View Full Version : tour spec timing/rotor/roll out

December 29th, 2014, 11:51 AM
Prepping for crc- I only have 110' track for testing- My Putnam motor is set at 18 on the endbell, it has 12.4 12.6 12.4 on the can and 1568/1572 on the rotor. On my track I am rolling around a 4.10 most days. What changes should I be looking at for this race? same timing more gear? more timing? less rotor/more timing?


Dom Ruggiere
December 30th, 2014, 09:38 PM
depending if the track gains bite... id roll it out 4.40 - 4.50... timing depends on grip...

January 2nd, 2015, 09:08 AM
what exactly does that mean? timing depends on grip?

Dom Ruggiere
January 2nd, 2015, 01:51 PM
high bite tracks can handle more timing

low bite track less timing

October 4th, 2015, 08:36 AM
If the track is 120' straight is there any calculation to figure rollout? Or get close? Or any ft' straightaway for that matter?

October 7th, 2015, 01:13 PM
The rollout mentioned above is probably going to be about right for you. You might be even higher than 4.50 since your track is slightly bigger. General rules of thumbs: More motor windings = more rollout. A 21.5 motor for example would need a lot of rollout, like 5.50". A 3.5 motor for Open Mod would be 2.00" or less. Blinky classes tend to benefit from stronger gauss ratings on the rotor.

I have not heard of anyone using the length of the straights in their math to help calculate the rollout.