928Tom

1978 US Auto. 928 classics PDF says to turn screw all the way counterclockwise and then go clockwise until you hear injectors engage and then go back 1/8 turn counterclockwise. My question is what constitutes the point where I stop and go counterclockwise 1/8? I hear two sounds - a quiet hiss and then the full Scream/squeal sound. There is a point where the injectors start to scream, but further counterclockwise for at least a whole turn, I still hear a soft hiss. Is the correct setting 1/8 turn back from full (loud) injector spraying or is it 1/8 from when I can no longer hear anything?

streetsnake

Those directions were a bit too subjective for me as well. If I can find my setup instructions from Flowtech, I’ll shoot you a message. Gauges, as I’m sure will be recommended, are good to have.