First off, you do not want to use a turbo sized for a motorcycle, too small.
Now a days ,turbos can spool almost as fast as you want to.
Selecting the correct turbine housing, ball bearing center sections all affect turbo spool up time.
Reason factory cars run about 8.25- 8.5 to 1 compression is because it is made for the general public. The intercoolers are all too small, turbine housings ,too small, all add up to higher intake temps. which in turn you need to keep your boost lower.
My Syclone pick up truck ran 14 lbs of boost pressure stock. 8.3 to 1 approx.
I now can run 22-24 psi boost pressure w/the help of methanol injection. Aquamist 1S system.
Best thing you can add (Methanol injection) to your turbo application to supress detonation & up the boost period!
People are leaning towards 9 to 1 compression lately.
If you get the correct combination you can run 8.5 to 9.0 to 1 compression & run anywhere from 12 - 26 lbs of boost pressure on 91-93 octane gas
w/added methanol injection, no problem.
MBHD
