[quote=gbauerI'm only about 6 degrees advanced at idle. When I'm cruising along and give it about 3/4 throttle I get pinging. I don't have a tach but I'd guess it to be about 2,500 to 3,500 RPM's when it happens. If I floor it the pinging goes away. Also getting some dieseling when it's hot.
Basically I think I'm getting too much vac advance. How would I fix that? (not the best, I know...)
Thoughts? I've never done this or even seen it done so a little hand holding would be appreciated. [/quote]
You can install an adjustable vacuum can if yours did not come with one. https://www.google.com/search?q=adjustab...mp;ved=0CFkQsAQ Question, what octane fuel are you using? If it is 87 or less, I do not think the engine was designed to run on low octane we have nowadays.
What was the lowest octane available in 1968?
You can swap where your vacuum advance hose is hooked up. Port vacuum or direct vacuum, just to try it out.
Dieseling, throttle blades open too far, idle too high? What RPM does the engine idle at in gear & out of gear?
