I have had a few issues getting the right sweet spot for my Orion V2 motor's. I contacted Joe Pillars at orion and he was so helpful. I asked him can he help me to find a good FDR for my range of orion's, this was his reply.
As far as FDR's go, it depends allot on the size of the track you are racing on. I can give you a good starting point for 7 and 8 turns. As far as 9-12, Im not too sure since we dont ever run anything that high.
7x1 - 8.4 to 8.8
8x1 - 7.8 to 8.2
Hope this helps,
Team Orion Customer Service/Factory Driver
Now I used this formula and what a difference.
I was running a 8X1 V2 with a Tamiya MRE with a Rollout of 22.422
FDR was 8.827 using a 102/26 with 64 pitch, I used this on a tight fast track thinking it would be good.
I changed using Joe's Formula to a FDR of 7.914 which was on the car 102/29 with 64 pitch and what a difference it made. It was like I found the sweet spot for the 8x1 motor.
I would love to find a way of getting the right formula for all my motor's
How do you guy's use to get the tthe right sweet spot for you motor's?
I know it is all about the size of the track but there has to be a FDR basic for all modified motor's to use as a guide line to set up off.
Have you guy's got any great idea's
Any input would be great.