What/how does compression ratio affect an engine?

"Matt Whiting" wrote in message
...
... Some believe that higher octane gasoline burns more slowly and thus
can
put more fire past the exhaust valve. However, most of my reading on the
subject suggests that this is a myth and there is no substantial
difference in burn rate as a function of octane.

Matt

Burn rates are essentially the same.

There are problems (in automobiles) with some premium auto fuels since the
changes in the chemistry to get higher octane can result in slower
evaporation which can cause an engine to stumble when you first step on the
gas.

--
Geoff
The Sea Hawk at Wow Way d0t Com
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