread. The dyno recorded a peak horsepower reading of 489 hp, but the air/fuel ratio was slightly on the rich side at 11.5:1, so we increased the nitrous jet to a 61 and hit the button again. Different years can have different combustion chamber sizes but ffor the most part there will be no performance increases by going with 302 heads. I don't need tons of power to enjoy the car. Required fields are marked *. For a better experience, please enable JavaScript in your browser before proceeding. I guess someone could just do a basic valve job and throw on the GT40 upper/lower intake for a cheap HP boost. Purchase any used aftermarket manifold for the 302 that is designed to function in the 3,500 to 6,500 power band. Test 2: Changed to the smaller of the two Lunati camshaftsno other changes. I bought a crate 302 from Downs Ford a few years ago that was producing 320 hp.
302 with GT40 heads | Ford Mustang Forums 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. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. In mid-1997, the Explorer and Mountaineer 5.0 L heads were revised and renamed . The spark plug issue is almost a non-issue. Works on all factory cast iron E7, GT40, and GT40P cylinder heads! The only one that's close, is #7. Gasoline/Diesel all makes on earth & still doing it today with great pride.Feel free to contact me anytime. Once the headers are in place, then you can consider if you still want more power.
289 or 351 heads on a 302 advantage? | The H.A.M.B. Rowe studied engineering, philosophy and American literature at Central Florida Community College. Save narve00 I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads.