kuskoal
Full Access Member
Double OD is a huge parasitic loss, though. Turning all the gears through 2 or 3 transmissions is a nice drag on the engine at speed.
OTR trucks use about a 3.55 if memory serves right. If 1:1 is the most efficient gear, why not underdrive the whole geartrain and run somewhere in the higher gear sets and an old-school crashbox? So 3.55 and 35" with a very nice gear spread and ending at 1:1 nets 2200 rpm at 65 mph. Sound right?
OTR trucks use about a 3.55 if memory serves right. If 1:1 is the most efficient gear, why not underdrive the whole geartrain and run somewhere in the higher gear sets and an old-school crashbox? So 3.55 and 35" with a very nice gear spread and ending at 1:1 nets 2200 rpm at 65 mph. Sound right?