The spark plug issue is almost a non-issue. +1 I would go with the regular GT40 heads. 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. 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? The engine was only rated at 215 hp, but it at least had 9.0:1 compression. The headers will improve this airflow throughout the entire rpm rangeadding more torque and horsepower. On slicks the car went some low 7.70s right at 90mph. hole size 302 is 7/16 and 351 is 1/2 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. 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. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. 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. He'd be the best source. We guarantee plenty of burnout action when you add GT-40P heads to your 5.0 Mustang. A forum community dedicated to Ford performance owners and enthusiasts. Consider having the head's intake ports matched to the intake manifold gasket. What would be the best cam and springs to use for these heads in a 302 Windsor? While the heads were off getting a massage, we turned our attention to the cam timing. 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. fuel injection system . 68stang351 Founding Member May 16, 2002 850 No-option stripper- I like strippers. The Edelbrock Performer RPM is a good choice, but Holley, Weiand and Ford Motorsport also have similar offerings. Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - GT40P heads? You could run a thinner head gasket as well. The reason for this is that we're actually replacing mildly worked E7TE heads. Despite adding 30 degrees of intake duration, this cam improved torque throughout the entire test from 3,000 rpm on up. GT40P heads, what kind of performance do they give? The Fora platform includes forum software by XenForo. The MPH was there to run a little better but the local track is about terrible. This is what I recommend to everyone who is doing a budget 5.0 build. Perhaps even more surprising was how well this engine idled, calmly purring with 16 inches of manifold vacuum at 980 rpm. 302 .030 over with; Scat Forged Steel Rods, SpeedPro pistons and rings . Stock 93-95 Cobra shortblock (stock cobra cam), GT40X heads, 1.7 rockers, Edelbrock Performer RPM intake, Holley 650, and longtube headers. Shop by category. I plan on running a AFM b31 cam too which has relatively small duration for the intake valve. Add a distributor designed for a carbureted 302 but make sure to install the correct distributor gear for your cam. It's a classic move we've pulled off many times. And agree the cams do help and a few tricks with the heads that I have discovered really make a difference. The valve seats have been cut on a . If you can find individual flanged headers like the obsolete MAC headers had, those worked really well with GT40P's. Win or lose, if you buy the ticket you must take the ride. For 2018, the Coyote makes 460 hp. These are some of the pictures I have showing the Explorer manifolds. Compare. Depending on the Headers you have you might be okay. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. Yep my **** is coming apart again Isnt life great! SB Ford GT40P Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. You can email the site owner to let them know you were blocked. SBF engines are modified constantly. You can have your current 28 oz rebalanced to 50. 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. Eldelbrocks Air Gap intake manifold should work well with the combination. made more power everytwhere and 40 hp is respectable. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. SB Ford GT40 Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. by travis Sun May 03, 2020 8:33 am. Pretty sure that was name, but I could be wrong. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. Manual trans. I had a set of 69 302 heads I ran for a while . These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. Actually the regular gt40's in either aluminum or iron are the good ones but the gt40p's are only a slight improvement over regular 302 heads. 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. GT40, GT40P, would be great factory heads. I was looking at putting on the GT40P heads on. (Image/Harrison Creamery). If there isnt room without disassembling half the front clip on the car, then it might be easier to remove the engine and do the conversion that way. 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. Take the assembly to a machine shop to have it balanced and install it in the block. All this is worth it. I have a 5.0 from a 1992 Mustang in my 65. i've got a short block started, and i recently came across a set of GT40P heads for FREE ( love family members). Cloudflare Ray ID: 7a2e2d95dedea1e4 In mid-1997, the Explorer and Mountaineer 5.0 L heads were revised and renamed . We compare the GT40s to modern cylinder heads as well as other heads from the era. A forum community dedicated to vintage Ford Mustang owners and enthusiasts. 1979 Indy 500 Pace Car. Scorpion 1.6 roller rockers. A forum community dedicated to Ford Mustang owners and enthusiasts. The GT40P heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. What you are trying to do is to increase the amount of airflow through the engine in order to make more power. How much HP and torque do you think I. Install a set of 1.7:1 roller-tipped rocker arms on the 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. 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. 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. The 2 heads are about the same when looking at the numbers with the GT40p heads having a slight edge. I wouldnt recommend reusing lifters though. 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. I am very happy too. Shop by category. 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. But dont think that adding a bigger camshaft will make more power. Slover primarily focused on the exhaust side of the GT40P heads. Ford Factory 5.0 Performance Cylinder Heads. This is a function of the somewhat wider lobe-separation angle of 112 degrees. 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. A forum community dedicated to Ford Mustang owners and enthusiasts. This needs to be removed and different exhaust valves, retainers, and valve springs added to turn this into a decent street head. I got lucky and found a complete Explorer GT40P engine online. I got a set of AFR heads , night and day. JavaScript is disabled. I need that part number too! The reply has so many assumptions that I cant even assume to know the answer. #3::: Do your homework,get quality parts,dont skimp. how much HP and torque? 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. Install a used set of 5.0L Mustang "shorty" headers, generally available at auto swap meets for a reasonable price. We need a build on a 400+ hp 302/6 build. As usual, there is much more to this story. If you know him, ask him. HiPo manifolds and Ill be good. 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. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. If you're running a stock cam, 1.7 rockers will work perfectly. We were cruising the 'yard a while back and located a 2000 Ford Explorer with an EFI 5.0L V-8 engine. 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. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. You can find them on later model Mercury Mountaineers and several other Ford SUV applications. Free shipping for many products! Step 2. Over $2050 for the 165/185 renegades. ported GT-40p, ported cobra intake, 65mm BBK, e-cam with 1.7s, longtubes, off-road x-pipe with flowmasters dumped. We also added a veteran Ford magnetic pickup distributor and used it to drive an MSD ignition system. Ported Hurricane Single Plane and custom 750 HP. Cast iron GT40Ps as cast flow better than non-Ps due to revised plug location/angle. You'll also have to use your 289 timing chain cover since it has a hole for the oil dip stick and fuel pump. These are a great head but do need some machining mods to make they really work well. 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. Choose a cylinder head before you install the pistons. this head fits years 95-01 explorer mountaineer mercury mountaineer . Paying a premium for a set of GT40P heads or dumping money into some to get their performance to rival aftermarket is not for me. So . Vehicle: 1972 2 door 302 maverick, 1986 5.0 stang gt convertible,66 mustang coupe, HEMI ram. Learn how your comment data is processed. Build Thread 1965 Fastback Project "Racesteed". I turned it because it was tired when I got it. 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. Gt40 heads/intake from a jy explorer, leave the . Application Fits 1979-95 Mustang 302/351 w/ OEM Small Block Ford Heads With the engine reassembled, we boxed up our second camshaft and headed for Westech's dyno. Per a UEM tech support email I have the Icon IC736 is supposed to be good for GT40 heads when I asked about it. 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. Even with relatively small valve sizes of 1.85-inch intake and 1.46-inch exhaust, the P-heads flow much better than previous. Dec 8, 2011. Im now thinking of adding a cam to match the carb. Instructions on porting the GT-40p heads here. This is the main reason why these engines are not modified as much as the small block Chevy. could the gear of off the oil pump drive(i know they're DIS), for the explorer motor be used on his dizzy? Well that article just got me very ancy, I want these heads!! this is the price for one head. That's a 40 per cent increase in power from a simple head and cam swap, and one seriously happy Mustang owner! The engine never huffed oil out of the breathers, and the spark plugs all looked excellent. 02-11-2012, 07:16 PM #6 fiveoh 86lx They almost seem like flywheel numbers rather than RWHP numbers. Calculated compression to 9.8:1. Also, you'll need to get a steel distributor gear to replace the iron gear that is currently on your distributor. 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. Let us explain. I have to agree, the GT40P heads flow better than the GT40 iron heads. The newer camshaft is designed for use with a soft bronze distributor gear, not the hardened steel gear used for older camshafts. 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. If you dont feel comfortable doing this higher a pro. This kind of improvement may not seem like much, but the owner of our test car, Jamie Holten, runs in FFW Trophy Stock where three-tenths is a lifetime. Nice to see actual dyno results instead of "butt dyno" guesses. Building a 302-inch small-block to produce 400 hp is really no big deal, but doing. . Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more! Ford's seminal 302 engine (later re-dubbed the 5.0) has been popular with budget-minded hot rodders for decades. 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. Because of this, your tuneup will probably need to be modified. SBF FORD Aluminum Cylinder Heads 302 /351w 190cc 62cc 2.02 /1.60 For ROLLER CAM. These timeslips are from 1280' above sea level. Well offer one as an example. 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 springs are new stock oem ford. That's an improvement of 22 hp over Test 2. Every thing he tells you on this site is true. We did the installation at Holten's place of employment, Motorworks, in Longwood, Florida. (Please note these are not GT40P Explorer heads). Through Central Coast you can have the heads fully prepped for your combination. United Engine and Machine sells cheap but decent pistons that will do what you're wanting. This combination should be good for about 400 horsepower and as much as 500 if you opt to use the stronger aftermarket pistons. Location: Re: Stock Ford 351W 4bbl dyno numbers. $169.50. 1.7 shaft rockers and beehives. The combination of this cam with your intake and headers will produce a very nice street engine. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more! 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. The gt40p head is considered the best OEM 302 head made. 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. Early Windsors tend to have fairly restrictive exhaust manifolds, making the addition of a set of headers that much more efficient. It turned out we were conservative on both counts. 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'd get the gt40 setup, and put an s trim on it. Someone does make the Tri-Y's headers for the early Mustangs using the "P" heads. We know what you're thinking--only two-tenths from an extra 45 hp? E303 Cam advanced 4 degrees. It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. FULL DYNO RESULTS. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. Mac and Ford Motorsport both make a GT40P spacific header. But don't think that adding a bigger camshaft will make more power. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. 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. 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. I'm also have the regular GT40 heads on my current build. The '00 Ford Explorers and Mercury Moutaineers were factory equipped with one of Ford's better 5.0L motors. 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. Hey all, I'm working on building a 302 with my gt40p heads. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. '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 A good port job can set you back another $500-$1,000. AFR 165cc 58cc Heads. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. I'll prob take a trip up there this weekend after scavenging the junkyards, thanks a million. T5z and 3.89 9" TL rear. Thanks. Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! The heads that were used were also old C8 casting with 58cc chambers. Going from your heads to the GT40p heads will bump your compression by about a point.so hello bottom end torque. Posted on May 07, 2014 by promarengine.