Baseline was 314, so we knew right out of the gate that the final number would be impressive. The difference is attributed to UpRev and probably the finest Z tuner in Southern Cali.
The baselines you're reporting for the Nismos are bone stock and I don't know the extent of your mods. Even with identical mods on the same dyno in the same weather, I've seen differences of 3,4,5 whp. Every car will be different. In my case I'm just pretty lucky that the car responded well to my combo and the tune optimized the output.
To keep this thread on topic, I'm sure the FI is playing a huge role in my gains. The Nismo exhaust is advertised as "high flow" but I don't really buy it. I discovered what high flow was when I opened the throttle with the FI for the first time!
