MustangWorks.com : Ford Forums - View Single Post

Unit 5302 · 06-17-2001, 08:32 PM

So, since GT-40 heads are iron they are crappy?

Guess 12's just aren't good enough for a set of stock heads. Those heads will flow 85% of what Edelbrocks will flow, and that's for free. True, the combustion chambers are too big, but they are still a solid head for street performance. The bigger combustion chambers should be excellent under a few psi of boost too.

Granted, they aren't a match for aftermarket aluminums for all out potential, but I'd certainly take a set.

I'd say he should expect to save about 3-4k vs a Cobra.

[This message has been edited by Unit 5302 (edited 06-17-2001).]

06-17-2001, 08:32 PM	#11
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	So, since GT-40 heads are iron they are crappy? Guess 12's just aren't good enough for a set of stock heads. Those heads will flow 85% of what Edelbrocks will flow, and that's for free. True, the combustion chambers are too big, but they are still a solid head for street performance. The bigger combustion chambers should be excellent under a few psi of boost too. Granted, they aren't a match for aftermarket aluminums for all out potential, but I'd certainly take a set. I'd say he should expect to save about 3-4k vs a Cobra. [This message has been edited by Unit 5302 (edited 06-17-2001).]