Not very scientific, but I started her up and let her warm up and checked the tach and it read 1000. Shut her down and replaced the stock plugs with Brents NGK IX Iridium and started her up and the tach now reads 1150.
Just went out yesterday for the first time and really took it easy but a couple of spots I was able to get on it and she flew. Did the freak this winter and re-jeted with shims so I can not say the improvement in performance is due to the plugs.
