What are your A/F ratios? I feel you on the timing. Our stock ecu pulls way to much of it.
How were you able to run 20 lbs of boost? When we get around 17.5 plus, we hit the fuel cut like a $hit brickhouse! One car nearly jumped off of the dyno.
Do you have a fuel cut defencer?
Shoot man, as long as your A/F's are good...keep on pouring on the boost...that is how you beat the stock ecu and it's timing bull**** if you do not have pems...but watch those ratios, and listen for those pings!
You have the advantage of being able to add and remove fuel too. that is an added plus.
Good luck, and keep us posted!