So, you have 9.0 compression. I noticed that on Turbo-kits.com that they offer a built bottom end with CR ranging from 8.6, 9.2, 10.5 and 11.5. Being that I only want 600whp, would you recommend the 9.2 CR over the 8.6 CR so that it will make more power at a lower PSI level due to slightly higher compression?

 

gracias

 

this is just my opinion, but i would def go with the 9.2:1 ratio... 8.6:1 is fine and will work well, but with the head gaskets and head stud upgrades that we have available, there's no need for lower compression pistons... also, lower boost = more aggressive timing...

 

Ive got 8.5 CP pistons and am making very good power with such a low CR. I think such a small jump in CR is negotiable in power gains. Never hurts to do 9.0 tho.

 

look, i've told you that your 120rwhp just doesn't stack up...

and buy a damned premiere membership, already! you need a signature...

 

+1...no human being can tell the difference between 9.0:1 and 8.5:1...maybe a 1% power difference....if that.

 

i'm not human.. i am mutant .. and my son is half mutant

 

-1 just because...

oh, don't forget my quote!

 

I dont support comunism!

 

with a lower compresion ratio, you should be able to run more boost/timing than a comparable, yet higher comp.ratio setup ...........all on pump gas.......

If you are on race gas, the higher comp.ratio setup will make more power...more than likely.

 

I have that exact shortblock from SFR with 8.6 compression with about the same setup as this. They seem about the same...

 

What about tunning the two different CRs though?

 

if you want a good Dj shop in the area.. hit up arthur at Dynolab. hes actually right up the street from sharif. pm me if you want directions.. all my old supra/300zx/hybrid/rx7 friends used to go up there. no 4wd dyno though.. i guess not everyone plans on building up some sick gtr's right Sharif?

 

you read my mind. Arthur is a nice guy, and we use his Dyno for indepedent DJ power test numbers, from time to time.

 

hopefully soon ill be reading your nice big reciept... soon as my supra sells.