I have an NA with the Ashspec chip, actually I own the car that the chip was created with. Eitherway it makes a night/day difference. For instance around 4k rpm the stock ECU at WOT has about 30 degrees of timing, the JWT chip is around 32 and Ash and I stopped at 38 degrees for safety and the gains dropped dramitically after 38 degrees, we never got any detonation and none to date. We did see about a 15 HP difference between the Ashspec chip and the JWT chip. Also the Ashspec chip will pass Emissions tests and it has been proven, talk with Ash about those details, also the chip allows for better gas mileage if your foot allows it to run economical. The Ashspec chip allows me when i dont push the car to squeeze about 320-330 miles till the gas light comes on where as the stock set up only allowed me about 260-270 before the light came on.
Here is the Ashspec chip
Here is the JWT chip
Kai 14.765 @ 92.22m.p.h. #4 in 2002 on Z32racing.com in NA drags (206.4 RWHP)
14.765 @ 92.22m.p.h. #4 in 2002 on Z32racing.com in NA drags (206.4 RWHP)
dyno results for the Ashspec - 
