Which Cylinder head?

[Super Bleeder!!]

Pertaining to the question "does a high compression engine generate more exhaust than a low compression version?" The short answer is no. The amount of exhaust given off is merely a function of volume (displacement). Mass going in and out of an engine is relatively constant, if you consider blowby to be minor (and it should be on a fresh engine).

As for the 1g and 2g power differences, the 14b can indeed flow far more air than the t25; its also more efficient at compressing air which simply means it heats the charge less.

E85 is actually 105 motor octane. Octane is merely a measure of how well a fuel can resist knock, so of course its going to have a higher threshold. Another benefit of that particular fuel is you can run a much more aggressive timing map.