highest ron possible is always best, even unmapped 99 ron is best for them. AFR wise 11:1 on boost is ideal, no need for that amount of fuel when not on boost hence it gets wound back a bit.
Mine on a 2.5 below
Hi guys,
came across this site by accident when searching on google so thought i'd say hello.
Current car is a Volvo V50, my other one is currently parked up at scoobyclinic awaiting removal of the engine with a rattly crank. Not ideal lol