Well also assume that this engine is running stock exhaust manifolds. 68 XR7 & 68 M-100. Richard Rowe has been writing professionally since 2007, specializing in automotive topics.
GT40 Heads On A 289? | Ford Muscle Cars Tech Forum MAC is the only manufacturer of these headers, and the parts we installed fit like a glove with no problems whatsoever. If we subtract the 20 hp that the fan is worth, we end up with a gain of 25 hp. The 2 heads are about the same when looking at the numbers with the GT40p heads having a slight edge. Enter your search keyword. I've got gt40p heads for it I'll be running, and can't afford better . I wouldnt recommend reusing lifters though. Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - GT40P heads? Depends on the budget. The engine was only rated at 215 hp, but it at least had 9.0:1 compression. Yes Mr.Smith, your column here at OAC adorned with extreme performance without power adders, or all Engine as its known, from a superior pushrod Small Block featuring almost all USA sourced modern components with the familiar smell of Ford Blue. 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. Now we know why Dennis Hilliard of Central Coast Mustang is so high on these heads. A trip to Orlando Speed World provided us with updated quarter-mile times. Like I said lots of options.
289 or 351 heads on a 302 advantage? | The H.A.M.B. 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. Advanced: Daily Deals; Help & Contact; Sell; My eBay Expand My . After we installed the heads and with the fan off, he ran a 12.46 at 107.9. Cant wait to try um out. Sponsored. I'm wondering how these heads will interact with the paxton 1220 sl supercharger I'm trying to put on. Gt40 heads/intake from a jy explorer, leave the . SBF FORD Aluminum Cylinder Heads 302 /351w 190cc 62cc 2.02 /1.60 For ROLLER CAM. 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.
Upgrading Fox Body Cylinder Heads - AmericanMuscle.com The only failures Ive had were timing chains and a couple broken rods in a mid 80s 302 with 200,000 miles on it that got about 35 lbs of boost stuffed into it when a pop off valve I bought on ebay failed. Early Windsors tend to have fairly restrictive exhaust manifolds, making the addition of a set of headers that much more efficient. You can have your current 28 oz rebalanced to 50. The Fora platform includes forum software by XenForo. Their weak point is that the rotator used on the exhaust valve is very thick. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. 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. On the power side, we selected 400 hp as an impressive but reasonable output for our small-block 5.0L Ford. $930.00 + $55.00 shipping. You didnt mention what camshaft you would be choosing or exactly which 5.0L Ford Windsor engine you are working with. A COMP hydraulic roller cam we found works well with this combination. The valve seats have been cut on a . You just want to keep it out of detonation. As usual, there is much more to this story. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. There are literally a dozen or so camshaft companies that offer a mild hydraulic roller cam for a 5.0L Ford.
302HO with gt40p heads | Mustang Forums at StangNet If I remember right, non of the GT40P's (later models) had the thermactor smog provisions. They almost seem like flywheel numbers rather than RWHP numbers. 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. I just read about this build on the corral.net. 402 HP NA from a HI PO 289 isnt that mysterious of a feat to accomplish with todays SBF Aftermarket parts availability. 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. You might even say its like flogging a dead horse without any animals actually being injured during my moments of sarcasm. I have to agree, the GT40P heads flow better than the GT40 iron heads.
With the GT-40P heads you will need to back off the timing a couple degrees and bump up the fuel pressure. It's a classic move we've pulled off many times. 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. 302 .030 over with; Scat Forged Steel Rods, SpeedPro pistons and rings . Weiand 7515 xcellerator intake. Stock valve sizes? AFR 165 Heads | Have options for pedestal mounted rocker arms or stud mounted rocker arms. I had a set of 69 302 heads I ran for a while . 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. 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. Mac and Ford Motorsport both make a GT40P spacific header. Mar 23, 2004. at the crank. The Fora platform includes forum software by XenForo. this head fits years 95-01 explorer mountaineer mercury mountaineer . THANKS VERY MUCH! $700.98. 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. 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. 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. Ford Factory 5.0 Performance Cylinder Heads. This test went so well that we were eager to see what the slightly bigger cam would do. There are too many variables to add to this regarding aftermarket stroker kits or components. that is a healthy budget deal.
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. Stock 1989 5.0L HO pistons will work if you can find them. Come join the discussion about popular models such as the Mustang, Galaxie, Falcon, Fairlane, Torino, Shelby and many more! Aside from the cost of the nitrous itself, this setup should cost you little more than a stock rebuild using all brand new parts. However there are plenty of factory heads that with the help of an experienced machine shop can be great. Through Central Coast you can have the heads fully prepped for your combination. The MPH was there to run a little better but the local track is about terrible. PTP Engineering front suspension and 25540R17s all around.
timing and compression ratio with gt40p heads - Modded Mustang Forums Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - anyone have experience with GT40P heads on a 92 351W - ive got a 92 F250 with a 351W that needs a pretty serious rebuild. Shop by category. Over $2050 for the 165/185 renegades. Note the head bolt hole issue, some GT40 iron heads had 1/2 holes, if not they will need to be enlarged. We need a build on a 400+ hp 302/6 build. I've not seen a set of longtubes that have an issue with GT40P's, either.
What Are The GT40 & GT40P Heads? - LMR.com Generally expect with a good cam, intake, roller rockers and a good ignition system to see around 300-350 max rear wheel horsepower, depending on what type of dyno you use. A solid 300-325 hp should be plenty and that's with good drivability and reliability as well. This is not a criticism but instead consider it to be more of a heads-up. i'd love to use these heads,. K.S. However, stepping up in the performance head market will set you back more than $1,200 for a decent pair of aluminum castings--and that's straight out of the box, with no porting. We started with a 120,000-mile 5.0L out of a Ford Explorer, removed the EFI and DIS, and pocket ported the stock GT40P iron heads with stock valve sizes. Check my post above. Your email address will not be published. . Would have liked to see a comparison done on the same short block using a set of decently-ported early non-Thermactor iron heads Tracy Blackford, 65 Mustang FB, 331 built with 289 H beam rods and 383W piston, 282S cam, self ported '70 351w heads, Dougs Tri-Y headers. This engine will be good for your 65 Mustang. 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. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. Not to mention, they will run circles around GT40P's out of the box.
Supercharging GT40p heads | Modded Mustang Forums P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. Because its all been done time after time after. There are caveats to this plan, however. The combination of this cam with your intake and headers will produce a very nice street engine.
Stock Ford 351W 4bbl dyno numbers - Don Terrill's Speed-Talk ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. Performance & security by Cloudflare. For a better experience, please enable JavaScript in your browser before proceeding. JavaScript is disabled. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Going from your heads to the GT40p heads will bump your compression by about a point.so hello bottom end torque. 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.
REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS | What's New Your IP: If you wanted to make your engine feel strong, these would be a decent investment, but they will require some modifications. Once the headers are in place, then you can consider if you still want more power. Car Craft mag. 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? This is an older thread, you may not receive a response, and could be reviving an old thread. For this reason, we're not sure what kind of boost the GT-40P heads will give. For 2018, the Coyote makes 460 hp. They work, but present their own challenges. He'd be the best source. 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. What did the heads flow? Dennis Hilliard of Central Coast says we can expect to gain three-tenths in the quarter-mile. For real performance, stock E7TE heads leave a lot to be desired. We've already been motivated to put this engine in a buddy's Mustang. Holley 670 street avenger carb. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. The GT40P heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. 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 "P" heads flow better. We did a quick search for hydraulic roller cams and landed on a COMP camshaft that looked promising. Step 2. Ha! the engine is carburated of that makes a difference. And have discovered something that I dont think anyone else knows. 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. Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more! The gt40p head is considered the best OEM 302 head made. I'm also have the regular GT40 heads on my current build.
Gt40p heads - FourEyedPride.com If you smooth out the bowls and exhaust ports and gasket match the intakes they should flow decent. Actually the regular gt40's in either aluminum or iron are the good ones but the gt40p's are only a slight improvement over regular 302 heads. For a better experience, please enable JavaScript in your browser before proceeding. Can anyone give me a little feedback about a '99 Explorer 5.0, and tell me if it's my answer. 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. #3::: Do your homework,get quality parts,dont skimp. Holten runs the factory fan, but he had removed it when he ran the 12.63. With nitrous, this is easily a mid-11-second ride. And agree the cams do help and a few tricks with the heads that I have discovered really make a difference. Test 3: Installed the larger Lunati camagain, no other changes. this is the price for one head. However, theres a distinct possibility that I might pull all of my hair out if I see another in-depth article explaining how I, along with just over a billion other desperate humans seeking answers, need special valve spring split locks for my next tired Chevy build. Along with the heads, we used MAC headers for GT-40P heads.
99 Explorer engine (302) with GT40P heads - Ford Muscle Cars Tech Forum All this is worth it. If I get different urges later, Ill pursue those then. 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. Instructions on porting the GT-40p heads here. Over $2050 for the 165/185 renegades. 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. 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). Assemble the rotating assembly with a stock 5.0L crankshaft, a set of 5.0L rods and the specified pistons with stock-type rings. GT40, GT40P, would be great factory heads. Torque on the other hand isnt something to write home about. Save narve00 I guess someone could just do a basic valve job and throw on the GT40 upper/lower intake for a cheap HP boost. This is the main reason why these engines are not modified as much as the small block Chevy. It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. This needs to be removed and different exhaust valves, retainers, and valve springs added to turn this into a decent street head. Buy the lifters for peace of mind now and hopefully for the duration. JEGS High Performance. This will keep you from dropping your overall static compression ratio and losing power. I'd get the gt40 setup, and put an s trim on it.
Ford 302W / 5.0L History & Specifications - The Ranger Station These engines came with the GT40P head, which even with its small valves, offers really good performance. With the P-heads requiring pedestal-mount rockers, we also called up Crane Cams for a set of 1.6 pedestal-mount roller rockers. Everything fits, use the stock rockers and pushrods. And remember ENGINES have been being built/rebuilt/modified for years. Win or lose, if you buy the ticket you must take the ride. Most of the time, GT-40 heads are worth a good 20-40hp over stock heads.
GT40P Heads how much hp from them. - StangNet gt40p headers | Maverick/Comet Forums If they are cheap enough, take them anyway. But don't think that adding a bigger camshaft will make more power.
Mild Build Gt40p I need that part number too! Yea. Well that article just got me very ancy, I want these heads!! A good port job can set you back another $500-$1,000. Theres many options available for a little more power. Obviously, tuneups will vary. I have been working on Fords for 40 years and I have experimented with a few tricks of my own.