So I went back down the jbeam rabbit hole and made some changes.
We have a new turbo for the 3 cars called the V8 EP turbo ( i6 EP turbo for the hopper ) it is based off the same semi T600 turbo with the engineDef
from the sbr which gave better spooling.
I also added variable Exhaust power which is why it's called the EP turbo.
Also fixed the hopper's turbo name.