You really need to upgrade the firmware to the new 1.1.9x version - the acceleration enrichment and accel retard functions will really make your response improve.
Yes, it is about time to upgrade the firmware.
I haven't drove my car since my last competition 12 months ago, I managed to temp. solve the FETs problem by using VNP5N07. But it failed again yesterday when I decided to hold the rev limit at 8500rpm 3rd gear for 10sec.....
So, I have ordered IRF640N to give it another go... Finger crossed and I am not giving it up yet!