Do you notice much difference
Yes I noticed a difference ~ the car is quicker off the mark in the first few gears which is where I found it most noticeable.
The main thing is though that you know the car will be running correctly on any performance mods you've done. With basic mods like air induction, exhaust and a plenum spacer it's not suddenly going to turn your Zed into a drag strip monster but it will definitely get everything running as it should, give you a more linear torque curve and of course take off the 155mph top speed limiter.
From Horsham Developments (where I had mine done.) http://www.h-dev.co....ge=350z_mapping
No I understand its not going to be a drag car after
But good to here you noticed some difference
Also i like the fact you get a few maps the one for if you can only get low octane would be good as I got stuck with that in Scotland