Ignition timing for 1987 Chevy Corvette?

You can't give a single ignition timing number for a 1987 Chevy Corvette. The timing is computer-controlled and varies depending on engine load, speed, and other factors. There's no single "set it and forget it" value like older, distributor-equipped cars.

To check the ignition timing on an '87 Corvette, you'll need a scan tool capable of reading the engine's computer data (like a code reader that shows live data). Even then, you won't see a single timing number, but rather a constantly changing value.

Trying to adjust the timing manually on a 1987 Corvette's computer-controlled ignition system is strongly discouraged. You'll likely damage the engine or the computer. If you suspect a timing issue, the best approach is to take it to a mechanic specializing in older Corvettes or someone with experience working on these computer-controlled systems. They'll have the proper diagnostic tools and knowledge to identify and fix the problem.