[cleanspeed1]

Ok, my brain re engaged; here's some more. When you look at modern engine designs on the gasoline side, you'll hear about high swirl combustion chambers, tumbleports, etc. This is in reference to things designed into cylinder heads to induce motion inside the combustion chamber to help make the fuel / air mixture more reactive, and therefore more complete. In other words, better vaporize everything mechanically so that it reacts more completely. An example of this is the May "Fireball" combustion chamber design that was used on the 5.3L V12 Jaguar engine as installed in the XJS back in the day. This allowed the compression ratio to be raised to 11.5 to 1 on the pump junk we have here, and lowered the fuel consumption quite a bit. Your Acura is another example; when you look at the cylinder head and the piston crown shape, along with the port shape, they all conspire to create a lot of motion in the cylinder, breaking the droplets down even further and making things more homogenous for combustion. This is the reason Hondas run so clean, and can run low octane fuel on a high compression ratio.

The problem with engineering the compression in with the current fuel systems and current fuel chemistries is ( I think ) NOx production as a consequence of higher combustion temps. Now, this is just me, I find it debateable, but who am I. I believe there's a way around everything, just need the time.

Sorry about the segue..........mind drifts. Anyway, the fuel we have is the limiter along with.....oh better stop now before I rant.