MyE28.com

You may consider a new thread Brian.

What turbo cam is it that you have? How do you know it isn't stock? I'd consider it if you are replacing the headgasket anyway. It's a fair amount of time to remove a cam, so if you were paying somebody to do it, consider that cost and decide if it is worth it.

Does the M30b34 need head work anyway?

Hello tschultz;

I may consider a new thread yes and I thank you.

I will answer your questions with the hope of gaining any insight.

I have installed a CAT cam with a turbo profile. Duration @ 1 mm is 294 degrees for intake and 273 degrees for exhaust.

The HG is not part of the equation for swapping the two heads.

I will reduce the compression ratio with the B35 head over the B34 head.
CR for US M30 b34 with b35 head
CR 7.45 :1

Cheers;

Brian

mintus wrote:
I may consider a new thread yes and I thank you.


Cheers;

Brian

Please do. This would be common courtesy of others.