[peteb]

I need some help on my newly build 383. It pings from 2 until 12 deg with and without the vacuum adv. What did I do wrong?

 

[richard stewart 3rd]

Hi :welcome:
Welcome to HotRodders.com

It's a little hard to tell what is wrong with the information given,
tell all that has bin done & what you have for parts, heads, cam, etc.
& we can go from there.
Rich

 

[riceharvester]

I need some help on my newly build 383. It pings from 2 until 12 deg with and without the vacuum adv. What did I do wrong?

What compression are you running?