Originally Posted by
Chaz955i
Good question. I've had little luck with my Sonic. Very smooth but running timing the temps climb very fast 180+ and that is running a 4.0 FDR in blinky. For comparison my Duo 1 running in the middle timing position normally comes off around 157 and is considerably stronger all the way through. Other guys at the track are pulling a taller gear with the Sonic with more timing and coming off cooler so not sure if something is wrong with mine or I'm just approaching it completely wrong. It sure is smooth but is not near as fast as my old Duo.
On the same track as Chaz955i, with my Sonic 17.5, I've been running around 145 - 165 degrees with an FDR of 3.8, depending on layout. I used to run with the timing advanced all the way, but backed off a bit it runs cooler with no loss of speed. I do run a fan blowing directly on the motor.