whats the best a/r to run

[fatherbubble]

what do you think the spool range will be on a T4 60 trim with a .81 a/r?

is that ok for street and strip or does it have too much top end for the street?

 

[1gslotsi]

spool range will vary due to mods have you used the search button and actual turbo p/n could be helpful

 

[LandSpeed-DSM]

Need more info on your setup as well as the wheel specs on the turbo.

Is this an open or divided T4?

When discussing "spool" another big factor is what your target boost will be.