A blow thru will get rid of the stall 100%, like stated get a slot style sensor. I have personally see a HPX meter make 870 counts with 940rwhp through a TT set up with a auto. I have a BA5000 on my race car and with no MAFIA and a 3.5" piping pegged at 1058rwhp. No need for MAFIA's when you have great sensors that are avail now.