GM Performance 25534446 Vortec Large Port

clevo · 06-21-2012, 07:23 AM

Quote:

Originally Posted by Glenn Briglio

We do the heads for James Antonette's SS/CS engines with those heads.Not going to be easy to make that power with flat tappet cam. He has been 9.20's with the car in that class.

Is there a better cast iron 23deg head out there ?

Glenn Briglio · 06-21-2012, 12:45 PM

Quote:

Originally Posted by clevo

Is there a better cast iron 23deg head out there ?

Dart has recently came out with some decent stuff but, your asking alot with that combo. I don't know how good they are.

Dyno · 06-21-2012, 12:50 PM

I do not think there is a program for the new Dart head yet or a piston to fit the chamber.

SSDiv6 · 06-21-2012, 01:05 PM

As I understand, the new Dart offering is based on the prior offerings from Racing Head Service (RHS) when they got rid of all their cast iron heads.

Dyno · 06-21-2012, 01:47 PM

The spark plug location on the RHS is to low if you cut the head.

Glenn Briglio · 06-21-2012, 09:21 PM

Quote:

Originally Posted by Dyno

The spark plug location on the RHS is to low if you cut the head.

Yupper

Glenn Briglio · 06-22-2012, 12:20 PM

[QUOTE=Dyno;332213]I do not think there is a program for the new Dart head yet or a piston to fit the chamber.[/QUO What kinda program? Piston to fit chamber?

06-21-2012, 12:50 PM	#3
Dyno Senior Member Join Date: Dec 2002 Posts: 916 Likes: 1,139 Liked 685 Times in 204 Posts	Re: GM Performance 25534446 Vortec Large Port I do not think there is a program for the new Dart head yet or a piston to fit the chamber. Last edited by Dyno; 06-21-2012 at 11:45 PM.

06-21-2012, 01:05 PM	#4
SSDiv6 VIP Member Join Date: Feb 2003 Location: Glendale, Arizona Posts: 3,044 Likes: 712 Liked 1,583 Times in 582 Posts	Re: GM Performance 25534446 Vortec Large Port As I understand, the new Dart offering is based on the prior offerings from Racing Head Service (RHS) when they got rid of all their cast iron heads.

06-21-2012, 01:47 PM	#5
Dyno Senior Member Join Date: Dec 2002 Posts: 916 Likes: 1,139 Liked 685 Times in 204 Posts	Re: GM Performance 25534446 Vortec Large Port The spark plug location on the RHS is to low if you cut the head.

06-22-2012, 12:20 PM	#7
Glenn Briglio VIP Member Join Date: Nov 2002 Location: Massapequa Park,NY Posts: 1,283 Likes: 1,899 Liked 972 Times in 309 Posts	Re: GM Performance 25534446 Vortec Large Port [QUOTE=Dyno;332213]I do not think there is a program for the new Dart head yet or a piston to fit the chamber.[/QUO What kinda program? Piston to fit chamber? __________________ 1989 Camaro Iroc-Z I/SA B&B Auto Machine Shop.