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Don't forget that the reason for the turbo on the 2-1/2 ton multifuel was to eliminate the smoke, not for increasing power, but some power increase just couldn't be avoided, he he he.

DJ, still don't see how you can drive with the engine at only 140F, I wouldn't leave the yard unless it's 175 or so.... My turbo is very responsive, the boost pops up to 11-12 psi very quickly in the hills, even small ones. My fuel has not been turned up, but the smoke cam angle is still set...

Doc: Was hoping you would share the method of calculation/formula(s) for the efficiency bit. DJ: You need a radiator grill cover! Keep your engine op temp at 180 or so. I have never measured the charge air temp. Looked at the intake manifold and it's double walled for coolant circulation in...

So, doc, what kind of numbers do you need to calculate the efficiency for a particular run? I have fairly good data for distances traveled with fuel consumed, average speed, EGT, boost, ambient and engine temps and total vehicle weight. Thanks,