302 with gt40p heads horsepowerautomobiles in the progressive era

We were cruising the 'yard a while back and located a 2000 Ford Explorer with an EFI 5.0L V-8 engine. gt40p heads on a 289 in a 66 | Vintage Mustang Forums Most of them are aware of what changes need to be completed. For 2018, the Coyote makes 460 hp. We turned to Rare Auto Design in Orlando for dyno tests to find out how much horsepower we gained. 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. Yeah, except those. a) ain't early and b) aren't 289 heads. just curious. 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. people can stop saying that adding aftermarket cam with stock heads is a waste of time. 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. Slover primarily focused on the exhaust side of the GT40P heads. You can email the site owner to let them know you were blocked. You didnt provide a lot of information about the engine itself, Im assuming its 85 or newer ( roller cam) May need a freshen up of the bottom end if compression is the issue. Here is my setup. I may do some port matching and a little cleanup, otherwise just a set of springs and cam and see what I have. For a better experience, please enable JavaScript in your browser before proceeding. What did the heads flow? (its not their engine) Win or lose, if you buy the ticket you must take the ride. 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. Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - GT40P heads? GT40P heads? how hard to put on? how much HP and torque? I got a set of AFR heads , night and day. Now we know why Dennis Hilliard of Central Coast Mustang is so high on these heads. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 302 heads on 351w | ClassicBroncos.com Forum 97% Positive Feedback . The car weighs #2835 with driver. Start with any 302 block, but try to find one from 1985 and up since it will already have provisions for a roller camshaft. GT40P heads, what kind of performance do they give? - FourEyedPride.com . I have managed to get 402 horse power from a 289 hipo natural aspirated. The newer camshaft is designed for use with a soft bronze distributor gear, not the hardened steel gear used for older camshafts. But the part about a cam replacement possibly being a labor intensive undertaking is correct. 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. If you're running a stock cam, 1.7 rockers will work perfectly. never messed with the timing, its at 35* total . A COMP hydraulic roller cam we found works well with this combination. I'll save the effort and lighten my front end by 50# with aluminum. However, when we dyno'd the car before installing the GT-40P heads, the fan was on the car. The reason for this is that we're actually replacing mildly worked E7TE heads. LOW-BUCK 302 FORD HEAD UPGRADE - YouTube Install a set of 1.7:1 roller-tipped rocker arms on the heads. The reply has so many assumptions that I cant even assume to know the answer. Add 40 to 70 HP to your 302 yourself - Factory Five Racing Forum Upgrading Fox Body Cylinder Heads - AmericanMuscle.com $700.98. 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. Required fields are marked *. That's a good combo in my book. Tim's junkyard refugee survived the beating and we had a bitchin' story. How to Get More Horsepower Out of a Ford 289 | It Still Runs Install a set of 1.7:1 roller-tipped rocker arms on the heads. 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. The Fora platform includes forum software by XenForo. Max hp out of gt 40 heads | Mustang Evolution Forum . Yea. Mac and Ford Motorsport both make a GT40P spacific header. The only way to really make more power is to go with a stroker kit, blower and/or heads. If you have a early 351W ie pre 76 it probably . This is just a quick overview of the changes that need to be done. 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. Once the headers are in place, then you can consider if you still want more power. REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS | What's New This test went so well that we were eager to see what the slightly bigger cam would do. SBF engines are modified constantly. What Are The GT40 & GT40P Heads? - LMR.com That's more than enough to feed a power-brake booster. Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. Headers and a camshaft will help but the engine really needs aftermarket 3/8 inch connecting rod bolts and aftermarket cylinder heads. The question was whether we wanted a torquey small-block or a more cammed-up rpm engine to boost peak horsepower. Their weak point is that the rotator used on the exhaust valve is very thick. Holten's best time is a 12.63 at 105.9 mph, and if we gain the desired result he will be right in the thick of things in Trophy Stock competition. I've got gt40p heads for it I'll be running, and can't afford better . They suffered from poor aftermarket support up until about 15 years ago when it really came on strong. But don't think that adding a bigger camshaft will make more power. Someone does make the Tri-Y's headers for the early Mustangs using the "P" heads. Ive been building ENGINES for 40+ years. Eldelbrocks Air Gap intake manifold should work well with the combination. If you go with a diffrent cam, make sure you change springs, The Trick Flow kit comes with everything for around $130. Understanding Ford's Fox Body GT40 Cylinder Heads - CJ Pony Parts We've already been motivated to put this engine in a buddy's Mustang. Not when you can buy a set of Promaxx or AFR Enforcer heads for $1000, that already have decent hardware included. Like I said lots of options. hole size 302 is 7/16 and 351 is 1/2 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. Anyways, I know the gt40ps will bump . I wouldnt recommend reusing lifters though. Ive bought wrecking yard SBFs and put 20 lbs of boost to them and spin them to 7000 and made 500 HP with several of them. Calculated compression to 9.8:1. Yeah, out of a bolt on upgrade, you'd probably be looking at 260-280rwhp ish with supporting mods. 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. You'll have to plug the oil hole that is in the engine from the old oil dipstick. Ill do springs and a moderate cam and go for a good, dependable power plant. In mid-1997, the Explorer and Mountaineer 5.0 L heads were revised and renamed . . An aggressive cam will wake it up a bit. Holten tells us removing the fan is worth two-tenths in itself, which tells us the fan soaks up roughly 20 hp. A trip to Orlando Speed World provided us with updated quarter-mile times. You might even say its like flogging a dead horse without any animals actually being injured during my moments of sarcasm. Pride is built, in your garage, with your two hands. thats after 3 hours of idling/midrange hits to tune the idle and part throttle . Assemble the rotating assembly with a stock 5.0L crankshaft, a set of 5.0L rods and the specified pistons with stock-type rings. He has worked as a tractor-trailer driver and mechanic, a rigger at a fire engine factory and as a race-car driver and builder. THANKS VERY MUCH! 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? If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. GT40, GT40P, would be great factory heads. (Image/Harrison Creamery). That's an improvement of 22 hp over Test 2. *** 65 Mustang 351C 4v, AOD, 4.11 gears *** 66 Galaxie convert big block. I had a set of 69 302 heads I ran for a while . Save narve00 Its NA but makes use of AFR heads and some other aftermarket goodies. 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. I'll prob take a trip up there this weekend after scavenging the junkyards, thanks a million. 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. GT40p heads peak horsepower was [email protected] with 363ft/[email protected] The worked 351 heads showed peak . A solid 300-325 hp should be plenty and that's with good drivability and reliability as well. 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. He'd be the best source. You'll also have to use your 289 timing chain cover since it has a hole for the oil dip stick and fuel pump. As noted, this is looking like hes building a 351 Lightning truck motor, which is a good way to go. Is asking advice for a fairly common situation involving parts with mandatory compatibility between the two for performance and longevity. (Please note these are not GT40P Explorer heads). I've not seen a set of longtubes that have an issue with GT40P's, either. 950.00 us a set and will ship . There are caveats to this plan, however. JavaScript is disabled. This one added another 10 degrees of duration over the smaller Voodoo cam, along with 0.020 inch more intake valve lift. gt40p headers | Maverick/Comet Forums Weiand 7515 xcellerator intake. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. If you dont feel comfortable doing this higher a pro. A bone stock 2bbl early 351w with stock replacement forged pistons (9.0 compression) and dyno headers made 211 Hp . Without changing the stock pistons. 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. JavaScript is disabled. Commonly referred to as Explorer heads, GT-40P iron castings are found on current 5.0-equipped Explorers. The tube headers showed a gain of almost 100 hp! Free shipping for many products! Also, you'll need to get a steel distributor gear to replace the iron gear that is currently on your distributor. will gt40p heads fit on a 302 | Ford Mustang Forum The kit offers adjustable power from 50 to 250 hp with a simple jet change. These are among the best of the iron Ford Windsor heads as they tend to flow much better than earlier castings. All this is worth it. 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. how hard to put on? At the dragstrip, we gained two-tenths and 2 mph. GT40 Heads On A 289? | Ford Muscle Cars Tech Forum Because of this, your tuneup will probably need to be modified. You can have your current 28 oz rebalanced to 50. There are a couple of reasons for this suggestion. how much HP and torque? 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. Dyno results GT40P heads | Vintage Mustang Forums 331/347 stroker w/gt40p's, waste?Hp?cost involved? - Maverick Scorpion 1.6 roller rockers. Per a UEM tech support email I have the Icon IC736 is supposed to be good for GT40 heads when I asked about it. And agree the cams do help and a few tricks with the heads that I have discovered really make a difference. Boy, were we surprised with the results. While the heads were off getting a massage, we turned our attention to the cam timing. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Cant wait to try um out. You need to check. 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. 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. 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.

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