Thanks for the good info. One should remember that these are
distributor advance values, so dynamic timing values for the running
engine would be 2x.
Bob
On Thu, 01 Jun 2000 20:35:09 -0700 Bullwinkle <yd3@nvc.net> writes:
> WKF Woods book Super tuning the XPAG engine lists the advance for
> the DKY4A distributor as as 6.5 degrees at 1000 rpm. The advance
> starts out as 2 1/2 degrees at 500 RPM and advances in a straight
> line to 14 degrees at 2000. At that point the rate of rise
> decreases and a full advance of 15 degrees occurs at 2600 rpm.
> If you know your geometry, plot the following coordinates: (2.5,
> 500) (6.5, 1000) (10.25, 1500) (14, 2000) (14.7, 2500) (15, 2600)
> (15,3000) (15, 4000). You will get bent straight line segments
> with the bends occuring at (14, 2000) and (15, 2600).
>
> For the D2A4, it is difficult to figure out which curve is being
> referenced. It appears it should be (1, 520) (6, 975) (11, 2000)
> (12, 2200) (12, 2500) (12, 3000) (12, 4000)
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