Originally Posted by
Hinecken
Page 22 section 34 of the FT manual suggests starting with 20/87 giving a FDR of 6.50:1.
http://www.teamassociated.com/pdf/ca...-preflight.pdf
Question for everyone else, that same page of the manual suggests the starting gearing for a 3300kv motor to be 18/87, which is what the truck comes with, having an FDR of 12.57:1.
A few lines above its says that a 13.5t using the same exact gears would give an FDR of 7.80:1.
Time and again I hear the 3300kv compared to a 13.5t, how on earth could the FDR numbers be WORLDS apart using the same gears?
IIRC the manual is wrong, so I've read on here, do the math yourself to be sure.
I myself have never found a reason to figure out FDR unless comparing vehicles with different tranny ratios. I do the spur/pinion math and go from there, no reason to figure in the tranny as it never changes. Like I said, unless you're comparing different vehicles.