302 with gt40p heads horsepower

But the part about a cam replacement possibly being a labor intensive undertaking is correct. The 302 uses smaller 7/16" head bolts and your "P" heads may or may not require the step washers. Skip to main content. A forum community dedicated to Ford performance owners and enthusiasts. 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. Joined: Sun Mar 15, 2009 9:31 am. Im a different animal. Works on all factory cast iron E7, GT40, and GT40P cylinder heads! 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. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. SB Ford, GT40 .575" Lift Max Output II Drop in Valve Spring Kit, Hyd Roller, 140 Lb Seat. Really hurt too. 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. Every thing he tells you on this site is true. 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. 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. Do not ever, ever think about using the tube type manifolds. This needs to be removed and different exhaust valves, retainers, and valve springs added to turn this into a decent street head. 302 .030 over with; Scat Forged Steel Rods, SpeedPro pistons and rings . I just read about this build on the corral.net. If you can find individual flanged headers like the obsolete MAC headers had, those worked really well with GT40P's. These cast piston short-blocks are not quite as good as the forged piston 5.0L that came in Fox-body Mustangs, but the GT40P heads flow much better than earlier 5.0L heads. 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. Is asking advice for a fairly common situation involving parts with mandatory compatibility between the two for performance and longevity. 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. 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. Because of this, your tuneup will probably need to be modified. Add a distributor designed for a carbureted 302 but make sure to install the correct distributor gear for your cam. . made more power everytwhere and 40 hp is respectable. I have been working on Fords for 40 years and I have experimented with a few tricks of my own. That said there are some better aftermarket options for heads also. The reply has so many assumptions that I cant even assume to know the answer. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. A LOT of them do it these days. It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. Yeah, out of a bolt on upgrade, you'd probably be looking at 260-280rwhp ish with supporting mods. We will go into more detail on the head mods in a later story in Junkyard Builder, so watch for it. You might even say its like flogging a dead horse without any animals actually being injured during my moments of sarcasm. We did a quick search for hydraulic roller cams and landed on a COMP camshaft that looked promising. The Edelbrock Performer RPM is a good choice, but Holley, Weiand and Ford Motorsport also have similar offerings. The GT40 & GT40P heads had a few differences that are note-worthy, the most importantly being the bump in compression. The only one that's close, is #7. The gt40p head is considered the best OEM 302 head made. This pushed that little Ford to a peak horsepower of 503, and that was where we stopped. 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. It's an 86 roller 5.0 engine that had a recent rebuild sometime in the past with keith black pistons, otherwise stock. Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. Overview. 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. 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. this is the price for one head. Come join the discussion about popular models such as the Mustang, Galaxie, Falcon, Fairlane, Torino, Shelby and many more! Your email address will not be published. We set the timing to 34 degrees and rejetted the carburetor to get our desired 12.5:1 air/fuel ratio. 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. 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. Both swaps made more sense when parts were readily available at the bone yard for cheap. 402 HP NA from a HI PO 289 isnt that mysterious of a feat to accomplish with todays SBF Aftermarket parts availability. Over $2050 for the 165/185 renegades. Advanced: Daily Deals; Help & Contact; Sell; My eBay Expand My . the springs are new stock oem ford. Good on ya Jeff Smith. Most of the time, GT-40 heads are worth a good 20-40hp over stock heads. Cast iron GT40Ps as cast flow better than non-Ps due to revised plug location/angle. The 2 heads are about the same when looking at the numbers with the GT40p heads having a slight edge. Dennis Hilliard of Central Coast says we can expect to gain three-tenths in the quarter-mile. Depending on the Headers you have you might be okay. This is just a quick overview of the changes that need to be done. Weiand 7515 xcellerator intake. Good Luck. 1 - 7 of 7 Posts. Dec 8, 2011. Win or lose, if you buy the ticket you must take the ride. fuel injection system . At 4,300 rpm, the torque peaked at 348 lb-ft, a solid 20-lb-ft improvement, and the Lunati continued to outperform the stock cam all the way through with a peak horsepower increase of 60 hp at 354 hp at 5,700 rpm! If you dont feel comfortable doing this higher a pro. Check my post above. 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. Per a UEM tech support email I have the Icon IC736 is supposed to be good for GT40 heads when I asked about it. Through Central Coast you can have the heads fully prepped for your combination. #1:::Throw out all your Magazines that suggest what to do! Related Resources Mustang Generation Nicknames: What Do They Mean? Stock valve sizes? GT40p heads peak horsepower was [email protected] with 363ft/[email protected] The worked 351 heads showed peak . Let us explain. I am working on a set of iron GT40s hoping it goes faster. GT 500; Posts: 8496; Location: Brisbane . I have a 302 Windsor V8 EFI engine that I converted to a 600 cfm carburetor with a Street Warrior intake manifold. 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 '00 Ford Explorers and Mercury Moutaineers were factory equipped with one of Ford's better 5.0L motors. REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS. We did the installation at Holten's place of employment, Motorworks, in Longwood, Florida. They were located in Tahachapi CA, and were sold with upgraded springs for $650.00, back in 2002-2003 ish. T5 with 3.73s. could the gear of off the oil pump drive(i know they're DIS), for the explorer motor be used on his dizzy? This will keep you from dropping your overall static compression ratio and losing power. The GTp heads are like GT 40's with smaller combustion chambers and the spark plugs are relocated for a more efficient burn. There are too many variables to add to this regarding aftermarket stroker kits or components. Its increase while significant is still only about that of a decent 351 w, hi im building a nastalgic car so im not going to drag race it but it must go ok ive got a 302 windsor basicly recoed stock but i want to run tunnel rams to go with the the3am would like to put choppy cam and replace the heads any ideas would be much apprecited thankyou, What is the stock head cc of a 1992 f150 302 windsor. Features hardened 4140 Chromoly retainers, valve locks, spring shims, a spring height gauge, valve seals, and instructions. +1 I would go with the regular GT40 heads. But don't think that adding a bigger camshaft will make more power. Yea. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Always the weak area in the 289 and 302 is the tiny 5/16 inch connecting rod bolts and the miniscule intake and exhaust ports. 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. 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. AFR 165cc 58cc Heads. And remember ENGINES have been being built/rebuilt/modified for years. We were cruising the 'yard a while back and located a 2000 Ford Explorer with an EFI 5.0L V-8 engine. What would be the best cam and springs to use for these heads in a 302 Windsor? Joined . Don't let the fact that the iron GT40 heads have a larger exhaust valve fool you. In addition, the cam timing was designed for torque, with duration somewhere around 190 degrees at 0.050 with roughly 0.450-inch lift. However I think the opportunity window is slowly closing. i have a 302 engine from a 1977 granada and i am wondering if gt40p heads from an explorer will fit on this motor. '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 However, when we dyno'd the car before installing the GT-40P heads, the fan was on the car. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. AFR 165 Heads | Have options for pedestal mounted rocker arms or stud mounted rocker arms. You could run a thinner head gasket as well. Even with a stock Mustang 5.0 cam makes good power. I need that part number too! 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). These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. Test 1: 750-cfm carburetor, dual-plane intake manifold, and stock camshaft. 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. Now he serves as a regular contributor to OnAllCylinders. 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. 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). I guess I had it backwards, sorry about that, didn't mean to spread misinformation. We also added a veteran Ford magnetic pickup distributor and used it to drive an MSD ignition system. Not bad for off the shelf parts and a stock shortblock. I got a set of AFR heads , night and day. Last Edit: January 18, 2015, 12:05:31 pm by businesstrader Logged shaunp. If you know him, ask him. The reason this new generation of Ford engines make a ton more power is they also enjoy fantastic cylinder heads and four valves per cylinder. 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. Cant wait to try um out. Calculating pushrod length Free shipping for many products! On the power side, we selected 400 hp as an impressive but reasonable output for our small-block 5.0L Ford. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. FULL DYNO RESULTS. I have to agree, the GT40P heads flow better than the GT40 iron heads. Late-model ford GT40 and GT40P heads with 1.84-inch intake valves will also flow 185 cfm at 0.50 . thats after 3 hours of idling/midrange hits to tune the idle and part throttle . (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. BONUS TEST-FOUR DIFFERENT 302 INTAKES.. With nitrous, this is easily a mid-11-second ride. There was an article in Hot Rod magazine in the mid '80's where Jon Kaase was developing 351w packages. 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. 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. #3::: Do your homework,get quality parts,dont skimp. You gave me the info I was looking for, and I really do appreciate it. What did the heads flow? 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. All costing in the end at least another $2k. Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more! JEGS High Performance. Keywords hole size 302 is 7/16 and 351 is 1/2 Click to reveal 1983 Mustang G.T. SBF engines are modified constantly.

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