If you dont feel comfortable doing this higher a pro. Really hurt too. Yank a motor out of the junkyard, clean it up, add a camshaft, intake, and a carburetor, and see how much power we can squeeze out of it. This will keep you from dropping your overall static compression ratio and losing power. 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. They suffered from poor aftermarket support up until about 15 years ago when it really came on strong. Well offer one as an example. These are among the best of the iron Ford Windsor heads as they tend to flow much better than earlier castings. These are Ford iron GT-40P heads. Late-model ford GT40 and GT40P heads with 1.84-inch intake valves will also flow 185 cfm at 0.50 . Application Fits 1979-95 Mustang 302/351 w/ OEM Small Block Ford Heads K.S. This test went so well that we were eager to see what the slightly bigger cam would do. Have fun, be safe, enjoy. #2::: Get advice from a reptile engine builder with experience(first flag for me is when somebody refers to an ENGINE as a MOTOR! 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 have a 5.0 from a 1992 Mustang in my 65. 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. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. Ive been building ENGINES for 40+ years. Because of this, your tuneup will probably need to be modified. Perhaps even more surprising was how well this engine idled, calmly purring with 16 inches of manifold vacuum at 980 rpm. They are more expensive than standard head gaskets, but they also do the job and are worth the additional money. The GT40P heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. Within a few hours of his discovery, the engine was sitting in the back of his truck on its way to a new home. That's fantastic for the minimal investment we made. How to Build a Budget 383 Stroker Chevy How do I Increase Horsepower on a 440 Cylinder Head Specifications for a 1969 How to Get More Power Out of a 92 4.3 dragster engine image by Robert Young from, Copyright 2023 Leaf Group Ltd. / Leaf Group Media. For real performance, stock E7TE heads leave a lot to be desired. There are a couple of reasons for this suggestion. 69.90.139.244 Here is the lowdown on exhaust manifolds and VALVE SPRINGS. Install a set of 1.7:1 roller-tipped rocker arms on the heads. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. For a better experience, please enable JavaScript in your browser before proceeding. I may do some port matching and a little cleanup, otherwise just a set of springs and cam and see what I have. Cast iron GT40Ps as cast flow better than non-Ps due to revised plug location/angle. Free shipping. Joined . For 2018, the Coyote makes 460 hp. Test 1: 750-cfm carburetor, dual-plane intake manifold, and stock camshaft. The Fora platform includes forum software by XenForo. Once the headers are in place, then you can consider if you still want more power. Assuming the above configurationa pushrod 5.0L will potentially make between 250 and 260 hp. The cost of a new set of standard replacement roller lifters is very affordable at major retailers like Summit. For a better experience, please enable JavaScript in your browser before proceeding. bmcdaniel, Feb 17, 2004 #7. v8maverick Member. Even with a stock Mustang 5.0 cam makes good power. Aside from the cost of the nitrous itself, this setup should cost you little more than a stock rebuild using all brand new parts. 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. This will follow the guideline of a 1.6 rocker baseline and factory bottom end 79-95 related 5.0L Mustangs only. Anyways, I know the gt40ps will bump . 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. Both swaps made more sense when parts were readily available at the bone yard for cheap. 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 one added another 10 degrees of duration over the smaller Voodoo cam, along with 0.020 inch more intake valve lift. I'm wondering how these heads will interact with the paxton 1220 sl supercharger I'm trying to put on. Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. If you're going to use the stock 289 heads, install 1.84-inch intake valves, then port the intake and exhaust; these mods will net you about 185 cfm of intake port flow at 0.50 lift. 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. If you know him, ask him. *** 65 Mustang 351C 4v, AOD, 4.11 gears *** 66 Galaxie convert big block. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. Plus you will need to drill all the head bolt holes out as the 351W uses larger head bolts. This will cost additional money but is still worth it, in our opinion. At the time, I was still running smog equipment in a 1994 Mustang GT, so I had them drill the back of the heads for the thermactor connection. by travis Sun May 03, 2020 8:33 am. According to his data and verified dyno tests with an EFI 302, you can go above this level if you port the stock, lower intake manifold, or upgrade it altogether. I got a set of AFR heads , night and day. We also added a veteran Ford magnetic pickup distributor and used it to drive an MSD ignition system. Motor is going into a Ranger. (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. I don't need tons of power to enjoy the car. Weiand 7515 xcellerator intake. In 1987, he assumed the role of editor for Hot Rod magazine before returning to his first love of writing technical stories. We've already been motivated to put this engine in a buddy's Mustang. 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. I went to a couple in Tucson and almost all the Ford vehicles that came with a 5.0 had the heads missing. - I have a 1989 f150 with a 302 5 spd. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. GT40, GT40P, would be great factory heads. All Ford Mustangs | Model Specific Forums, GT-40P Heads - 5.0 Mustang & Super Fords Magazine. But the part about a cam replacement possibly being a labor intensive undertaking is correct. Manual trans. Ford Factory 5.0 Performance Cylinder Heads. I am very happy too. Good Luck. Depending on the Headers you have you might be okay. Dennis Hilliard of Central Coast says we can expect to gain three-tenths in the quarter-mile. What would be the best cam and springs to use for these heads in a 302 Windsor? Im now thinking of adding a cam to match the carb. Over $2050 for the 165/185 renegades. This is needed for the steel roller cam. Posted on May 07, 2014 by promarengine. No-option stripper- I like strippers. 302 .030 over with; Scat Forged Steel Rods, SpeedPro pistons and rings . Richard Holdener 240K subscribers Subscribe 63K views 1 year ago WESTECH PERFORMANCE GROUP LOW BUCK, GT40P 5.0L HEADS-CHEAP &. 1983 Mustang G.T. 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. How much HP and torque do you think I. Advanced: Daily Deals; Help & Contact; Sell; My eBay Expand My . These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. Obviously, tuneups will vary. Take the assembly to a machine shop to have it balanced and install it in the block. A forum community dedicated to Ford Mustang owners and enthusiasts. If the head bolt holes are 1/2" or slightly larger, ARP makes the washers and can be sourced from Ford Racing or ARP through a speed shop or Summit, Jegs and PAW among others. For a better experience, please enable JavaScript in your browser before proceeding. You gave me the info I was looking for, and I really do appreciate it. I was looking at putting on the GT40P heads on. (its not their engine) that is a healthy budget deal. The newer camshaft is designed for use with a soft bronze distributor gear, not the hardened steel gear used for older camshafts. T5z and 3.89 9" TL rear. I view the GT40P heads similar to Granada brakes. 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. 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. Yep my **** is coming apart again Isnt life great! It's an 86 roller 5.0 engine that had a recent rebuild sometime in the past with keith black pistons, otherwise stock. 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. I've not seen a set of longtubes that have an issue with GT40P's, either. . Because of this, your tuneup will probably need to be modified. Best of all, no machining is required to install these on your stock cast iron heads! This is what I recommend to everyone who is doing a budget 5.0 build. Over $2050 for the 165/185 renegades. 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. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 68stang351 Founding Member May 16, 2002 850 If this is beyond your technical ability, you could ask a local machine shop to perform the modifications. Test 3: Installed the larger Lunati camagain, no other changes. Ill do springs and a moderate cam and go for a good, dependable power plant. Pretty sure that was name, but I could be wrong. There are literally a dozen or so camshaft companies that offer a mild hydraulic roller cam for a 5.0L Ford. ported GT-40p, ported cobra intake, 65mm BBK, e-cam with 1.7s, longtubes, off-road x-pipe with flowmasters dumped. Shop by category. However realistically, with the amount of money spent modifying the gt40p heads or even those older 289 & 351w heads, you could have even better performing aluminum heads. 302, GT40P Heads, E cam, 4 into 4, Holley 600, Mallory Unilite, Levy SD T5, 3.73, 15" Team III, firewall mod, trunk mod, trailer hitch, drivers foot box mod, front tow rings. Calculating pushrod length After graduating from Iowa State University with a journalism degree in 1978, he combined his two passions: cars and writing. Every thing he tells you on this site is true. 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. I got lucky and found a complete Explorer GT40P engine online. The reply has so many assumptions that I cant even assume to know the answer. And remember ENGINES have been being built/rebuilt/modified for years. 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. United Engine and Machine sells cheap but decent pistons that will do what you're wanting. $169.50. We decided to test both ideas, so we ordered two roller cams from Lunati: a shorter-duration cam that would deliver decent idle vacuum and maybe make around 320 to 335 hp, and a longer-duration version that might push the horsepower up to perhaps 350 hp. We did the installation at Holten's place of employment, Motorworks, in Longwood, Florida. Definitely going to use my P heads. Never not once have I ever seen a SBF rod bolt create a failure. The longer duration created a slight loss of torque below 3,300 rpm compared to both previous cams, but beyond that mild loss of power, the bigger Voodo out-powered its smaller cousin, cranking out a peak torque of 355 lb-ft at 4,300 (a gain of 7 lb-ft over Test 2) and charging to a peak horsepower of 376 at 6,000 rpm. Not looking for crazy HP. Assuming this will be a daily driver engine, a short duration camshaft, especially when combined with a four-barrel dual plane intake manifold and headers, will deliver extremely snappy throttle response and the whole combination will increase the torque and peak horsepower by somewhere in the neighborhood of 20 to perhaps 35 horsepower. Holten runs the factory fan, but he had removed it when he ran the 12.63. A good port job can set you back another $500-$1,000. 1986 Short block with notched pistons. Again, assuming this is a nearly stock 5.0L with stock heads, the Weiand Street Warrior dual plane intake and 600 cfm carburetor, its important to not become overly aggressive and choose a big camshaft. 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. If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. Required fields are marked *. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. Also, the spark plug angle makes it a pain. 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. 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. 68 XR7 & 68 M-100. Aftermarket headers, such as those made by Hooker, BBK and Competition Engineering, are better and are just as easy, if somewhat more expensive, to procure used. FULL DYNO RESULTS. This combination should be good for about 400 horsepower and as much as 500 if you opt to use the stronger aftermarket pistons. Add a distributor designed for a carbureted 302 but make sure to install the correct distributor gear for your cam. That's a 40 per cent increase in power from a simple head and cam swap, and one seriously happy Mustang owner! You can find them on later model Mercury Mountaineers and several other Ford SUV applications. 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. 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.

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