AJ I like your insight.
My iron head 340 roller engine is all in 36* at 2500rpm the vacuum advance adds 10* for a total of 46* at cruz speed. I have tried to add more but am limited by 10 inches of vacuum and the advance adjustment is maxed out. Connected to full manifold vacuum.
I have made numerous 6000rpm+ pulls on the road with no issues. I dont know what it would do at 50*+, lets not find out.
Keep up the good posts
