Project 9.xx MKIV TT Supra

[2jzFUN]

Originally Posted by pwpanas

Just curious - how did you decide on 9.5:1 as your CR? That's really pushing the edge as far as boostability...you'll likely have to run pure (i.e. don't blend with pump gas) VERY high octane race fuel ($$$$$$$$) if you're planning to make a lot of power from your boost.

Before you bolt on your head, consider a thicker-than-oem headgasket to help compensate for this (to me) overly-high CR.

Also, before you bolt on your head, consider modifying your block for 1/2" head studs OR be sure to get L19 studs. Oem-thickness regular ARP studs won't hold 40+ psi of boost.

Nope I have this all figured out for what I want. I am doing e85 all the time so 9.5:1 will work perfect for me all of the time. I will not be using any type of a thicker head gasket or anything and I am doing l19 head studs. And just because I am doing high compression doesnt mean I am running 40+psi. This is going to be a well powered street car where the power band and driveability is more on the lower end and not a rev monster. More updates to follow.