Has anybody else seen these. Looks like they are finally getting serious about the GT. But they only flowed it at 25" instead of 28" so not sure how much better 28 would be. From corral.net

STOCK Ford GT heads @ 25"
Lift Int Exh
.05 42 39
.10 85 88
.15 126 136
.20 166 171
.25 200 193
.30 228 207
.35 248 217
.40 261 225
.45 271 230
.50 279 234
.55 285 236

 

STOCK Ford GT heads @ 28"
Lift Int Exh
.05 44 41
.10 90 93
.15 133 144
.20 176 181
.25 212 204
.30 241 219
.35 262 230
.40 276 238
.45 287 243
.50 295 248
.55 301 250

that's what it would be with a covnersion factor of 1.058 but they really should be flowed on a bench at 28" to get the real numbers.

Sad thing is that the 05 GT also only puts down 266rwhp

Far from a stock LS1 and closer to a LT1 in a car that weights in at 3500lbs.

Might be nice heads but they don't translate to HP.

Bret

 

Wow just shows you that flow numbers dont mean everything.

 

yes but as far as a bolt-on modder is concerned, the rest should be easy

what rwhp would you expect from a well tuned engine with 300cfm heads?

 

Do you mean Mustang GT? There is a Ford GT which puts down a lot more power than the Mustang GT.

 

Yep , went back and checked. Those are on the Ford Gt, with the blown 5.4 not the Mustang Gt. They said the gt heads dont flow like that . But the GT heads are almost identical to the '00 Cobra R heads.

 

Yeah, big difference between the Ford GT and the Mustang GT.

Good numbers. This part amazed me the most...

.35 248 217
.40 261 225
.45 271 230
.50 279 234
.55 285 236

It maintains about a 20cfm difference over 0.150-0.200" of lift. That's amazing. No wonder they make 650-some horse. to Ford on these monsters.

Any word if they're available to the public? A set of these would go over REAL well on a Lightning.

 

You could get the Ford GT's motor as a crate motor, but that'll cost you 40g's .

 

Bret:
actually the do translate to power!


first off its a 300hp 4.6 Liter. I mean, not exactly a 5.7 there


2nd; that thing is very choked up. If you look in the intake duct there is some white honeycomb paper that is a horrible restriction. Just a few ponies there.

3rd: man do they love boost. 5 pounds of boost = 400hp! not too shabby for a 4.6 liter.

in the end, there is no replacement for displacement.

Are those the heads they use on the 5.4 3 valve? that thing makes impressive power, espeically concidering how low it was "designed" to rev for the F-150

 

Yes put those on a larger engine or one with an intake and cam and you will see big power just like the LS1. The sad thing is that the Ford is only 280 inches though! They need another 70 inches like the LS1 and then they would run much better!

 

Those flow number are from the Ford GT(aka GT-40) not the mustang GT. Its a blown 5.4 not the 4.6

 

The heads off of a Ford GT (NOT a Mustang GT) are 4-valve heads. Has to be a totally different casting than the 3-valve heads going on the Mustang GT. Going to venture a guess and say that, since they're going on a $150,000+ sports car, they're probably CNC'd, maybe even touched up by hand, no expense spared, etc.

 

This is sort of off topic, but does anyone have a flowchart for the 3.6L Ferrari V8 they put in the Modena? They are 5-valve heads and I would be quite interested to see what kind of air they can move.

 

sorry, thought this was about the mustang GT.

both heads are pretty good imho

 

Well that explains it then.

The 4.6L 3V is still worse than a LT1.