Rapid Robert:

OK, so 15* initial in my above scenario at idle because of ported vacuum...so then how much after the springs allowed full movement, say a total of 35*, using my previous post. So how much more total would be added by the vacuum can at high ported cruise vacuum?


The reason I am asking, is for me to understand how to fine tune my my Holley Dominator ECU spark tables. See what I am getting at?


Thank you, Mark