Going from your heads to the GT40p heads will bump your compression by about a point.so hello bottom end torque. that is a healthy budget deal. Be careful, I was once bitten by one of those reptile engine builders. Free shipping for many products! Consider having the head's intake ports matched to the intake manifold gasket. If you're running a stock cam, 1.7 rockers will work perfectly. The gt40p head is considered the best OEM 302 head made. Many years ago, a friend bought a used 2001 Mercury Mountaineer 5.0L that was equipped with a set of really decent GT40P style iron heads. Ill do springs and a moderate cam and go for a good, dependable power plant. Best of all, no machining is required to install these on your stock cast iron heads! 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. I'd get the gt40 setup, and put an s trim on it. 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. Anyways, I know the gt40ps will bump . Add a distributor designed for a carbureted 302 but make sure to install the correct distributor gear for your cam. Ford Factory 5.0 Performance Cylinder Heads. 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. 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. But what we were most impressed with was the solid gain in torque over the smaller Voodoo cam from 3,500 and up. 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! 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. 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. Last Edit: January 18, 2015, 12:05:31 pm by businesstrader Logged shaunp. Cast iron GT40Ps as cast flow better than non-Ps due to revised plug location/angle. 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 guarantee plenty of burnout action when you add GT-40P heads to your 5.0 Mustang. The only way to really make more power is to go with a stroker kit, blower and/or heads. Headers and a camshaft will help but the engine really needs aftermarket 3/8 inch connecting rod bolts and aftermarket cylinder heads. PTP Engineering front suspension and 25540R17s all around. Stock heads with a fresh 3-angle valve job, shorty headers, T5, 4.10s, stock Explorer intake and stock '88 GT short block with 140,000 miles on it and an E cam in it. This test went so well that we were eager to see what the slightly bigger cam would do. 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. While the heads were off getting a massage, we turned our attention to the cam timing. 1983 Mustang G.T. As noted, this is looking like hes building a 351 Lightning truck motor, which is a good way to go. That's fantastic for the minimal investment we made. We also added a veteran Ford magnetic pickup distributor and used it to drive an MSD ignition system. Using the manufacturer recommended springs for your camshaft are a safe bet. Mar 23, 2004. Runs well. Good on ya Jeff Smith. It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. There are too many variables to add to this regarding aftermarket stroker kits or components. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. The hardest part of swapping the cam was just getting the timing cover off and back on again. 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. If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. I turned it because it was tired when I got it. how hard to put on? With. We set the timing to 34 degrees and rejetted the carburetor to get our desired 12.5:1 air/fuel ratio. Works on all factory cast iron E7, GT40, and GT40P cylinder heads! I'd much rather be able to drive it at 8 or 9/10s of what it can handle. Dennis Hilliard of Central Coast says we can expect to gain three-tenths in the quarter-mile. You gave me the info I was looking for, and I really do appreciate it. He'd be the best source. The GT40P heads flow a lot better than stock 351 heads. could the gear of off the oil pump drive(i know they're DIS), for the explorer motor be used on his dizzy? Very true about finding them at the local yards. Sure, you could race-port the existing E7 castings, which many have done, but then you're putting quite a bit of change into stock heads. JavaScript is disabled. I'm an old school guy (289 in 65 mustang), and I'm just looking into the new 5.0 engine (roller cam) stuff recently. 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. No-option stripper- I like strippers. You can have your current 28 oz rebalanced to 50. The spark plug issue is almost a non-issue. I'm also have the regular GT40 heads on my current build. I love my setup and it is very strong engine. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. Common sense would suggest that with the heavy lifting complete and the old cam removed, by not installing the new roller lifters along with the camshaft could be asking for the possibility of trouble just a few thousand miles down the road. Install a used set of 5.0L Mustang "shorty" headers, generally available at auto swap meets for a reasonable price. The car weighs #2835 with driver. Per a UEM tech support email I have the Icon IC736 is supposed to be good for GT40 heads when I asked about it. SB Ford GT40 Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Holley 670 street avenger carb. You can email the site owner to let them know you were blocked. You can have your current 28 oz rebalanced to 50. Performance & security by Cloudflare. Even with a stock Mustang 5.0 cam makes good power. This is an older thread, you may not receive a response, and could be reviving an old thread. When I purchased my "brand new" set of GT40P's, I bought them from an Mustang specific machine shop that used to exist called Central Coast Mustang. Early Windsors tend to have fairly restrictive exhaust manifolds, making the addition of a set of headers that much more efficient. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Both swaps made more sense when parts were readily available at the bone yard for cheap. Scorpion 1.6 roller rockers. Yeah, out of a bolt on upgrade, you'd probably be looking at 260-280rwhp ish with supporting mods. Definitely going to use my P heads. SB Ford GT40P Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. 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. I have managed to get 402 horse power from a 289 hipo natural aspirated. 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. Motor is going into a Ranger. Note the head bolt hole issue, some GT40 iron heads had 1/2 holes, if not they will need to be enlarged. Assorted screwdrivers, pliers and vise-grips. 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. Similar to regular GT-40 heads, the biggest difference between the two is that the P-heads feature a revised spark plug angle which extends the plug into the combustion chamber, putting the flame front close to the absolute center of the chamber, resulting in a smoother combustion process. 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. They are more expensive than standard head gaskets, but they also do the job and are worth the additional money. 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. Free shipping. That's an improvement of 22 hp over Test 2. As with Chevrolet's small-block engine, the aftermarket has had dozens of years to expand the range and reduce the cost of the parts they offer for this engine. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. Buy the lifters for peace of mind now and hopefully for the duration. It's a classic move we've pulled off many times. The tube headers showed a gain of almost 100 hp! I plan on running a AFM b31 cam too which has relatively small duration for the intake valve. Over $2050 for the 165/185 renegades. Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. Stock valve sizes? Yes- thank you. This one added another 10 degrees of duration over the smaller Voodoo cam, along with 0.020 inch more intake valve lift. I've not seen a set of longtubes that have an issue with GT40P's, either. I spin it to 6500 and thats about it. Location: Re: Stock Ford 351W 4bbl dyno numbers. check out the. 302 .030 over with; Scat Forged Steel Rods, SpeedPro pistons and rings . For real performance, stock E7TE heads leave a lot to be desired. many thanks to all you eco-hippies giving me dirty looks and helping me feel llike an overall badass rebel. Save narve00 Install a set of 1.7:1 roller-tipped rocker arms on the heads. I got lucky and found a complete Explorer GT40P engine online. And agree the cams do help and a few tricks with the heads that I have discovered really make a difference. Because of this, your tuneup will probably need to be modified. SBF engines are modified constantly. Tim's junkyard refugee survived the beating and we had a bitchin' story. A forum community dedicated to vintage Ford Mustang owners and enthusiasts. And remember ENGINES have been being built/rebuilt/modified for years. just curious. You'll also have to use your 289 timing chain cover since it has a hole for the oil dip stick and fuel pump. SB Ford, GT40 .575" Lift Max Output II Drop in Valve Spring Kit, Hyd Roller, 140 Lb Seat. For the most part 302 heads and 351W heads are the same. Long tube headers are a terrific idea, but you need to open up the exhaust side. We also added an Edelbrock Performer RPM dual-plane intake and a set of 158-inch headers with no mufflers. 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. I may do some port matching and a little cleanup, otherwise just a set of springs and cam and see what I have. - I have a 1989 f150 with a 302 5 spd. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. We've already been motivated to put this engine in a buddy's Mustang. Do you guys have part numbers for the spring kits? For a better experience, please enable JavaScript in your browser before proceeding. 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. Small Block Ford 289/302/5.0L/351w 180cc/60cc Aluminum Cylinder Head E42004. This will keep you from dropping your overall static compression ratio and losing power. With the GT-40P heads you will need to back off the timing a couple degrees and bump up the fuel pressure. It took him and yours truly eight hours from start to finish, using air tools and a lift to gain access to the header flanges. Car Craft mag. The entire front accessory drive and timing chain cover must be removed, along with the distributor and intake manifold. The '00 Ford Explorers and Mercury Moutaineers were factory equipped with one of Ford's better 5.0L motors. Along with the heads, we used MAC headers for GT-40P heads. These engines came with the GT40P head, which even with its small valves, offers really good performance. The "P" heads flow better. Install a set of 1.7:1 roller-tipped rocker arms on the heads. They also have emissions legal heads as well. First, adding headers will improve power on the existing combination. 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. Stock 1989 5.0L HO pistons will work if you can find them. 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). Pretty sure that was name, but I could be wrong. Sponsored. Calculated compression to 9.8:1. '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 I have been working on Fords for 40 years and I have experimented with a few tricks of my own. Weiand 7515 xcellerator intake. In less than an hour, we were ready to test. 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. 1979 Indy 500 Pace Car. We will go into more detail on the head mods in a later story in Junkyard Builder, so watch for it. Click to reveal I just read about this build on the corral.net. Obviously, tuneups will vary. Richard Holdener 240K subscribers Subscribe 63K views 1 year ago WESTECH PERFORMANCE GROUP LOW BUCK, GT40P 5.0L HEADS-CHEAP &. 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. I have a very good running stock 1981 302 in a F100 short box. The Fora platform includes forum software by XenForo. I had a set of 69 302 heads I ran for a while . 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? The multiple-layer steel construction allows the gasket to conform to movement between the cylinder head and block while maintaining a good seal. For additional insurance, we also added a set of ARP head studs, which are stronger and offer better thread overlap than factory bolts, which helps prevent pulling threads out of a used block. A trip to Orlando Speed World provided us with updated quarter-mile times. 1986 Short block with notched pistons. When building an engine there is a lot to take into consideration. If you dont feel comfortable doing this higher a pro. In mid-1997, the Explorer and Mountaineer 5.0 L heads were revised and renamed . Took me 7 hours to do one head.but they cleaned up real nice. Because its all been done time after time after. Without changing the stock pistons. Take the assembly to a machine shop to have it balanced and install it in the block. What did the heads flow? This is what I recommend to everyone who is doing a budget 5.0 build. 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. Stock 93-95 Cobra shortblock (stock cobra cam), GT40X heads, 1.7 rockers, Edelbrock Performer RPM intake, Holley 650, and longtube headers. A forum community dedicated to Ford Mustang owners and enthusiasts. Start with any 302 block, but try to find one from 1985 and up since it will already have provisions for a roller camshaft. Free shipping. Torque on the other hand isnt something to write home about. 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. Choose a cylinder head before you install the pistons. A COMP hydraulic roller cam we found works well with this combination. I am very happy too. 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. I'm sure the dyno operator used some goofball correction factor to make the numbers look higher. never messed with the timing, its at 35* total . Shop by category. Some ideas never go out of style. A good port job can set you back another $500-$1,000. Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more! 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. I don't need tons of power to enjoy the car. 950.00 us a set and will ship . We know what you're thinking--only two-tenths from an extra 45 hp? #2::: Get advice from a reptile engine builder with experience(first flag for me is when somebody refers to an ENGINE as a MOTOR! 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. +1 I would go with the regular GT40 heads. OR you could put your automotive journalistic skills in motion by reporting on the many new modern components available for the latest generation 351 Cleveland. For the first test, we were reusing the stock Explorer cam, so the engine didn't need any break-in time. Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! Well also assume that this engine is running stock exhaust manifolds. This modification will help your late-model GT40P heads work better with the old-school carbureted intake setup. GT40, GT40P, would be great factory heads. Not sure how they would mate up to your existing exhuast, but otherwise they should work. 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. Slover primarily focused on the exhaust side of the GT40P heads. An aggressive cam will wake it up a bit. Now he serves as a regular contributor to OnAllCylinders. Calculating pushrod length I got lucky and found a complete Explorer GT40P engine online. This will follow the guideline of a 1.6 rocker baseline and factory bottom end 79-95 related 5.0L Mustangs only. Like I said lots of options. Im new and Im currently building a 302 on a budget and want to raise compression without milling heads but by pistons and I want to get close to 10:1. fordfan289, Aug 27, 2011 For the cherry on top of this Blue Oval desert, we bolted Mike Thermos' simple Powerstar plate nitrous system under the carburetor, installed the 140-hp jets (55 fuel and 55 nitrous), and used the trigger to retard the timing on the MSD ignition by 8 degrees. Vehicle: 1972 2 door 302 maverick, 1986 5.0 stang gt convertible,66 mustang coupe, HEMI ram. For 2018, the Coyote makes 460 hp. Here is my setup. Can anyone give me a little feedback about a '99 Explorer 5.0, and tell me if it's my answer. thats after 3 hours of idling/midrange hits to tune the idle and part throttle . 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! We probably could have coaxed an even 300 hp out of this stock configuration, but with such good numbers, we decided to jump right into the first Lunati cam. Once you get into the FoMoCo aftermarket aluminum GT40s though, all bets are off. We need a build on a 400+ hp 302/6 build. 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. But dont think that adding a bigger camshaft will make more power. Im a different animal. This is needed for the steel roller cam.
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