Hi All   I've been doing my ignition system research and I keep seeing people referring to EST, TFI and electronic distributors. Only thing is no body seems to mention what the difference is or what they look like? (guess its just one of those things people just know)   So My Guestion/s are   Whats an EST dizzy? Whats a TFI Dizzy? Whats an electronic Dizzy? How do you tell the difference?   and if you are really keen what are the pros and cons?? why use one over the other?   Sorry if it's a dumb questions but it's doing my head in and I haven't been able to find an answer on the forum or on the all mighty google   Thank You