ORIGINAL: thevirginian
Hey, guys. I had a little mishap over the weekend. While flying my 35% WH Sukhoi the motor came loose and rubbed against the baffle inside the cowl. Consequently the little linkage snapped off that connects the mechanical ignition advance ring with the bellcrank linked to the carb. I managed to fabricate a new one at the field, but had no idea what the exact length of that linkage was. After guessing the length the motor fired back up and ran fairly well. Was easy to start and transition was instantaneous. So was idle. But WOT I only could get 6100 with a Evolution 26x10. Anybody know how long that linkage needs to be? Any input is greatly appreciated.
To get the timing right you are going to have to time it like it was new. You will have to find TDC and then adjust the timing link length for 28 degrees total ignition advance at full throttle. This is the only way to get it right, anything else is just a guess.