Im not trying to discourage you but if you already have a JWT ECU the difference in performance on an NA isn't going to be that much with switching to the ZEM. Ash runs a little bit leaner than JWT but at your power levels thats not going to be a big difference, esp. not $600-700
Just my .02
Madhatter10-6: 1991 Twin Turbo
"The government will always find a marvelous reason for taking your liberty away from you."