B&M SHIFT PLUS
I hear from a lot of people that the only good thing B&M makes is the tranny cooler. I would go with a good shift kit like a TCI or Transgo over a device that just boosts line pressure.
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FYI - I can tell you how to electronically boost line pressure with a $2 switch and a few $0.50 resistors from radio shack. no need to buy a $40 b&m part. PM Me
Any programmer (and the Shifter Plus) will give firmer part throttle shifts but not firmer WOT shifts. The line pressure is programmed at 100% at WOT when stock.

Ragtop, I've played with LS1Edit a little bit and also the HPP3 ALOT (back in those dark days) and I've been able to tell no increase in WOT shift firmness. I think the max line pressure is being mechanically limited.
Just my observations and theory. I could be wrong but not by much if I am.
Just my observations and theory. I could be wrong but not by much if I am.
HELL IM NO EXPERT BUT I CAN SURE TELL MINE SHIFTS DIFFERENT AT WOT AND P\T BUT ACTUALLY MINE SHIFTS KINDA SMOOTH AT P\T AND MORE AGRESSIVELY AT WOT I HAVE MY HPP3 SET TO 100% FIRMNESS AND AM NOT LOOKING BACK IT WORKS GREAT AND I BELIVE THAT LOW THRODDLE SHIFTS ARE JUST ABOUT AS LOOSE AS STOCK WHILE HIGHER RPM SHIFTS ARE MUCH MORE PERSICE... SO I GUESS IM SAYING IT WORKS FOR ME THE WAY THEY SAID IT WOULD, BUT EVENTUALLY IM GONNA DO AT LEATS A TRANS GO KIT AND T\C BUT IM PRITTY SURE ILL HAVE TO GO FURTHER IF IM EVER GONNA REACH MY 600 RWHP GOAL


