Hi just about to build up a fresh engine for my sapph and in the long run will be runnig light blues i was wandering what compression ratio i need to run so i can get the pistons machined to suit and what turbo to go for ie a t34 with a .48 or .63 housing or other

 

Use the .63 housing and go for a t34 hybriad

 

T34 .63 and 4x4 pistons with 2wd head will give you 7.8:1 which should be ifne mate, stand compression should be fine too, but get propper adivce from the person who will be mapping your car!!