@jep I am running the stock mapping still. Considering a replacement ECU with new map etc at some point, but not yet
I have a 2bular QP track exhaust with carbon tips installed to get me on UK tracks. (I now hit 98db in noise tests). Other than that I’ve fitted a harness bar and also replacement seat mounts for the drivers side to make it more comfortable/give me more head room with a helmet on.
So to answer your question - I’ve found the stock engine mapping on track good. You have to keep the engine in the right power band to get the most out of it obviously but I have never felt it lacks power. I drive it in “sport” (after I’ve done a few warm up laps) and do try and rev it out.
I have heard 2nd hand the GT430 mapping is “better” (not just because of the different bhp) but I’ve never had chance to drive a GT430.
Here’s a lap of me at Castle Combe from last year.
https://youtu.be/OQYr151aXec
I have since got a new GoPro + ODB2 reader etc so I can do overlays on track footage this year.
Do you plan on doing track days this year?