well I have a gsr bottom with an itr top. In the process of getting sleeved stock bore.

what c/r ratio should i go with I was thinking stock 10:1 which would be 9.7:1 because of the itr head

What should I go with??

I am still debating on the sc61 or sc63, I think I am gonna go with the 63,

I am shooting for 500whp

Thanks

 

i think the sc61 will be perfect for u. i'd stick with like a 9:1c/r if u plan on running that much hp. with a sc61 you'll need to run about 22psi. that should get you a little over 500whp, with a better spool up then the sc63.

 

so sc 61 running 9:1?

I dont know that seems low

 

i would vote for compressions between 9.5 - 10.0:1

 

I'll be running between 9:1 and 9.5:1, but with 35psi SC61.

art

 

9.8 to 1 CP pistons here and a SC61

hoping for 500 around 22-24psi

 

at 24psi with 9.8:1 compression, you'll be nicely over 500. Art had a guy who ran 24psi on 9:1 compression and made 530whp. thats why i said for his hp goals, 9:1 is safe, and he'll still make his goals. but i guess you could run higher c/r and less boost, theres just less of a margin in error for tuning then. all depends how good your tuner is also.

 

i think, i'm gonna go with 9.7:1 some cp pistons.

Should i keep stock bore or go 84mm, or maybe something custom in between

 

i say 83mm...that way, if something gets messed up u can rebore your cylinders and reuse your block..

 

you still suck

 

i suck?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Arturbo &raquo;</TD></TR><TR><TD CLASS="quote">I'll be running between 9:1 and 9.5:1, but with 35psi SC61.

art</TD></TR></TABLE>

what kind of power should that yield? is this in your street car, set up?

 

bump

 

10.1 cr or so