From http://techdata.mi3si.org/turbocharger.htm ...FlySwat said:Rick seems to think ~450cfm. I PM'ed him before I got it. I havent found a compressor flow map online however.
The 15G is not a factory produced Mitsubishi turbocharger model. A true 15G starts life as a 13G. The center of the compressor housing is bored to fit the very aggressively trimmed and larger 15G compressor wheel. The 15G can flow alot more than a stock turbocharger. A non-ported 15G reportedly flows 404 CFM @ 15 PSI. The 15G is considered a serious modification to the VR4 engine. Attention to the fuel delivery system is a necessity.