The Stovebolt Site Forums The Shop Area The HiPo Shop 383 Herky Jerky @ lower rpm

OK. May have solved this??????????? Well I didn't. BP may have solved it.

Got a BP rep on the line. Explained everything and how I was struggling with AFR and timing needing to be pulled out due to detonation.

He asks if my vac advance is connected. It is. Received engine with it connected.

Should be disconnected. If connected I am adding 10 to 15 degrees of timing on top of sniper program.

So I go home, disconnect, cap, put timing back to where BP wants it on the sniper and take for a drive.

Completely different engine.

Throttle response is now manageable
No detonation
much less bucking at low rpm
Exhaust is significantly quieter through entire rpm band. This is very confusing to me?

Now I have to start playing with it again adding cruise timing for some fuel efficiency.