Vacuum Advance and why to use it on the street

[Salvatore]

have a stock distributor in my Z/28. Has been curved and VA locked out. Never had pre-ignition, pinging or glowing headers. Run 12 degrees at idle and around 36 at 2,800 rpm's. I run 112 Sunoco mixed with 93 BUT really don't need it. Ran 93 octane for about 10 years with a lead additive but that is not the reason I run the 112 mix now. Kinda run my carb on the rich side if that matters. Its more of a winter setup which IMO is a little safer but that could be old style thinking. Thanks for posting Paul.