On 11/12/03 12:25, Ted Wetzel said...
I don't quite agree with this analogy. 87 and
93 octane are proven to perform differently in
their intended application. A simple dyno test
will show the difference. Try and find any way
to reliably compare the audible difference in
copper.
Well, actually, octane rating reflects a gasoline's retardation of flame spread (propagation). A higher octane gas will reduce engine knock, which is caused by the ignition detonation occuring to fast/too soon, and attempting to drive the piston downward before it passes TDC.
The only reason high-performance engines benefit from high-octane fuel is because it allows for a higher compression ratio. The lowest octane that eliminates knock is adequate; anything higher is wasted. I guess the analogy is not too far off after all.
Larry
www.fineelectricco.com
