Quote:

If you wanted to reduce the likelihood of intake reversion w/ a particular camshaft, would you want to advance it to close the exhaust sooner OR retard it to delay the point where the intake opens?



reducing overlap is usually going to help so advancing or retarding will only show you "trends".
Closing the exhaust sooner is more likely to help reversion problems but without changing overlap it's not going to make much of a difference.
This is for WOT tuning only.

Brian Hafliger