Originally Posted by cooltoy

I was not referring to sound level of the exhaust, just the amount of backfire I guess. Might be a dumb question, maybe the level for the sound of the backfire and the level of sound of the exhaust are interrelated (directly or inversely).

I have no experience with engines larger then 4 cylinders and have never experienced backfire.

I don't think a phone call is necessary, I am not unhappy, just trying to learn stuff.

Thank you.