Originally Posted by bertrandsv87
There are torque(very low kv) motors, and there are Rpm(high kv) motors... Low kv motor gearing should be around 3.0 to 3.2 fdr , and high kv motors are around 4.0 to 4.2fdr... Low kv motors like low timing(30 degrees), high kv motors like high timing(55+ degrees).... Once you identify the kind of motor you have, gear accordingly or else poof....
I would never gear lower than 3.5 and this is outdoors with quite a long strait.
The usual gearing for 17.5 TC is between 4.1 and 3.8.
The timing and gearing need to be set to suit the track layout.
I.E. shorter gearing/ lower timing for tight tracks and the opposite for large flowing tracks. The settings depending on your driving style too.
Therefore start with the gearing I mentioned and about 40* timing and adjust from there.
I hope I could help.