More can be had The average flow numbers taken at .100 increments up to .500 beat every head in article but the AFRs and they only edge out these by a little. Ford produced 11,563 Lightnings from 93 to 95. Giving new life to GT40X heads - Don Terrill’s Speed-Talk 1996-2001 Ford Explorer There are a number of Chinese heads available but nothing I would consider. It now out flows a GT-40 & Cobra intake according to flow numbers provided by Richard Holdener's 2000 Dyno Pulls book. #1---Head Flow Charts & Comparisons : 12/23/2021: There are enough flow numbers on our website to keep everyone busy for a while. Heads It is interesting to me that GT-40 'P' heads flow better than the GT-40 heads that came off … It has all the bells and whistles and even gives us information that we didn't even ask for. Small Block Ford Cylinder Head Porting e-mail us: shadydell2005@aol.com or call (814) 237-4990 Ported Stock Lower Intake. It has all the bells and whistles and even gives us information that we didn't even ask for. It came back today along with the following airflow chart (numbers in CFM, before and after 'extrude hone abrasive flow machining'): Runner 1: 204, 277 Runner 2: 215, 299 Runner 3: 216, 304 Runner 4: 212, 293 Runner 5: 201, 281 Runner 6: 221, 304 Runner 7: 218, 299 Upgrading Fox Body Cylinder Heads - AmericanMuscle I ask because aren't the valves, in the gt-40 already around 1.90 and 1.60 already? Stock air flow intake is 166 cfm. The GT40P cylinder heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. Like other stock castings, there is plenty of room for improvement with this head. I think they do but I'm not 100% positive. We now have a SAENZ model 680 flow bench which we all enjoy using. I've seen Trick Flow H/C/Is make less than me and more than me. Good driveability manners. Ford GT40P cylinder heads have 4 vertical bars and some are stamped "GT40P". Stock gt40 heads are worth 40hp over stock as cast heads, Edelbrock 60 to 80 hp over stock heads, AFR, RHS, and Trick Flow 100+ hp over stock. 289 heads are way over rated in my opinion. Picking up some 40-50 cfm over stock. The GT-40 (P) cylinder head is popular for classes that must run a stock Ford production head. GT40 Heads. Is this a good deal? | Page 2 | Vintage ... The flow is low where you need it. cam ,2800# mustang. GT40 He only gives a part number M-6049-p303. The only heads he gives a casting number for are these 1993-1995 cobra GT-40 heads. Dyno Numbers: GT40 vs Twisted Wedge | Ford Mustang Forum You get what you pay for.. if you want a dope set of used aluminum heads then throw down $1100-$1200 for used AFR 185s. The sets include steel core head gaskets, composite intake gaskets with end seals, steel core laminate exhaust gaskets, and premium valve cover gaskets. Intake Flow Numbers. Bigdogs Porting - Posts | Facebook Intake Flow Numbers It now out flows a GT-40 & Cobra intake according to flow numbers provided by Richard Holdener's 2000 Dyno Pulls book. The Ford F-Series is a series of trucks marketed and manufactured by Ford since the 1948 model year. ported GT40P flow numbers, and pictures Windsor Power ... small differences in the low-lift flow could be accounted for in small testing changes between the two environment and flow benches. head air flow. Feb 24, 2006. Aslo, don't forget you will need to … I looked at all the heads available including the factory heads and compared all to stock heads. ported gt40 iron flow numbers - Northern California Ford ... The ‘69 up to around ‘75 or ‘76 had the bigger valves (1.84/1.54) and typically low to mid 60’s cc chambers. to AFR 185s they picked up 75 hp. These heads also boast the larger exhaust valves but don't flow as much as the GT40P that I will speak about later. 5-Axis CNC Ported for 2.140" Intake and 1.810" Exhaust. The GT40P heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. 5.0 Flow. E-Street cylinder heads feature as-cast ports and are designed for entry-level street performance applications operating in the idle-to-5,500 rpm range. Logged. We aren't in the 60s anymore. He also identifies the GT-40p head as being an explorer head. in a 5.0 mustang and super fords test on a 393 stroker, only switching from GT40 aluminum heads. The Floo-tek junk, just like Pro Comp are chinese crap. If you can find some P heads for similar prices to the 40s, you'd do well to go with them methinks. Increase the horsepower and torque output of your push rod 5.0L engine with the Ford Racing Turbo-Swirl GT40X Aluminum Head. Get the ex up to 180cfm. Valve Sizes: 1.85" intake 1.46" 50 State Smog Legal: No Notes: * For new assembled heads. Though, wont do a dyno til I get a wieand stealth on. My goal is 275rwhp. That's great if you're drag racing and you want to squeeze every ounce of HP out of your SBF. We open up the Intake Port enough to still use the same Intake Manifold and gain overall performance without making the Casting thin. The Windsor engines just couldn't be built at the time to compete effectively with the strongest GM and Mopar small blocks offerings, and the Cleveland engine was the answer to that problem. They are available for popular V8 engines. At one time I was going to run the nkb heads on my 302 but I decided to stroke it and buy better heads. E-STREET ™ CYLINDER HEADS. The cast-iron Sportsman head (M-6049-N351) from Ford Racing is a nice compromise between the Z head, GT-40 Turbo-Swirl, and the Yates NASCAR head. The GT40 "P" has similar but revised 144 cc intake ports as the 69-70 W head but with more efficient combustion chambers with of course that straighter angled spark plug that requires special headers. 289 heads have smaller chambers (54cc I believe) which will add some compression but not enough to make up for the difference in flow. I'd look for a set of used aftermarket heads. Started in the late 80’s the GT-40 heads were the result of not only the Ford Engine Group, but also involved the Marine Group, Advanced Engineering Group and SVO. Which had a 351 (5.8L) Windsor V8 with 8.8:1 compression, a 4-inch bore and 3.50-inch stroke. The C code has a 13 CC dish as well as a some of the so called flat top aftermarket pistons. The gt 40's ported and polished made 270 hp at the rear wheels, the E7te's made 254hp fully ported and polished. Would there be a gain in head flow if you put 1.94 1.60 in the P's? with the 1.9/1.6 valves. There are alot of variants in aluminun GT-40 Turbo-Swirl GT-40X The explorer head GT-40P does not have an angle spark plug holes. Yeah - what they said. Mar 6, 2007 (Edited) GT-40 became a catch-all name applied to several products for marketing reasons. Ford Performance "X2" heads use either GT-40 or aftermarket intake manifolds. These lower intakes tend to get interchanged a lot. One GT40 intake we received did have the original lower with it – it had a lower like the one in the below picture that shows a part number with F2 (RF-F2ZE-9K461-AA) in it and can be found on the front water cross over - (RF-F3TE-9K461-EA) is also a valid GT40 lower casting number. A great resource when deciding on a set of heads. ... 3 FOR Ford GT-40 EFI 220 CFM 250 CFM 280 CFM 310 CFM (Welded) 4 EDL Edlebrock Perfomer EFI 220 CFM 240 CFM 300 CFM 320 CFM ... BBF Ford Heads: SBF Heads: SBC Heads: LS1/LS6 Intakes: LT1/LT4 Intakes: The GT40 "P" has similar but revised 144 cc intake ports as the 69-70 W head but with more efficient combustion chambers with of course that straighter angled spark plug that requires special headers. Compared to the as-cast 190 cc heads, the CNC-ported 215 heads offered more flow everywhere. Like other stock castings, there is plenty of room for improvement with this head. Stock air flow on this head tops out at 190 cfm intake and 128 cfm exhaust. When “ Undercover Ported “, the GT-40 head will flow 202 to 210 cfm intake and 145 on the exhaust side. 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. These were used in the mid nineties on the 5.0 V8, but there are two variations: early and late. (casting meat) In various locations, "GT40" is cast in raised characters on each side of the cylinder head. Locate the Ford casting number for further identification. Ford casting numbers are part numbers cast on either the top of the cylinder head, or on the bottom, which requires removing the cylinder head. That's about 10 CC's greater volume then your 289 heads. I can't remember the exact numbers of the GT40 and 351W heads so I don't know if they flow better. Gives me a little hope for my 85 GT with the 331 and GT40 heads. 1-330-630-1555 • 1-888-841-6556. Small Block Ford Cylinder Head Porting e-mail us: shadydell2005@aol.com or call (814) 237-4990 Ported Stock Lower Intake. … I can't wait to get to a dyno to see the torque and HP curve. Get it to flow at .400" and .500". Stock gt40 heads are worth 40hp over stock as cast heads, Edelbrock 60 to 80 hp over stock heads, AFR, RHS, and Trick Flow 100+ hp over stock. May have to use the stock worked on 4180C til I can afford to get a Holley 650. We aren't in the 60s anymore. These GT-40X heads feature a 64CC Combustion Chamber to greatly improve the airflow over the original GT-40 design allowing you to bolt on 65 more horsepower. FLOTEK High Performance Cylinder Heads 1712 Read Street, Evansville, IN 47710 Phone: 1-800-270-0095 I Fax: 812-421-0983 Intake Flow Numbers. to 7/16 in., Ford, Small Block, Set of 20 Part Number: TFS-51400419 Intake lift Flow CFM Exhaust lift Flow CFM 0.100" 64.2 0.100" 52.3 0.200" 114.3 0.200" 97.7 0.300" 166.5 0.300" 128.0 0.400" 199.4 0.400" 136.5 0.500" 212.5 0.500" 134.1 0.600" 217.4 M-6049-X303/X305 Intake lift Flow CFM Exhaust lift Flow … With “ UnderCover Porting ” the intake side is improved to 190 cfm. GT40P Heads w 1/94 intake Valves & 1/54 Exhaust 1 inch spacer 24 lb injectors 75 mm Pro m Mac 1 3/4 longtubes, offroad h-pipe 4. Lawrence, Kansas. 1984 Thunderbird -- 1989 302 HO, GT40 heads with Trick Flow spring kit, Edelbrock Performer 289 intake, Edelbrock 600 4 bbl, 85 Mustang distributor, Jegs o/r h pipe, Dynomax mufflers, Mustang AOD and shifter, Mustang … The GT40 heads are readily available from Explorer or Mountaineers in the wrecking yards. Though an extra 110 hp (measured peak to peak) was nothing to sneeze at, the airflow offered by the Trick Flow heads suggested they could support 500 hp on the right combination. That all changed in the late '80s when Ford Motorsport, now known as Ford Racing Performance Parts, released its aluminum GT-40 heads. Darrell said: GT40s definitely flow more. The early heads are clearly marked "GT40" and have three raised bars in the casting that looks like "III" on the end of the head. Thumper said over 230 on the intake side, So I would guess comparable to what other heads flow at that level on the exh. Cylinder Head Porting. The GT40p heads really won't flow much over .500" lift unless you spend some time and/or money on them. Should I be able to reach my goal with these heads? Let's start with the GT40, these heads can be found on Ford Mustang, Explorer and SVT/truck Lighting applications. If airflow though a valve port is plotted on a graph for the entire valve cycle (from opening to peak lift and back to close), the area under the curve is total airflow, which corresponds to total power. 235 @ .050 is possible along with improvements at each lift point. After the Trick Flow head, cam, and rocker upgrades, the modified 5.0L Explorer motor threw down peak numbers of 372 hp (at 6,300 rpm) and 356 lb.-ft. (at 4,200 rpm ). The Ford 289/302 heads were available with many different valve sizes. GT40's originally came equipped on the following V8 engine vehicles: GT-40 59.7 45.2 E7TE 55.1 39.8 '69 351W 56.95 39.7 289 51.45 35.85 GT-40 Al. Cut, shortened, fully ported and welded upper along with high flowing stage 3 351w Gt40 lower. The GT40 Mk II was powered by a big-block 7.0 liter (427 cubic inch) V8 borrowed from the Ford Galaxie. Mills - Flat or angle mills could affect flow numbers and might require a thicker intake gasket. Ported correctly they will flow ~215-220cfm GT40/GT40P flow ~190cfm Ported correctly GT40s flow ~230cfm Trick Flows flow ~250cfm power gain depends on how well the engine parts take advantage of the added flow potential. Ford racing "X" heads are designed to use either GT-40 or aftermarket performance intake manifolds, M9439A50 intake gasket, and AGSF-32C spark plugs. The GT40 Mk 1 used a 4.7 liter (289 cubic inch) based on that of the Ford Mustang. GT40 cylinder heads have 3 vertical bars stamped on the side of the head as well as the word "GT". The GT40P does have a slight edge over the GT40 cylinder head because of its smaller chamber volume. The smaller combustion chamber can net a bit more compression, but only marginally. Flow data shows them to flow within a few CFM (cubic feet per minute, more CFM is better) of each other. Trick Flow Specialties TFS-51400419 - Trick Flow® Head Bolt Bushings Head Bolt Bushings, 1/2 in. … ... 13 TFS Trick Flow Track Heat 225 CFM 250 CFM 310 CFM 330 CFM . Installation Notes. Stock air flow on this head tops out at 190 cfm intake and 128 cfm exhaust. Feb 24, 2006. Ford lighting 351w gt40 lower/Explorer gt40 upper manifold flow test Part 2 after stage 3 Here's the results of this customers stage 3 on this setup. Sure there are better aftermarket heads that flow better. you wont have to worry about the non angled spark plugs either, the GT40s spark plugs run straight, the Darts run like a stock head, they flow way more and come with valves, bolt in studs, springs etc. Designed for bolt-down rocker arms part number M-6564-B351 for a 1.6 ratio or use part number M-6564-A50 for a 1.7 ratio.Application. best stock ford ever made. Ford GT40 Cylinder Heads. Head Flow Numbers. This intake has been welded in the corners to allow further porting. They flow better than the later year heads (except for the Lightning’s which had GT40 iron heads), but the engines was choked with a very low profile intake and pretty terrible exhaust manifolds. They are available for popular V8 engines. First, remove the valve cover from the top of the cylinder head using a 3/8-drive ratchet and the appropriate socket. What a difference in … Check manifold for port match; not all intakes are compatible due to tall high-flow intake ports "X2" cylinder heads use Motorcraft® AGSP-32C spark plugs Use Felpro® exhaust gasket part number 1415 running this heads for 2 years plus on the race track on a stock bottom end ,292 comp. Using the flow numbers from the recent MMFF articles on heads I surpassed the "Y" head numbers by 35-50% at all lifts up to .400 where the gain was about 5%; but at .500 the "Y" head beats these by a whopping "1" CFM. So you think the gt-40 heads on your combo would put it at 370? just seein if anyone knows where i can come across a flow chart comparing ported stock heads vs. stock or ported P heads, im guessing it wouldnt really be worth the trouble and money over my ported stockers, unless the P's can be ported and really outflow ported E7 heads, thanks guys I know ported 40s and DOOE heads flow the same. One GT40 intake we received did have the original lower with it – it had a lower like the one in the below picture that shows a part number with F2 (RF-F2ZE-9K461-AA) in it and can be found on the front water cross over - (RF-F3TE-9K461-EA) is also a valid GT40 lower casting number. The GT40 and GT40P heads are a good choice. There will either be a "Y" or "X" along with a three digit number: FMS-M-6049-X303 is the 64cc head FMS-M-6049-X305 is the 58cc head there is also an X304 part number that is sold as a bare head, but I do not know the chamber size. But .5" lost a bit of flow. A word of caution though: just behind the valve guide and in front of the thermactor divot is a water jacket, so be careful in this area. Installation Notes. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. AFR recommends the use of .120" thick-wall pushrods. The stock hydraulic, flat-tappet camshaft specifications are: duration at 0.50; intake 200 degrees and exhaust 214 degrees; advertised duration is 260 degrees intake and 274 degrees exhaust. I know they made the valves smaller, and still got greater head flow. The numbers are from our in-house flow bench. Kinda a small head for a 393 CID motor. Head is sold individually 180cc intake runners 62cc exhaust runners 1.94" intake and 1.54" swirl-polished exhaust valves 58cc chambers Performance valve springs (.550 lift) 130 lbs. The same 1.780″ intake valve was used in each test. I find that hard to imagine based on published flow numbers from gt-40 heads. Ford casting numbers are part numbers cast on either the top of the cylinder head, or on the bottom, which requires removing the cylinder head. Darrell said: GT40s definitely flow more. Slotted above the Ford Ranger in the Ford truck model range, the F-Series is marketed as a range of full-sized pickup trucks. As far as those junk knock off heads go, I would run an iron GT40 head before I'd run those. 289 heads are way over rated in my opinion. Most flow numbers for SD Performance heads come from their Web Site updated May '15. You should be able to hit 300hp with some moderate port work. I could get higher peak numbers if I wanted to work more on the intake runners but that wasn't where I wanted to improve when I started the work. 3. Forget the very high lift flow numbers. If you are broke as a joke then scape together $275 and pick up a set of GT40 irons. The hp bump of the heads is on a modified short block that will use the air increase, it's going from 350 hp to 450. #1---Head Flow Charts & Comparisons : 12/23/2021: There are enough flow numbers on our website to keep everyone busy for a while. in the going price of gt40 heads and the porting then it would come in at about 900$ range. The pinch is now the smallest point in the port, would just like to open it a bit more at the 2.5" point if the measurement is correct. Af your interested in same dyna numbers with a parted GT-40 style (fañf and when you upgrade heads), see my Sig. GT40 F3ZE cobra headsTrick Flow stage 1Stock bottom end - rebuiltProform roller rockers 1.6 ratioFlowmaster Super 44's 2.5 dual exhaust front to back Like other stock castings, there is plenty of room for improvement with this head. I have some gt40p heads that I was going to enlarge the head bolt holes so they would fit a 351w. 65.1 48.26 GT-40X Al. We now have a SAENZ model 680 flow bench which we all enjoy using. 289 heads have smaller chambers (54cc I believe) which will add some compression but not enough to make up for the difference in flow. Ford GT40 Cylinder Heads. GT40 F3ZE cobra headsTrick Flow stage 1Stock bottom end - rebuiltProform roller rockers 1.6 ratioFlowmaster Super 44's 2.5 dual exhaust front to back GT40 MCSA calculator.xls (29.5 KB - downloaded 326 times.) You don't need to spend a fortune to get a top-performing, lightweight aluminum cylinder head for your small-block Ford V8. They had target airflow numbers matching or exceeding the 1968 GT40 race head which had That's impressive numbers from a 302! Huge flow numbers may be impressive, but optimizing airflow at mid-valve lift is key to power. ... flow too. The intake side low lift numbers are excellent and the exhaust speaks for itself. Most flow numbers for Scott Johnston heads come from them Web Site updated July '09. All flow numbers for Sabre Heads come from their Web Site. Even if you aren’t a car enthusiast, the action, acting, and accuracy of the story are well worth your time. The link has been posted on this site a few times. If you fig. Is the Ford GT 40 a British car? There are a number of Chinese heads available but nothing I would consider. Remember those flow numbers are on a flow bench to try to simulate ideal conditions at Wide Open Throttle. as there has been alot of good work there. It has 2.02/1.60-inch valves for improved flow along with 64-cc chambers. But I realy have no idea what the exh. Updated Aug. '12 — and were converted from 10" to 28". posted 10-21-2005 12:45 PM. ported E7's vs. GT40-P flow numbers ? The P head exhaust port has a lot of sharp edges and can really benefit from just a little grinding. Well, stock 351W heads flow better then stock 302 heads and GT40 heads flow better then stock 302 heads. Alongside the F-150 (introduced in 1975), the F-Series also includes the Super Duty series (introduced in 1999), which includes the heavier-duty F-250 … E-Street cylinder heads feature as-cast ports and are designed for entry-level street performance applications operating in the idle-to-5,500 rpm range. Ford’s part number convention generally follows the format of a four-digit casting code, followed by a four-digit basic part number, which will be “6090” for a cylinder head, followed by the revision version. E-STREET ™ CYLINDER HEADS. that was the only change between the two tests, and the difference in power. This Flo-Tek head has a long list of high-end features, minus the hefty price tag. 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. My 351w is a 1974 with stock heads and pistons. Does this head casting respond to larger valves, reliably.? The cast-iron Sportsman head (M-6049-N351) from Ford Racing is a nice compromise between the Z head, GT-40 Turbo-Swirl, and the Yates NASCAR head. heres a few shots of the heads: this is a … In the As Cast form this 440 head has many CFM choke points. They also installed … 5.0 Flow. 1993 Lightning. Perhaps cheaper used. GT40/GT40P heads were a more free flowing cylinder head that outperformed the factory E7 heads that were found on most 5.0 Fox Body Mustangs. 14 TFS -51500003 Trick Flow - R 345 CVM 370 CFM 395 (+) CFM ... 3 FOR Ford GT-40 EFI 220 CFM 250 CFM 280 CFM 310 CFM (Welded) 4 EDL Edlebrock Perfomer EFI … Ford GT40P Cost per pair: $650* Material: Iron Combustion Chamber Size: 60cc Hardware: Complete Rocker Mount Type: Pedestal mount Runner Volumes: 155cc int. Improved Air Flow. This head is suggested more for 351W engines, but can be used on the 289/302 using a head bolt adaptor kit. About Gt40p Flow Heads Numbers . The 1.450" valve can still be used for heads getting a valve job also but will not have the same flow advantages as heads specifically machined for the 1.460" valve. they might have the same port size but what they flow in CFM is crazy different. With this set-up, they are a 1/3 closer to the TW heads. are you asking about the gt-40p heads or the gt-40? flows maybe thumper can jump in and say. We took my buddies car to the dyno with both sets of heads, the GT 40's and the E7TE's. The numbers are from our in-house flow bench. We have reworked several sets of these heads for applications where no porting is allowed. Stock air flow on this head tops out at 190 cfm intake and 128 cfm exhaust. When “ Undercover Ported “, the GT-40 head will flow 202 to 210 cfm intake and 145 on the exhaust side. check out the dart roush heads, they come complete for around 1800 and will absolutely abolish gt40 heads. Exhaust flowed 145cfm@.300, 154@.400, 156@.500, 158@.600. The casting number, if located on top, is in the center of the GT40 head. Save money for other upgrades by purchasing only the gaskets you need for a cylinder head swap or reseal with a Trick Flow premium head gasket set. It has 2.02/1.60-inch valves for improved flow along with 64-cc chambers. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. The GT-40 (P) cylinder head is popular for classes that must run a stock Ford production head.
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