5.7 Timing Troubles

Timing reduction for Tip in is normal. Its to prevent knock directly after the trottle snaps open. Generally too much tip in retard won't cause a bog.

Be aware that the stock timing is pretty low near idle and 14psia. Its common for tip-in retard to pull the timing negative.

If you're only gettting 12.5psia at WOT, then your MAP sensor isn't reading right or Kansas has some pretty high mountains that no one knows about. WOT MAP should be very close to ambient pressure (usually between 14.0-14.7). Besides a bad MAP sensor or connection, a restrictive air cleaner/filter can cause a drop in WOT pressure.

For reference, here's an older thread where I posted the stock max WOT timing. http://www.forabodiesonly.com/mopar/showthread.php?t=127947


Do you have any way to measure your A/F?
It would be very interesting to know what your carb is actually doing.