hYbRid_Eg6

iTrader: (2)

Ok I have a gsr head that was pnp and it looks like the combustion chamber has been worked on, now I know that a stock cc volume is "about" 41.60cc according to some compression calculator. I'm now trying to get a rough estimate on my compression, since the combustion chamber was worked on and deshouded, what would the cc be? 42cc? I know it's hard to say, I can't get a hold of the company (JG) that did the work, just wondering if anyone cc there head and how much cc was added? Like I said I'm trying to get a "rough estimate", and the head is on the block and I don't want to remove to check.

Using dished valves.

Cynical 1

why not google how to cc a head and do it yourself? that way you know exactly, instead of having someone guess for you?

hYbRid_Eg6

iTrader: (2)

I know, I seen some DIY threads on here, but I got ahead of myself and installed the head already and I don't want to rip it out again.

I just wanted to see if anyone that got a pnp done and if they or there engine builder cc'd the head after the pnp, and what they got.

And I know this is not the way to do things and I understand, just wanted to know what people got.

Cynical 1

i see. i assumed the head was off...

hYbRid_Eg6

iTrader: (2)

No problem. Its my fault that i didnt do my homework first before slapping on my head... My question is, is there a lot of material removed When they work the chamber?

I don't know if you guys can tell by looking at the pic. So at 41.60cc does it go up or down in cc? Head is milled at 0.010






As of now with stock cc of 41.60 and a milled head at 0.010 with the sea level of 102 my CR is at 11:6