Maybe a little misleading, but the honesty about the set- it's up was commendable. "Set-up", properly, and monitored with an EGT (exhaust gas temperature gauge), those numbers might have become a little closer to each other. Just speculation on my part, and it might be true, but I'm wondering.While not a true a to b test.we had a gas motor with a carb we reamed to .640 ,that made 11.4hp. Put a .640 Dover outlaw carb for alcohol.14.4hp.. Our carb building skills need to improve so it is hard to say how much was better cab and how much was fuel
II'm going to hook the egt up on the next motor. I always been under the impression that the sensor had to be in a plate between the head and the pipe to get accurate and consistent data.