gt 40 iron heads ?

1989GT · 01-22-2001, 12:30 AM

Hmmm some how I knew that was coming, I didn't mean to jump your sh!t man. And I'm definitly not the sh!t. You and me both know that you'd beat me in a race...judging by your 1/8 mile time. It's like this sometimes people get their facts messed up, which is easy to do with all the info floating around out there. The way you posted it looked like this, you said the P's aren't good heads IMO. Look at the 93 cobra. I took that as you saying that the cobras had P's. All I'm saying is this. Everybody is sooo quick to jump on aluminum heads these days. When you shouldn't rule out irons. Yeah you save weight. But most al heads don't flow well until you're up in the RPM's so you have no low end at all. And when you compare some of the heads they aren't all that great compared to irons. Everyone wants to compare peak numbers. Which are nice but you have to pass mid-lift twice, everytime the valve opens and shuts. I know people that have slowed down when going from gt 40's to al heads. If all you're gonna do is race then al is probably the way to go. If you don't drop below 4000 RPM and shift at 6200 RPM. But I drive my car every day and it's got tons of low end torque but it pulls hard to the rev-limiter. That's what I was going for. It's a very nice N\A combo. Now if I was going forced induction I would have bought a different head. But I'm looking to spray in the near future and I figure it'll work out well. Well I've gone on long enough. Any more question or comments and I'll try my best to help\answer them.

------------------
89GT,T-5Z, D.S.S. 306 shortblock w\main support, B-303 cam, Cobra intake, GT40P heads, 1.72rr, MAC "P" headers, MAC off-road H-Pipe, MAC true-fit w\tips, 373's...and the list goes on!
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01-22-2001, 12:30 AM	#7
1989GT Registered Member Join Date: Apr 1999 Location: Cincinnati,OH Posts: 1,511	Hmmm some how I knew that was coming, I didn't mean to jump your sh!t man. And I'm definitly not the sh!t. You and me both know that you'd beat me in a race...judging by your 1/8 mile time. It's like this sometimes people get their facts messed up, which is easy to do with all the info floating around out there. The way you posted it looked like this, you said the P's aren't good heads IMO. Look at the 93 cobra. I took that as you saying that the cobras had P's. All I'm saying is this. Everybody is sooo quick to jump on aluminum heads these days. When you shouldn't rule out irons. Yeah you save weight. But most al heads don't flow well until you're up in the RPM's so you have no low end at all. And when you compare some of the heads they aren't all that great compared to irons. Everyone wants to compare peak numbers. Which are nice but you have to pass mid-lift twice, everytime the valve opens and shuts. I know people that have slowed down when going from gt 40's to al heads. If all you're gonna do is race then al is probably the way to go. If you don't drop below 4000 RPM and shift at 6200 RPM. But I drive my car every day and it's got tons of low end torque but it pulls hard to the rev-limiter. That's what I was going for. It's a very nice N\A combo. Now if I was going forced induction I would have bought a different head. But I'm looking to spray in the near future and I figure it'll work out well. Well I've gone on long enough. Any more question or comments and I'll try my best to help\answer them. ------------------ 89GT,T-5Z, D.S.S. 306 shortblock w\main support, B-303 cam, Cobra intake, GT40P heads, 1.72rr, MAC "P" headers, MAC off-road H-Pipe, MAC true-fit w\tips, 373's...and the list goes on! Throttle Junkie Powered by Ford! 12.824 @ 107.05 MPH