Civinfo Hobbyist Trader
Car: 2009 Championship White FN2
Join Date: 17th January 2010
Thanked 1,528 Times in 1,107 Posts
Re: modifications being made on saturday
Decat upsets the fuelling so it's not good to run it like this long term. A week you'd get away with, without much of a problem except for the engine management light coming on.
The larger throttle body and RRC might cause you issues with the throttle being lumpy coming on and off the throttle, generally wouldn't be as smooth as OEM until it's remapped.
However the killer is the JDM cams. Profile is different from FN2 cams, the ECU won't know how to run them and they need to be mapped.
If you could get a base map for the time being it would see you a week as a stop gap, but I really wouldn't run FD2 cams on a stock car for any length of time.