Best be limiting the vacuum advance + mechanical, keep the total with the 3 amigo's all in to below approx 48 btdc no matter how you mix them up.
Most stock vacuum adv cans will add 16-20 deg advance, remember this shifts up with the initial everytime, it does not care where you limit the mechanical advance. If you have a initial @ 20 then your are going to get up to 56 btdc total when you add in stock 16-20 deg vacuum adv. (20initial+16mech+20vac)
You need to limit mech and vacuum advance
It would not surprise me if this cam liked 36 degrees at idle with 24 initial, so vacuum advance at 12 deg max + 12 deg max mechanical.
PS IMO If the compression ratio of the motor is not at least 10:1+ it wont matter how much you monkey with the timing, its going to load itself silly until its at WOT, thumpa thumpa thumpa
Last edited by Custom10; 11-18-2011 at 09:43 PM.