Well by older I meant lower compression, as in most people like to over cam there low compression stock motor, so built in advance would help DCR. So if you are building a higher compression engine you can remove that advance, and that should help.
I completely disagree. I would never in a million years purposely retard a camshaft.......unless it needed retarding to reach where the cam card said it is supposed to be installed. That's the stupidest thing I ever heard.