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4) Angle plug vs straight plug on World Sportsman IIs with Dynomax headers, either one better for spark plug clearance?
Thanks! :chevy
I don't know about clearance issues, but I have heard that angle plug heads give and extra performance boost due to the plug being closer to the exhaust valve. I don't know if the boost comes from the way the flame travels or from the way that the cylinder swirls.
I have seen in magazines that some headers need clearancing whether or not they are straight or angle plugs. All they do is heat up the spot with a torch and indent the pipe slightly, then they use some of those shorty plugs that are on the market nowadays, to get the clearance that's needed.