Can somebody tell me the difference between the dyna tc88-1 and the tc88-2 ignition. It seems like some forums have some good to say about this ignition and rate it as good as the crane. Others say it causes more problems and looses power. One guy said that it produced good power but the performance harley module produced a bit more. The difference was the dyna module produced smoother power. So I don't know. Yes the twin tec, HQ, Zippers Module is a leep forward for ignitions. But does a street machine with 9.5:1 compression and a tw37 need the twin tec?