1989 300SE upgrades?
what about swapping a OD auto tranny into it? current tranny's the 3 spd non-OD dog.
turbos/superchargers?
In 4th gear the speed should be 1/2 of the RPMs.
There are twin turbo kits around, not sure if they are still available or if they don't cause damage to the engine. Go find some octane booster and put 93 octane in the tank, it makes it a bit peppier.



