"Sweet Spot"

[Mark Wilcutts]

'course if you did this the magnitude of the peak pressure would
necessarily be lower...


On Fri, 18 Jun 1999, Eric Aos wrote:

> > If you set up a series of tests such that the only thing that 
> > varied was the
> > spark advance,  and you moved it such that the pressure peak 
> > varied from 10 to
> > 20 degrees atdc
> 
> Just imagine for a moment though if you could change that to 73 degrees
> (for a 350 Chevy 3.48 stroke, and 5.7 rod) this is where leverage is
> maximum (90 deg between rod, and crank throw). For a 228% increase in
> leverage... 
>