I've got a cav 1.8 8v with k & n but no chip. I've noticed when the fuel gets down to red line it pulls a lot better.. i know they'll be some difference due to weight loss of fuel but it's very noticable. Is this just a pressure thingy or would it point at some sort of fuelling problem?
Also I've got the K&N 57i but not chipped or cammed as was waiting for exhaust first - .. would it make much of a diff superchipping..? ta.