Maximum advance

[Jeff Bromberger]

i agree in theory.. but why don't we see race teams running 0 degrees of
timing and 75 octane gas... with the much lower octane the burn rate will
increase and you should reach your peak cyl pressure around 10 degrees after
tdc... conversely, if you run 118 octane and have 35 degrees of advance
you'll still hit peak pressure at the same crank angle... (numbers are
arbitrary, but i'm asking the general question, why do people go towards
more advance and slower burn vs. the opposite?)...



> More isn't better.  The more advance you have, the more the piston is
> working against rising cylinder pressure on the upstroke.  What you want
> is a peak cylinder pressure at a particular point in the downstroke that
> provides the best leverage on the crank.  No more, no less.  If you
> could somehow accomplish that with zero advance, you'd have the best of
> all worlds.
>


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