what should a s4 normal aspirated motor read for good compression? If anyone konws wht should it be for a TII just out of curiosity. Thanx

 

me too i would like to know ..for turbo please

 

maybe you should read the thread that says read this before posting.
The FSM is available for free download and it will tell you.
Off the top of my head I'd say anything >100 would be fine.

 

most n/a's i see have around 110 psi and most turbos have around 100 but it is all relative to ambient conditions and the compression tester. i try not to rely on compression testers for these engines as they can give you false readings unless you are familiar with how your compression tester reacts on a worn and a good compression motor.

obviously a motor with all new internals and rotor housings may have slightly higher numbers but again it depends on the compression guage, anything under 85psi is usually considered in the rebuild area as that is where flooding issues begin to develop.

 

i can vouche for that ^^
i have on that's compressing at 75 and it takes about 20+ mins to get it started LoL.. there is no flooding/unflooding/starting... it's more like HOLY **** IT STARTED..