Originally posted by Paul
Then where did Honda come up with 12 extra horses from the A1 to the B1?
The difference was only 2 horsepower from the 140hp 92-93 B18A1 to the 142hp 94-95 B18B1. A slight change in fuel maps will easily give 2 flywheel (about 1.5 wheel) horsepower. A slight cam profile change will give similar results.