I use a J&S safegaurd unit to control the timing.
I use methanol injection & the timing removed when it hears detonation, it is not that much, maybe 6 degrees removed , then once it stops it brings the timing right back up.
Never seen it close to 30 degrees of retard to have to stop the detonation.
When I turn up the boost I will sometimes set the J&S so that it will remove timing from all cylinders (safer mode) instead of individually removing timing.
The J&S set-up has saved my cast piston engine more than a few times. 25-26 PSi on crap 91 octane fuel.
MBHD
