the engine is carburated of that makes a difference. In addition, the cam timing was designed for torque, with duration somewhere around 190 degrees at 0.050 with roughly 0.450-inch lift. 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. All costing in the end at least another $2k. How much HP and torque do you think I. 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. I wouldnt recommend reusing lifters though. If you go with a diffrent cam, make sure you change springs, The Trick Flow kit comes with everything for around $130. SBF FORD Aluminum Cylinder Heads 302 /351w 190cc 62cc 2.02 /1.60 For ROLLER CAM. I view the GT40P heads similar to Granada brakes. Start with any 302 block, but try to find one from 1985 and up since it will already have provisions for a roller camshaft. 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. Very true about finding them at the local yards. Tim's junkyard refugee survived the beating and we had a bitchin' story. 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. 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. Sponsored. I may do some port matching and a little cleanup, otherwise just a set of springs and cam and see what I have. This needs to be removed and different exhaust valves, retainers, and valve springs added to turn this into a decent street head. 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 modification will help your late-model GT40P heads work better with the old-school carbureted intake setup. This is just a quick overview of the changes that need to be done. 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 . $700.98. Nudge us with emails, and we'll make it happen. I used Lightning heads on my 302, (GT40 not P) with stock rockers on a flat tappet engine. That's a good combo in my book. 02-11-2012, 07:16 PM #6 fiveoh 86lx Seriously though if you're not planning on an all-out attack for HP, I'd consider a forged piston out of Probe's SRS line-up. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. i'd love to use these heads,. Some ideas never go out of style. Test 2: Changed to the smaller of the two Lunati camshaftsno other changes. HAD '82 GT monochromatic (red).black cloth HAVE Joined: Sun Mar 15, 2009 9:31 am. As with all head installations, check piston-to-valve clearance before final startup. Step 1. Richard Holdener 240K subscribers Subscribe 63K views 1 year ago WESTECH PERFORMANCE GROUP LOW BUCK, GT40P 5.0L HEADS-CHEAP &. 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. 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. Holten tells us removing the fan is worth two-tenths in itself, which tells us the fan soaks up roughly 20 hp. SB Ford GT40 Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. LOW-BUCK 302 FORD HEAD UPGRADE - YouTube These are among the best of the iron Ford Windsor heads as they tend to flow much better than earlier castings. Free shipping. He'll have to get a gear for his distributor. 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. 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. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. 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. Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - GT40P heads? Gasoline/Diesel all makes on earth & still doing it today with great pride.Feel free to contact me anytime. Understanding Ford's Fox Body GT40 Cylinder Heads - CJ Pony Parts 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. 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. Advanced: Daily Deals; Help & Contact; Sell; My eBay Expand My . If there isnt room without disassembling half the front clip on the car, then it might be easier to remove the engine and do the conversion that way. This will keep you from dropping your overall static compression ratio and losing power. SBF engines are modified constantly. For this reason, we're not sure what kind of boost the GT-40P heads will give. How to Get More Horsepower Out of a Ford 289 | It Still Runs There are too many variables to add to this regarding aftermarket stroker kits or components. This is what I recommend to everyone who is doing a budget 5.0 build. (Image/Harrison Creamery). The cost of a new set of standard replacement roller lifters is very affordable at major retailers like Summit. Not bad for off the shelf parts and a stock shortblock. Ford 302W / 5.0L History & Specifications - The Ranger Station I am working on a set of iron GT40s hoping it goes faster. 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. Install a used set of 5.0L Mustang "shorty" headers, generally available at auto swap meets for a reasonable price. Mar 23, 2004. JavaScript is disabled. 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. #2::: Get advice from a reptile engine builder with experience(first flag for me is when somebody refers to an ENGINE as a MOTOR! However there are plenty of factory heads that with the help of an experienced machine shop can be great. 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. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. I plan on running a AFM b31 cam too which has relatively small duration for the intake valve. The reply has so many assumptions that I cant even assume to know the answer. T5 with 3.73s. 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. Yea. Do not ever, ever think about using the tube type manifolds. 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. 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. On the power side, we selected 400 hp as an impressive but reasonable output for our small-block 5.0L Ford. You can have your current 28 oz rebalanced to 50. I added a link to it. Not *as* good as the GT40p heads, but I'd prefer to not have to worry about exhaust fitment issues, or have a narrow range of what I can work with. Definitely going to use my P heads. THANKS VERY MUCH! You just want to keep it out of detonation. For a better experience, please enable JavaScript in your browser before proceeding. Ill do springs and a moderate cam and go for a good, dependable power plant. The multiple-layer steel construction allows the gasket to conform to movement between the cylinder head and block while maintaining a good seal. Compare. $169.50. Thanks. 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). 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. He'd be the best source. 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. We didn't increase the valve size, although we did have to add Manley valves to get the proper spring-installed height. 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. Required fields are marked *. The only way to really make more power is to go with a stroker kit, blower and/or heads. Your IP: GT40P heads, what kind of performance do they give? 68stang351 Founding Member May 16, 2002 850 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. 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! 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. All manufactured using advanced CNC technology for the extreme durability and precision required of the modern canted valve Ford Small Block at power levels around the 1000 mark reached during recent competitions at the EMC and at the strip. Cloudflare Ray ID: 7a2e2d95dedea1e4 We will go into more detail on the head mods in a later story in Junkyard Builder, so watch for it. Note the head bolt hole issue, some GT40 iron heads had 1/2 holes, if not they will need to be enlarged. 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. Take the assembly to a machine shop to have it balanced and install it in the block. 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. I had a set of 69 302 heads I ran for a while . gt40p heads on a 289 in a 66 | Vintage Mustang Forums how hard to put on? I got rid of the carburetor and went with a F.A.S.T. This is needed for the steel roller cam. This time around, we chose a shining example of this junkyard art form. Over $2050 for the 165/185 renegades. We guarantee plenty of burnout action when you add GT-40P heads to your 5.0 Mustang. We did a quick search for hydraulic roller cams and landed on a COMP camshaft that looked promising. '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 GTp heads are like GT 40's with smaller combustion chambers and the spark plugs are relocated for a more efficient burn. Within a few hours of his discovery, the engine was sitting in the back of his truck on its way to a new home. 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. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. The reason for this is that we're actually replacing mildly worked E7TE heads. Mac and Ford Motorsport both make a GT40P spacific header. I'm sure the dyno operator used some goofball correction factor to make the numbers look higher. I'll prob take a trip up there this weekend after scavenging the junkyards, thanks a million. 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. This website is using a security service to protect itself from online attacks. 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. Yeah, out of a bolt on upgrade, you'd probably be looking at 260-280rwhp ish with supporting mods. At the dragstrip, we gained two-tenths and 2 mph. (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. For real performance, stock E7TE heads leave a lot to be desired. I have a 5.0 from a 1992 Mustang in my 65. For both the GT40 and GT40p heads, I STRONGLY suggest upgrading the valve springs. Cant wait to try um out. many thanks to all you eco-hippies giving me dirty looks and helping me feel llike an overall badass rebel. This will follow the guideline of a 1.6 rocker baseline and factory bottom end 79-95 related 5.0L Mustangs only. How to Build a Cheap Drag Racing 302 Ford Motor | It Still Runs When you purchase through links on our site, we may earn an affiliate commission, which supports our community. What did the heads flow? Using the manufacturer recommended springs for your camshaft are a safe bet. 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. 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. Runs well. I am sure you have increased the bore size and possibly even the stroke a bit and spin it up pretty high in the RPM range. JUNKYARD GT40P HEADS-ADD 30+ HP TO YOUR 5.0L (FOR FREE?) Thank You. 1983 Mustang G.T. 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. Slover primarily focused on the exhaust side of the GT40P heads. 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. Yeah, except those. a) ain't early and b) aren't 289 heads. The engine never huffed oil out of the breathers, and the spark plugs all looked excellent. Once you get into the FoMoCo aftermarket aluminum GT40s though, all bets are off. Here a comparison of different heads on a 302: I'm very happy with my GT40P. 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. 302 .030 over with; Scat Forged Steel Rods, SpeedPro pistons and rings . Im now thinking of adding a cam to match the carb. I'm using the Trick Flow stage 1 cam with 1.7 roller rockers. Took me 7 hours to do one head.but they cleaned up real nice. Its NA but makes use of AFR heads and some other aftermarket goodies. $139.99. GT40p heads peak horsepower was [email protected] with 363ft/[email protected] The worked 351 heads showed peak . We've seen what happens from previous Ford experience when power levels above 500 hp tend to either pop head gaskets or saw blocks in half. #3::: Do your homework,get quality parts,dont skimp. I went to a couple in Tucson and almost all the Ford vehicles that came with a 5.0 had the heads missing. Check my post above. this is the price for one head. at the crank. 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. Here is my setup. These are a great head but do need some machining mods to make they really work well. The factory heads have a boss for the exhaust valve that restricts flow through the exhaust port. This pushed that little Ford to a peak horsepower of 503, and that was where we stopped. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. It's a classic move we've pulled off many times. You need to check. Purchase any used aftermarket manifold for the 302 that is designed to function in the 3,500 to 6,500 power band. I spin it to 6500 and thats about it. Free shipping for many products! 68 Mustang GT/CS Highland Green, PS, PB & Console, C Code w/C4 & 3.55 8 rear, If you aren't using the GT40P's stock, with maybe a spring upgrade and valve job, they aren't worth it anymore. In mid-1997, the Explorer and Mountaineer 5.0 L heads were revised and renamed . You didnt mention which cam you had in mind. Their weak point is that the rotator used on the exhaust valve is very thick. We gained 45 hp and 40 lb-ft of torque. Through Central Coast you can have the heads fully prepped for your combination. This is a common mistake with first-time cam buyers who dont necessarily appreciate that the cam is just one component of the overall engine package. For a better experience, please enable JavaScript in your browser before proceeding. The GT40P cylinder heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. If we subtract the 20 hp that the fan is worth, we end up with a gain of 25 hp. The tube headers showed a gain of almost 100 hp! Most of them are aware of what changes need to be completed. The headers will improve this airflow throughout the entire rpm rangeadding more torque and horsepower. It's an 86 roller 5.0 engine that had a recent rebuild sometime in the past with keith black pistons, otherwise stock. Overview. T5z and 3.89 9" TL rear. 351W with GT40P heads? | Mercury Cougar Owners I can tell you that with my 9.503 block, 22cc dished pistons and 64cc heads, I'm at 9.5:1 compression. However, when we dyno'd the car before installing the GT-40P heads, the fan was on the car. 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. For a better experience, please enable JavaScript in your browser before proceeding. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. The spark plug issue is almost a non-issue. 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. Build Thread 1965 Fastback Project "Racesteed". Maybe I'll think about a cam swap? There are caveats to this plan, however. Really hurt too. *** 65 Mustang 351C 4v, AOD, 4.11 gears *** 66 Galaxie convert big block. anyone have experience with GT40P heads on a 92 351W This test went so well that we were eager to see what the slightly bigger cam would do. 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. thats after 3 hours of idling/midrange hits to tune the idle and part throttle . Depending on the Headers you have you might be okay. how much HP and torque? 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.
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