Hi guys, I plan to convert my hyper 21 turbo engine to run standard plug. Can this be done? I do have SH .21 standard plug head button and the diameter on the selvee is same but the high on the head button is diffrent. I managed to find head shim and leave up the high on the standard plug head button as high as turbo plug head button. So, do the engine will run fine? Or it will hard to tune? Please advice and thanks.
Oh ya, why I want to convert, right? Because I still got lot of standard plug in my tool box
