Originally Posted by
HarKonnenD
I switched back to 20% instead of 30% as I saw no huge difference in power. The JLR isn't a difficult engine - it's probably guys who just don't know how to tune properly.
TK- Think I have to remove a shim? It says on the manual it is set for 20%-25%.
If you are satisfied with the bottom end power then leave it the way it is, but I suggest you remove one 0.2mm shim if running 20%.