Learn how your comment data is processed. Well assume it is a 5.0L with stock heads. Depends on the budget. Holten runs the factory fan, but he had removed it when he ran the 12.63. Also, you'll need to get a steel distributor gear to replace the iron gear that is currently on your distributor. Early Windsors tend to have fairly restrictive exhaust manifolds, making the addition of a set of headers that much more efficient. They almost seem like flywheel numbers rather than RWHP numbers. Compare. Because of this, your tuneup will probably need to be modified. 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. Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! For this reason, we're not sure what kind of boost the GT-40P heads will give. Torque on the other hand isnt something to write home about. You can find them on later model Mercury Mountaineers and several other Ford SUV applications. Assorted screwdrivers, pliers and vise-grips. Pretty sure that was name, but I could be wrong. Holley 670 street avenger carb. Let us explain. JavaScript is disabled. And agree the cams do help and a few tricks with the heads that I have discovered really make a difference. The only way to really make more power is to go with a stroker kit, blower and/or heads. The GT40 heads are a bit more versatile, working with the 5.4 and 6.8, while the GT40P (Explorer/Mountaineer) heads will only work on the 6.8 due to an interference issue. All this is worth it. I have managed to get 402 horse power from a 289 hipo natural aspirated. this head is complete with new 1.837 int valves and 1.536 exhaust valves. With gt40p heads and 289 hipo exhaust manifolds changing sparkplugs is the same as the original 302 heads and manifolds, I use the spark plugs that are recomended for the explorer with gt40p heads and you can use straight or angled boots. This time around, we chose a shining example of this junkyard art form. And remember ENGINES have been being built/rebuilt/modified for years. Tim's junkyard refugee survived the beating and we had a bitchin' story. 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. Those heads were unported and had stock valve sizes! Thank You. THANKS VERY MUCH! are you twisted331 also? I got lucky and found a complete Explorer GT40P engine online. . If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. There are caveats to this plan, however. Richard Rowe has been writing professionally since 2007, specializing in automotive topics. http://vb.foureyedpride.com/showthread.php?t=89153, http://www.facebook.com/groups/233213650060739/, 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 fuel injection system . That's a good combo in my book. This engine will be good for your 65 Mustang. Per a UEM tech support email I have the Icon IC736 is supposed to be good for GT40 heads when I asked about it. HAD '82 GT monochromatic (red).black cloth HAVE Headers and a camshaft will help but the engine really needs aftermarket 3/8 inch connecting rod bolts and aftermarket cylinder heads. could the gear of off the oil pump drive(i know they're DIS), for the explorer motor be used on his dizzy? They are more expensive than standard head gaskets, but they also do the job and are worth the additional money. Not when you can buy a set of Promaxx or AFR Enforcer heads for $1000, that already have decent hardware included. 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? 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. If I get different urges later, Ill pursue those then. This is the main reason why these engines are not modified as much as the small block Chevy. If you go with a diffrent cam, make sure you change springs, The Trick Flow kit comes with everything for around $130. Thanks. Took me 7 hours to do one head.but they cleaned up real nice. Gasoline/Diesel all makes on earth & still doing it today with great pride.Feel free to contact me anytime. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. We've already been motivated to put this engine in a buddy's Mustang. Limited header choice is certainly a challenge. 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. The GT40P heads flow a lot better than stock 351 heads. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. What would be the best cam and springs to use for these heads in a 302 Windsor? Once the headers are in place, then you can consider if you still want more power. But dont think that adding a bigger camshaft will make more power. Over $2050 for the 165/185 renegades. I had a set of 69 302 heads I ran for a while . The heads got a 3 angle valve job, new valves from speed-pro and all the valve train was from crane that matched the current hydraulic cam. This is an older thread, you may not receive a response, and could be reviving an old thread. There was an article in Hot Rod magazine in the mid '80's where Jon Kaase was developing 351w packages. In a lightweight Fox or early Mustang with a five-speed behind it, this would be a great little street engine. If I remember right, non of the GT40P's (later models) had the thermactor smog provisions. I'd much rather be able to drive it at 8 or 9/10s of what it can handle. Stock 1989 5.0L HO pistons will work if you can find them. . First, adding headers will improve power on the existing combination. I love my setup and it is very strong engine. 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. Long tube headers are a terrific idea, but you need to open up the exhaust side. For a better experience, please enable JavaScript in your browser before proceeding. Central Coast Mustang sells GT-40P heads at a great price, making them a viable alternative in a market flooded with performance head choices. These timeslips are from 1280' above sea level. 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. A good port job can set you back another $500-$1,000. The reply has so many assumptions that I cant even assume to know the answer. However I think the opportunity window is slowly closing. Note the head bolt hole issue, some GT40 iron heads had 1/2 holes, if not they will need to be enlarged. 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. JavaScript is disabled. 97% Positive Feedback . Assemble the rotating assembly with a stock 5.0L crankshaft, a set of 5.0L rods and the specified pistons with stock-type rings. T5z and 3.89 9" TL rear. 1983 Mustang G.T. HiPo manifolds and Ill be good. 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. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. They also have emissions legal heads as well. This is what I recommend to everyone who is doing a budget 5.0 build. It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. The kit offers adjustable power from 50 to 250 hp with a simple jet change. Manual trans. I need that part number too! We were cruising the 'yard a while back and located a 2000 Ford Explorer with an EFI 5.0L V-8 engine. The Edelbrock Performer RPM is a good choice, but Holley, Weiand and Ford Motorsport also have similar offerings. .. i would not buy valves unless you need them amd would not switch to studs with these heads for your low hp . These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. Its NA but makes use of AFR heads and some other aftermarket goodies. (its not their engine) A forum community dedicated to Ford performance owners and enthusiasts. 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. 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. The GT40P heads flow a lot better than stock 351 heads. Overview. That's an improvement of 22 hp over Test 2. Last Edit: January 18, 2015, 12:05:31 pm by businesstrader Logged shaunp. 69.90.139.244 Maybe I'll think about a cam swap? Instructions on porting the GT-40p heads here. For a better experience, please enable JavaScript in your browser before proceeding. The rest went very smoothly, and we reused the stock lifters and suffered no ulcers worrying about breaking in the cam. 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. 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. 950.00 us a set and will ship . Calculated compression to 9.8:1. Test 3: Installed the larger Lunati camagain, no other changes. At the dragstrip, we gained two-tenths and 2 mph. 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. built one using a 91' HO short block with a set of AFR 165 heads, Weiand . 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. 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. If you know him, ask him. 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. 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. Cloudflare Ray ID: 7a2e2d95dedea1e4 When you purchase through links on our site, we may earn an affiliate commission, which supports our community. thats after 3 hours of idling/midrange hits to tune the idle and part throttle . I'd get the gt40 setup, and put an s trim on it. 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. They suffered from poor aftermarket support up until about 15 years ago when it really came on strong. check out the. I was looking at putting on the GT40P heads on. Since the engine is nearly stock, we would want to choose a relatively mild camshaft with somewhat more lift and duration than stock, but again not going too aggressive. Now we know why Dennis Hilliard of Central Coast Mustang is so high on these heads. Keywords If you dont feel comfortable doing this higher a pro. 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. 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. The asterisk HP differences are calculated using Test 1's 294-hp peak. 02-11-2012, 07:16 PM #6 fiveoh 86lx I'm new and I'm 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. In review, we rescued a used 5.0L Ford from the boneyard, ported the heads, added a cam, carburetor, intake manifold, and headers, and pulled an amazing 376 hp out of the mix. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. Pride is built, in your garage, with your two hands. i've got a short block started, and i recently came across a set of GT40P heads for FREE ( love family members). I've not seen a set of longtubes that have an issue with GT40P's, either. GT40Ps have 58cc. I added a link to it. The valve seats have been cut on a . 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. Both have very similar valve sizes, but the GT40P head has slightly larger combustion chambers for a small bump in compression and better flow. The GTp heads are like GT 40's with smaller combustion chambers and the spark plugs are relocated for a more efficient burn.
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