Hello every one.
I have 2 questions im looking to pick everyones brains about.
Number 1:
Does anyone play around with different brands of spark plugs. Im not talking about using iridium style plugs either.
For instance the factory recommended plug for the 09 beta evo is an NGK BR7ES.
Has anyone tried an E3, AcDelco, ECT. of same temp?
Number 2:
Can a spark plug cause a sound similar to a piston knock?