ISX CM2350 VGT & Brake Table

[schISM]

(12-03-2017 )Moose Wrote:  Boost tops out at 35psi, shaft speeds are less than 120k under full throttle. Exhaust temps max out at 1100F at the k-probe pre-turbo and 1200F calculated. The turbo just seems like it trying to work entirely too hard and the fuel mileage is agreeing. I've got 5psi @ idle with 40k shaft speed 82% VGT, 10PSI at light throttle and then it drops off over 1100rpm. I want to fix this. I've got too much money and time in rebuilding this one. I don't want redneck tuning... I want it not to breathe it's own soot and last beyond 400k miles.

I'll pay more attention to the MCF and operating mode. Plus I can go back and look at the other cals now that I know what to look for.

Just thinking out loud, but it seems to me the turbo is operating exactly as it should utilizing MCF. Before low NoX was common terminology there was no reason to see more than 1000 degrees pre-turbo/800 post. I'd be inclined to look at SOI before messing with the turbo. If its only vectoring to one mode it may still be using a "protection" SOI that is too far retarded allowing your heat to go out the exhaust instead of drive the piston. I know these common rails can't take much timing advance I'm just saying thats where I would start.