which is better for a turbo d16z6 daily driven 275hp range. which is better at lower boost?

 

technically the higher the compression the more power you are going to get...althogh it's not enough to justify this for a turbed car because the lower the compression the the easier and more forgiving the tune and or gas can be.

There's not too much of a difference between 8.5 and 9.0 in terms of power, but the safety will be increased with a 8.5 moter. There's a lot of debate on what to do, but to be honest...it's not a big differnece in safety or power, so I'd go with whatever is cheaper

 

Wiseco 9.1 is your best bet