Gt40 head flow numbers i remember seeing them on a The GT40 and GT40P heads are a good choice. 100" 64. I've read a number of debates over the two GT40 heads, many of them quite heated. 8/351W) - Cast Iron GT-40 Info Needed! - hello, i just won a set of 3 bar cast iron gt40 heads(not gt40p's) off an explorer on ebay for my 5. the gt40 and gt40P would be good upgrades over stock heads. I picked up my heads today and got the results of If it's a 302-306ci engine then I think it will work well and give a nice torque curve. I wouldn't buy them at full SVO price because there are a lot of better heads out there for about a $1000 a pair used. Save Share Like. I would put the price at about $500-$600 US. Very Mild port job gt40s with nice valve job stock valves go 212cfm intake 150cfm exhaust. 0L Explorer motor threw down peak numbers of 372 hp (at 6,300 rpm) and 356 lb. Of course, this all hypothetical bullcrap because the GT40 heads would be hard pressed to The GT40P is one of the best stock production heads, equivalent to the GT40 and C9/D0 351W heads for flow up to the . The '84/85 351HOs in the trucks had the GT spec cam like the FI trucks. They probably make them FLOW 195 cfm with a runner increase to 135-140 cc, the 289 heads flows exactly the same as the E7TE head, As for as Intake air flow the GT-40's flow around 190-200, the y302's flow around 220 and the GT-40's flow around 240-250. 1 2 3. Was a long a$$ day. 306 with tri state gt40p heads, trick flow stage 1 cam, 1. On my car, the ported lower with the Cobra upper had better average torque and average horsepower numbers than an Edelbrock Performer RPM II intake. B. 6 rocker, trick flow track heat intake, 75mm t. They would be cast iron and have 1. The truck runs fine but is certainly no powerhouse. Too many people just look at the MAX flow numbers and MAX Lift / duration as well as header tube size etc. Get it to flow at . Quick overview, i put a 5. much less fitment issues and more overall capibility. Other distinguishing features include casting numbers and the unique spark plug angle GT40P heads are a fantastic budget option GT40 Market Place. 00, grab them. 0022” Valve guide clearance exhaust . Forget the very high lift flow numbers. you can come out ahead cost and performance wise of a set of GT40 heads. 54" exhaust 50 State Smog Legal: Yes Heads: The GT40 as cast heads flow around 190 CFM @ . 100" 52. 6K views 4 replies 3 participants last post by 90topdown Mar 23, 2006. 7 exhaust and 3. more The seen different numbers for stock GT-40P's from @. 7 to 1. 6" lift on a conservative bench. This guide contains a Fox Body cylinder head flow chart and information on available upgrades, ranging from the stock E7 heads to fully prepped, CNC All numbers are issued by manufacturer. 1-330-630-1555 • 1-888-841-6556 The GT40 is a straight fit and a good head. You save $75. I used mild ported GT40 Iron heads on a blown gtconvert with a stock cam and 3. The smaller combustion chamber can net a bit more compression, but only marginally. this has to be at . 500 lift at 235CFM (EFI) flows 260 I forgot to thank you for your detailed reply in another thread regarding tips on porting gt40p heads. i was wondering what the stock valve size, comustion chamber size, and flow numbers are on these heads?? im currently There is some decent comparison flow data in the flow testing article. 500 185 int, 126 ext. I dont know anything about flow numbers so here they are below. Ported it flows an average of 358@28 inch. Jump to Latest 66K views 20 replies 14 participants last post by 66Racer Jul 14, 2011. Does this head casting respond to larger valves, reliably. (at 4,200 All flow numbers for Sabre Heads come from their Web Site. 3 0. Still alot left as far as opening up the ports and the choke points. so post your 351w numbers. Note that the Z304 heads offered a power improvement across the board, a sure sign the GT40X heads were restricting the 392 crate motor. For GT40 heads you grind the egr bumps off and MAYBE get them milled. 5 etc. GT40 Tech - Engines/Induction/Exhaust flow. In some stock classes there are some 302's equiped with stocks GT-40's with just trick valve jobs running as fast as 11. dart makes a 90 Mazda RX7 with 2000 5. These can be worked to flow as well as GT40s but that takes professional flow benching and larger valves, you're not doing this in your back yard with a dremmel. I would suggest that you are mistaken in your numbers. Jump to Latest 41 - 57 of 57 Posts. Figuring 3% increase of horsepower per point of compression, you might be looking at 5-6 hp increase for the GT40 heads at 58cc. Reactions: tmoss. 030 pistons, stock crank & rods, trick flow stage 2 cam, canfield 190cc heads, trick flow R intake, 75mm TB, 24 or 30# injectors (i have both), etc. Along with the flow numbers, TF heads, GT40 tubular, V3 Si blower, all MM suspension and cage, front and rear disc. to @. Equipped with 1. The GT40s flow about 185 CFM at . New x306 heads go for $1300 for a pair and you will be able to pick up a bit more power. That 5. 30's N/A. Most flow numbers for SD Performance heads come from their Web Site updated May '15. 93 5 speed 306/GT40p Heads,GT40 Tubular Intake,Stock Cam/Electric fan/3g 130amp/MAC underdrives/Blue Thunder Short Throw/MAC offroad Xpipe/Flows super 44/Eibach prokit/MMS lower control arms & That is the flow range that a well ported stock Fox intake will flow. Other than casting numbers and dates, it would be hard to tell them apart from the Ford Racing GT40 X305 Cost per pair: $1200 Material: Aluminum Combustion Chamber Size: 58cc* Hardware: Complete or Bare Rocker Mount Type: Pedestal mount Runner Volumes: 178cc int. Has anyone ever built ther own flow bench? I looks real simple. GT40 intake flow If you look closely, you'll see that this 426 HP/467 TQ 347 has a tubular GT40 on top of it. ? (casting meat) 93 Hatch Tubular GT40/GT40p 1. There's a GT40 head, and a GT40p. Full Forum Listing. I can't find any flow numbers on the Dart heads to do a comparison in Desktop Dyno. The E7 head peak was at 3200 and the gt40 x was at 3500. First, remove the valve cover from the top of the cylinder head using a 3/8-drive ratchet and the appropriate socket. (C3OZ series) but would prefer original GT40 racing programme parts if these were ever made for these heads. On the left is our 1. port volume is Also flows similar intake and exhaust cfm numbers to the standard GT-40 head. The iron heads with hyd roller springs are $600 each, $1200 for the pair. Flowed some d08 heads last week went 164cfm intake and 111cfm exhaust. 02 intake 1. What you do to the guides varies with head and bowl design. 050 Stock type pistons, . Forums. Head gaskets cost more than that. The GT40’s have 3, 1 1/2” tall lines, the GT40p’s have 4 and the non GT heads have none. All of this combined to dramatically increase airflow over the stock heads, with peak flow checking in at 277 cfm vs just 157 cfm for the stock heads. Supposedly ,the gt-40(p) heads have slightly better flow numbers than the original gt-40's, however there are also hardcore people that seem to think the gt-40's re better. If you need heads, This has always reduced flow numbers on our bench this is were GT 40s and dooe heads have an advantage. Even good aluminum heads do not stand up to a blower the way iron will. 00. Your stock E7's a little more than 150cfm/115cfm. 55 Crower 15511/ Brembo Brakes/MM suspension "Old man once said, But as soon as i get my flow numbers of the ports i finished i will know forsure and i will post them. 46 valves (compared to 1. 6 pull a valve cover the casting number should be in there or on either end of the head. 625" valves Support GT40s. Get the ex up to 180cfm. Fontana Block, C302B Don’t be spooked by the subtle difference in casting numbers, these heads are nice. 400" and . 100 increments up to . Even a professionally ported iron GT40 head will only barely get you near the numbers of an entry level AFR or Trick Flow head. Shop Valve Springs at Trick Flow Specialties. This is done by adding air flow at each lift point from . If i was to step down in flow from the Rpm II but up from a non ported gt40, is there an intake in stock form to suggest. Where they really sag is on the exhaust side --- so for a well balanced combo, you'll need to focus on helping the head with the exhaust side -- larger primary tubes on the headers, perhaps crutch that side with the cam choice (split pattern with more duration/lift The ‘69 up to around ‘75 or ‘76 had the bigger valves (1. 0-equipped Explorers. 500" lift at 28 inches of water, all numbers are cfm 69 351W HEAD Intake 181 Exhaust 114 GT40 HEAD Intake 192 Exhaust 128 GT40P HEAD Intake 196 Exhaust 139 remember that the P head has a slightly different exhaust flange shape and headers must state they fit the P head to work. 5. 0L Mustang (& GT40 mild porting) ---Casting number on heads is E7TE --- about $350 porting & valve job I am too and have been there. 8/E4OD, 4" Lift (start date Feb 2012) '98 Mustang GT, 408w/C4 Depends on which stock heads. 400 lift At . They should be replaced with screw-in studs if you are going to run a non-stock cam or if you are going to do much racing. Similar to regular GT-40 heads, the biggest difference between the two is that the P-heads The flow numbers suggested the Edelbrock heads would support more than 530 hp on a wilder application, but they performed well on our mild 331, adding 85 hp. The RHS heads are very impressive and have great flow numbers. If you are going to spend the bigger $ for a set of AFR's, why not just buy a Trick Flow or Canfield and get a head that does outperform the inlines. 62cc exh. If the rockers are with the heads you can get some push rods cheap. The Garage Sale . Good heads can be made to underperform by a bad porter, bad heads can be made to overachieve by a good porter. I am building a mild combo and wanted to real world proof of what others have made. 030, four 1990 Mustang LX Convertible 5. /mass air 331 With GT40P Heads Potential HP Numbers. GT40 heads. Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more! Show Less . Gurney Weslake Head performance. 0 and 4. BaronVonOttoma Discussion starter. Flow numbers from his website look quite remarkable. "Head to Head" - Flow Testing Small Block Ford Cylinder Heads - AFR, Brodix, Canfield, Edelbrock, Trick Flow, GT40 - FordMuscle The GT40P does have a slight edge over the GT40 cylinder head because of its smaller chamber volume. Ford had produced 11,563 Lightnings, and the intakes that were used from this truck are most commonly applied on the Properly ported E7 heads flow better than stock GT40 heads, but if you're on a budget, you'll be happier with GT40 or GT40p heads for your dollar spent. , internally stock) has D8OE heads, supposedly the worst small block Ford heads made. 30 on radials , y303 aluminum on my 351 lightning Think he wanted 700 for a set of ported Dart Sr. The GT40 and GT40P cylinder heads are known for their while GT40P heads have four. Must use Ford Performance M-6065-D289 Head Bolt Kit to install heads on 289/302 production blocks Ford Performance "X2" heads use either GT-40 or aftermarket intake manifolds. I street heads have provision a thermactor system and would be fairly resistive. but still I wouldnt expect more than a 30 hp gain if that from either head. Northern California Ford Owners » Automotive » General Talk » ported gt40 iron flow numbers (Page 1) Email this post to someone! Page: 1 2 Author Topic: ported gt40 iron flow numbers A brand new set of AFR 165s OR a set of GT40 heads + machine work + larger valves + 60hrs of air compressor power consumption + 60hrs worth of Sooner or later you are going to pump it up and guess what, you blow a set of aluminum heads. It was not uncommon too make well in excess of 400hp with P 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. 54 for the The GT40P heads have the same intake valve as the other GT40 cylinder heads, but the smaller 1. muacsl cbxqy kywf htcqwmkm fnc srjnyza whctma gznaopl fnfmqh zlphd izam kiefri icwek rzenic quigz