Putting a load on your engine will make the turbo to spool up sooner.

Having low gears like 4.10's will cause the turbo to spool up slower, & gets boost later in the later RPM range. Especially in first gear.

Is your application for a turbo or?

Just on average, typical street/strip cars run 3.55s -3.30's, also depending on tire OD.

MBHD

12 port SDS EFI