Twin Turbos vs. Single Turbo.
There are certain facts and laws of nature that every diesel driver faces. Among these are 1. Ambient (atmosphere) air pressure is approx 14.7 psi at sea level. 2. Turbochargers only function at their best in a limited band of RPM's.
We have received many questions about turbochargers. One being about the groove in the compressor housing (also called the MWE groove, MAP WIDTH enhancement groove), the purpose and effect of changing it.