AFR225s on a 331

4Jenna

Founding Member
Sep 12, 2001
4,326
6
69
AZ
Would like to discuss....
To big?

331 (A4)
Turbo
Glide
Solid roller

Lookin for low 9s, currently running tfs tw and I know the AFRs would make the journey alot easier.
Plans of a 4.125 are down the line as well

All opins welcome
 
My new setup wont be a 4.125 but plenty guys run these heads even on a 4.00 bore with great results. I'm just trying to get more opins.

As for suspension and things to hook the Glide on the transbrake should help a lil, but I do have tub front, coilovers, lowers, dbl adj uppers, solid bushings, and a anti-roll bar......thats gonna hopefully do untill i get some test n tune under my belt.
 
Not too big at all.

You could always get 205s and if you need more run the 225 program on them. I guess if I had the cake and your goals I'd go straight to 225s. I'd rather have a "too big" head and a smaller cam then have smaller heads and some monster stick that would be a PIA. If you're going to a block with a 4.125 bore and a turbo, why stay at 331, why not a 347 or 364? You must know more about turbo cars then I so you know the advantages of turbos and piston speed....

Adam
 
I think with the boost and the power level you want they would be the way to go:nice:

:OT:Or you can have your TFS CNC ported and they should flow just as well. just a thought:OT:
 
Not too big at all.

You could always get 205s and if you need more run the 225 program on them. I guess if I had the cake and your goals I'd go straight to 225s. I'd rather have a "too big" head and a smaller cam then have smaller heads and some monster stick that would be a PIA. If you're going to a block with a 4.125 bore and a turbo, why stay at 331, why not a 347 or 364? You must know more about turbo cars then I so you know the advantages of turbos and piston speed....

Adam

The car wouldnt be a 331 on a 4.125 I was talking later down the line...using what I have for now why I'm staying 331.

Decided I'm gonna try and push the lil TFS heads and see what happens
 
Enough boost can get you your goals, but as you know, a bigger head will get you there faster, pun intended:)

The more stroke, the more piston speed, the faster you spool, as you know. But for boosted applications and pushing that much power, you would want your piston rings further down, then what a short piston (goes with more stroke) might give you. It cuts down on heat to the piston rings.

AFR 225's would be great, but that is a lot of dough...

I'm sure those Trickflow heads can do the 'trick' later on though:nice:

Good Luck.