Yep, I use the book numbers as a guideline, if my motor is stock or close to it, and the book says 10BDC, then I set it to that, then adjust for fastest idle from that point. The book tells me where I should be fairly close to optimal. Now where is that blower?? :) ----- Original Message ----- From: "hugh hemphill" <hugtrees@xxxxxxxx> > In addition, I once tried to set the timing on the car "by the book" and it > was a disaster. I know that others, whose opinion I respect very highly,