Corvette tech guru James Berry tackles part 2 of his tune-up series. Learn how to set ignition timing on your Corvette.

1. When enthusiasts set ignition timing, they’re usually referring to base timing, or the timing without any additional advance based upon engine rpm or vacuum.

Advance or retard ignition timing tuning on a built GM Quad 4 W41 2.3L DOHC quick-burn engine Running a 200 shot ZEX nitrous kit in a 1992 Oldsmobile Achieva SCX W41.