heres my problem I already bought arias 8:1 forged pistons from summit. But i was told that having 8:5:1 would be better for my setup. I can return them if i have to, but heres my setup ls vtec with a turbonetics t3/t4 turbo and i plan on boosting 20-25 lbs of boost. Also i have precision 880cc injectors is that going to be enough. Im sending it to get sleeved and i plan on using eagle rods.

 

Honestly a difference of .4 CR in a setup like that isnt going to make a difference that is anywhere near noticeable.

The nice thing about having low compression like that is you are able to get away with a little more in some cases when it comes to detonation.

For the most part most people run in between 9.1-10.1 cr in a lot of boosted applications.

Like i am sure every person has been told, the tune is the deciding factor.

So in my opinion, you are completly 100% ok using those pistons.

 

^^^ W3RD
You'll be safer running the 8.1-1, higher compression will spool the turbo faster, but your not gonna see that with only .4 comp. points. Stick with what you have.

 

thanks guys but will my fuel injectors be big enough?

 

how much power do you want to make? that's the deciding factor in how big you go with the injectors.

 

I want to make 500wph and maybe improve upon it in the future.

 

im running cp 8:5:1 and im happy with it

 

As far as your injectors go you should be fine, usually anything over 750cc's should support over 450whp in most cases...