Originally posted by 99blackcivicsi
You have been told that by people that can't read them if you can them properly they are a excellent tool in matching a turbo to your application.
Not really Ronnie! The compressor maps usually say the turbos like my T67 are waaaay too big for my motor and way out of it's efficiency range and will be on the surge line, UMMM NO! They are not that great of a tool anymore really. A guideline but waaaay off IMO.