Originally Posted by
MikeFriery
msave- I assume you are asking for your b4? I've been doing a lot of testing with gearing and 13.5's lately
I'm geared 31/69 in a durango 210
69/31*2.6 for around 5.79 FDR . Track is 110 x 70, outdoor, ambient temps of around 65-75 degrees. Motor never temps higher than 140. (10 minute mains)
I would definitely start with a higher ratio and work your way down based on temps.
Yes Mike it is for the b4. I ran 72/34 at Midwest in 17.5 but been trying setups for 13.5. Was on a 72/28 but when I put on the 75 seemed a bit more responsive. Few guys running 13.5 there are running 75/28. My temps actually went down to 90-95 from 100-110 with the 75 spur on.