Jam,
Yeah, I hear ya on the % of loss.
The motor dyno was without sidepipes.
The chassis dyno is as the car runs on the street, that is I have not tried to get the maximum out of it on the chassis dyno. I have the car a little more rich than the motor dyno, I retarded the timing slightly, the sidepipes are on (of course), IRS rear end, 3550 tremac, and I did not inflate the tires from their normal 20 psi.
So I don't know. Maybe I should try for maximum run?
Eric