Max Advance

[Jeff Bromberger]

According the Reher-Morrison's (pro stock engine builders) research, maximum
power is made when maximum cylinder pressure occurs at 10-20 degrees ATDC...
on their motors (500ci big blocks) this takes between 30-40 degrees of
advance to achieve... just another data point...

>
> Well, it's not quite so simple.  What you really want to do is
> maximize the integral of the PQ curve (see my mail from 10 minutes
> ago), however you can.  After running a couple of thought simulations
> using the old meat computer, I think this means that you _probably_
> want the pressure in the cylinder at maximum when the rod-to-crank
> angle is about 90d for engines with big L (rod/stroke ratio), but
> probably a little earlier in the stroke as L gets smaller.


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