Re: Pre and post turbo injection in an audi b5 s4
I have tried precompression injection with a Rotrex C30-74. I took pictures of the turbine wheel before and after some use and could not spot a single difference except the blades looked more clean.
Powerwise I did not make any feelable difference comparted to direct port injection with similar flow. I injected 300ml/min.
The sound of the supercharger changes a bit. You can hear more of a noise. Intake asir temps drop to ambient using 50/50 water methanol.
The nozzle was positioned about 5" away from the intake that was S-shaped. I positioned in a way it would not pool on a wall.
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