Update:Finally bought my new tach,Fromec TNC.My engine from post 3 was running at 7696 WOT,best that i got out of it.After this i richened it up a hair so its at a steady 74-7500.Idle is 18-1900.An apc17x8 is what im using.Its a stock ch ign with no advance set at 26-28 BTDC,dont remember exactly.Transition was very good.Bought this off of ebay for less than 50.00 already converted so i dont know anything about it except it was used.It did not come with the ch ign.Now i need to go buy an airplane.