Not so much high-horsepower engines, but rather high-compression
engines. Makes a HUGE difference in aircraft reciprocating engines.
Higher compression leads to higher heat buildup in the cylinder and that
can lead to pre-ignition, with seriously detrimental effect on the
engine and the power curve. Higher octane fuels reduce the pre-ignition
problems.
Rick
-------------------------------------------------
Ron Hawkins wrote:
Steve,
So how good is this petrol that avoids detonation? I don't see that idea
catching on... (GD&R)
Ron
100LL (Low Lead -- as in TetraEthyl Lead) is needed to avoid detonation
in high horsepower engines.
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