I changed from 20%nitro to 30% and didn't use the extra shim cause the engine is already with very little pinch so it's OK i beleive to use the 30% fuel.BUT the tuning was soooooo difficult,i couldn'ttune it right,the idle was low after WOT and then instead of loading up it was reving higher and after 15sec it was loading up.
It was shutting down after WOT(sometimes) but after changing plugs (P6) the thing went away,at least the shutting down.
Any ideas except of the plug.
Any other plugs i can use on the v-spec except of the P3 and P6?