302 with gt40p heads horsepower

Ford Factory 5.0 Performance Cylinder Heads. Come join the discussion about popular models such as the Mustang, Galaxie, Falcon, Fairlane, Torino, Shelby and many more! This is what I recommend to everyone who is doing a budget 5.0 build. Torque on the other hand isnt something to write home about. I went to a couple in Tucson and almost all the Ford vehicles that came with a 5.0 had the heads missing. 97% Positive Feedback . I am working on a set of iron GT40s hoping it goes faster. If we subtract the 20 hp that the fan is worth, we end up with a gain of 25 hp. Test 2: Changed to the smaller of the two Lunati camshaftsno other changes. I have a 432 HP non Hi Po 289 I built. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. The question was whether we wanted a torquey small-block or a more cammed-up rpm engine to boost peak horsepower. 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. timing and compression ratio with gt40p heads - Modded Mustang Forums A forum community dedicated to vintage Ford Mustang owners and enthusiasts. Good Luck. I am sure you have increased the bore size and possibly even the stroke a bit and spin it up pretty high in the RPM range. 302 heads on 351w | ClassicBroncos.com Forum I got a GT40P off the assembly line years ago. Is asking advice for a fairly common situation involving parts with mandatory compatibility between the two for performance and longevity. 68 Mustang GT/CS Highland Green, PS, PB & Console, C Code w/C4 & 3.55 8 rear, If you aren't using the GT40P's stock, with maybe a spring upgrade and valve job, they aren't worth it anymore. We were cruising the 'yard a while back and located a 2000 Ford Explorer with an EFI 5.0L V-8 engine. Just put some 1.7 pedistal rocker arm on along with a mild camshaft (make sure to use the correct valve springs), you will make over 300 flywheel hp. could the gear of off the oil pump drive(i know they're DIS), for the explorer motor be used on his dizzy? Hey Motorheadty,Like your comments,question for ya,I have a 92 convertible,just bought a 5.0 out of a 94 gt that was just freshened up top end,gt40p heads w/new springs etc for the new E303 cam,new FRP roller lifters,Crane 1.7 rockers,hardened push rods,double roller timing set,all put on a bottom end w/104000 miles,needless to say previous owner pulled said engine after 800 miles and now building a 351,I pulled engine down my machinest,putting forged internals in and bolting everything back together,I want to run about a 150 shot N2o,and iam going carb,wondering which intake would be best w/the 150 shot,heard that dual planes might not be the way to go? When combined with modern power-makers, such as nitrous, the 302 is more than capable of producing 400+ horsepower for little more than the cost of a stock engine rebuild. The HP DIFF column on the far right lists the horsepower difference between Test 1 and Test 3. ***Most important is theStupid question is the one that was never asked!*** That carbureted GT40P motor made 465 on th engine dyno with a .500" 239/244 camshaft, Holley 650 carb and Weiand Stealth intake. 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. We guarantee plenty of burnout action when you add GT-40P heads to your 5.0 Mustang. 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. The fix: basic power upgrades for a sluggish 302 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. Budget 300HP 302 Build JEGS High Performance. the engine is carburated of that makes a difference. i have a 302 engine from a 1977 granada and i am wondering if gt40p heads from an explorer will fit on this motor. (Image/Harrison Creamery). The engine never huffed oil out of the breathers, and the spark plugs all looked excellent. Holten tells us removing the fan is worth two-tenths in itself, which tells us the fan soaks up roughly 20 hp. 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. Can I run the new cam with the same roller hydraulic lifters or do I have to change the lifters too? 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. Choose a cylinder head before you install the pistons. 402 HP NA from a HI PO 289 isnt that mysterious of a feat to accomplish with todays SBF Aftermarket parts availability. Despite adding 30 degrees of intake duration, this cam improved torque throughout the entire test from 3,000 rpm on up. You'll also have to use your 289 timing chain cover since it has a hole for the oil dip stick and fuel pump. how hard to put on? Stock Ford 351W 4bbl dyno numbers - Don Terrill's Speed-Talk I must agree with Jeff Smith. Do you guys have part numbers for the spring kits? 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 Slover primarily focused on the exhaust side of the GT40P heads. 302 GT40 Dyno Results - FourEyedPride.com 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. Instructions on porting the GT-40p heads here. Assorted screwdrivers, pliers and vise-grips. We know what you're thinking--only two-tenths from an extra 45 hp? HAD '82 GT monochromatic (red).black cloth HAVE The Edelbrock Performer RPM is a good choice, but Holley, Weiand and Ford Motorsport also have similar offerings. There are caveats to this plan, however. 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. The car weighs #2835 with driver. I have managed to get 402 horse power from a 289 hipo natural aspirated. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. 69-70 302 heads (the ones with the heart-shaped combustion chamber) Any early 289 heads for the chamber size (but you'll have small ports & valves w/all that CR) Flat Ernie, Aug 27, 2011 SHARE POST #8 fordfan289 Member from indiana correct me if Im wrong but cant you use 351c heads and get the same thing as a 302 boss. 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 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. We turned to Rare Auto Design in Orlando for dyno tests to find out how much horsepower we gained. For the most part 302 heads and 351W heads are the same. #1:::Throw out all your Magazines that suggest what to do! I don't need tons of power to enjoy the car. Gt40/gt40p Heads On A 351w Questions - StangNet 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. GT40P heads, 302 and Victor Jr. intake: - Factory Five Racing Forum 351W with GT40P heads? | Mercury Cougar Owners Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. 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. The cost of a new set of standard replacement roller lifters is very affordable at major retailers like Summit. The GT40 & GT40P heads had a few differences that are note-worthy, the most importantly being the bump in compression. Vehicle: 1972 2 door 302 maverick, 1986 5.0 stang gt convertible,66 mustang coupe, HEMI ram. 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. The hardest part of swapping the cam was just getting the timing cover off and back on again. We compare the GT40s to modern cylinder heads as well as other heads from the era. This is an older thread, you may not receive a response, and could be reviving an old thread. The kit offers adjustable power from 50 to 250 hp with a simple jet change. 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. well i finally did my first ever carb build, ive always been an EFI guy Black 1985 GT: 408w, in the 6's in the 1/8 mile. But what we were most impressed with was the solid gain in torque over the smaller Voodoo cam from 3,500 and up. Dyno results GT40P heads | Vintage Mustang Forums No-option stripper- I like strippers. Building 400hp Into A 5.0L Small-Block Engine - MotorTrend Overview. We've already been motivated to put this engine in a buddy's Mustang. how much HP and torque? What would be the best cam and springs to use for these heads in a 302 Windsor? Holten runs the factory fan, but he had removed it when he ran the 12.63. All this is worth it. Your email address will not be published. Understanding Ford's Fox Body GT40 Cylinder Heads - CJ Pony Parts 1996-2001 Ford Explorer 5.0L V8 Specifications If you can find individual flanged headers like the obsolete MAC headers had, those worked really well with GT40P's. Buy the lifters for peace of mind now and hopefully for the duration. The rest went very smoothly, and we reused the stock lifters and suffered no ulcers worrying about breaking in the cam. GT40P heads? how hard to put on? how much HP and torque? Here a comparison of different heads on a 302: I'm very happy with my GT40P. 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. At the dragstrip, we gained two-tenths and 2 mph. That said there are some better aftermarket options for heads also. 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. You gave me the info I was looking for, and I really do appreciate it. 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. 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). E303 Cam advanced 4 degrees. He'd be the best source. AFR 165cc 58cc Heads. Gasoline/Diesel all makes on earth & still doing it today with great pride.Feel free to contact me anytime. Very true about finding them at the local yards. Best of all, no machining is required to install these on your stock cast iron heads! A bone stock 2bbl early 351w with stock replacement forged pistons (9.0 compression) and dyno headers made 211 Hp . I plan on running a AFM b31 cam too which has relatively small duration for the intake valve. 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. While the heads were off getting a massage, we turned our attention to the cam timing. This pushed that little Ford to a peak horsepower of 503, and that was where we stopped. SBF engines are modified constantly. Small Block Ford 289/302/5.0L/351w 180cc/60cc Aluminum Cylinder Head E42004. As with all head installations, check piston-to-valve clearance before final startup. In 1987, he assumed the role of editor for Hot Rod magazine before returning to his first love of writing technical stories. For a better experience, please enable JavaScript in your browser before proceeding. 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. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Richard Rowe has been writing professionally since 2007, specializing in automotive topics. 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. 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. will gt40p heads fit on a 302 | Ford Mustang Forum The 2 heads are about the same when looking at the numbers with the GT40p heads having a slight edge. Compare. Location: Re: Stock Ford 351W 4bbl dyno numbers. Perhaps even more surprising was how well this engine idled, calmly purring with 16 inches of manifold vacuum at 980 rpm. I can tell you that with my 9.503 block, 22cc dished pistons and 64cc heads, I'm at 9.5:1 compression. However, stepping up in the performance head market will set you back more than $1,200 for a decent pair of aluminum castings--and that's straight out of the box, with no porting. Calculated compression to 9.8:1. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. This needs to be removed and different exhaust valves, retainers, and valve springs added to turn this into a decent street head. 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. With the engine reassembled, we boxed up our second camshaft and headed for Westech's dyno. Definitely going to use my P heads. You should be able to get away with a 150 to 200 horsepower shot later, but it's best to start out small and work up. Richard Holdener 240K subscribers Subscribe 63K views 1 year ago WESTECH PERFORMANCE GROUP LOW BUCK, GT40P 5.0L HEADS-CHEAP &. Someone does make the Tri-Y's headers for the early Mustangs using the "P" heads. Those are really good numbers. Good on ya Jeff Smith. 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. There are literally a dozen or so camshaft companies that offer a mild hydraulic roller cam for a 5.0L Ford. Manual trans. I guess I had it backwards, sorry about that, didn't mean to spread misinformation. 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. Add 40 to 70 HP to your 302 yourself - Factory Five Racing Forum Junkyard Gt40p Heads-add 30+ Hp to Your 5.0l (For Free?) 302 .030 over with; Scat Forged Steel Rods, SpeedPro pistons and rings . As noted, this is looking like hes building a 351 Lightning truck motor, which is a good way to go. Keep in mind that swapping camshafts is a fairly extensive effort. 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. I'm using the Trick Flow stage 1 cam with 1.7 roller rockers. I recall having an absolute blast with my old K-code coupe back in the day. There is a better way. The entire front accessory drive and timing chain cover must be removed, along with the distributor and intake manifold. built one using a 91' HO short block with a set of AFR 165 heads, Weiand . I view the GT40P heads similar to Granada brakes. 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. GT-40 heads HP increase | Mustang Forums at StangNet 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 The reason for this is that we're actually replacing mildly worked E7TE heads. 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. . 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. So . 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. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. FORD, SMALL BLOCK 302 HO w/ E7, GT40P & GT40 - Alex's Parts With. 302HO with gt40p heads | Mustang Forums at StangNet If you go with a diffrent cam, make sure you change springs, The Trick Flow kit comes with everything for around $130. An aggressive cam will wake it up a bit. With no other changes we gained 25 hp using factory iron heads. 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. Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10.