Maximum advance

[Axel Rietschin]

> What is the maximum advance that is safe for a 4 cylinder engine?

Very hard to tell as it depends on many thing, like compression ratio, fuel
octane rating, air temperature, combustion chamber shape, bore diameter,
location of the spark plug, engine cooling, just to name a few.

I believe there is no universal "formula", the answer will be different for
every engine so you have to find out by experimentation, but be *very*
careful, it can quickly become costly :-)

Above all, remember you absolutely, definitely can't hear high speed knock
*at all* from inside the car. Said high speed knock could destroy your
engine in a matter of seconds.

Good luck,
Axel
400hp Cosworth YBT
Two sets of melted pistons to back his claims ;-)




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