Quote Originally Posted by beeza View Post
From your quoted text;

"Having it set to manufacturer specifications on a stock motor will give you the most power and best fuel economy. However once you begin to modify components on the motor, you may need to change the igition timing to extract the power from those units"

and you said;
...I didn't mention I'm runnin' the MSD system...
It would be a mistake to think of your new ignition system as being a 'modification' in the sense meant in the quoted text, that sense implying some significant change in the engines volumetric efficiency (i.e. ability to 'breathe', e.g. cam change and/or porting or supercharging or boost change etc etc etc), and / or an increase or decrease in compression ratio.

With a stock engine (i.e. less than very substantially modified) an 'upgraded' ignition system will have zero affect on performance unless the system it replaced was in some way faulty, and will require no change to the timing.

Really, just set it to the factory spec, or set it on a dyno (shouldn't take long just to do the timing, shouldn't cost much).