Biggsam21 wrote:Stillen offers the chip (VK PRO II). They claim a big increase in proformance?
it is an ok increase. Nissan's throttle bodies are all Drive by Wire now. So even when you floor it the butterfly only opens 75%.What these chips do is program the ECU to open the body fully unter full throttle, and take of the re limiter and speed limiter and that is it. It does give a little power to the car but also harms the vehicle.
Nissan's come with a failsafe mode built in so when they overheat they limit the throttle to 35% or so and it cannot go over 4500rpm among other things. There has not been a documented case yet but I am 50% sure the chip will effect the failsafe mode.