FW Motors and Snail Performance - DYNO DAY!!
05-13-2015, 05:03 PM
#76
Call me Pebbles
iTrader: (11)
Join Date: Nov 2011
Location: I do all my own physics.
Posts: 5,908
Car Info: Moist
So this is just from a basic understanding of physics and a dyno. That said, I'll throw my opinion out there. If its coupled then the 2 driven wheels will be responsible for the rotational mass of 4 rollers and the non-driven wheels, each step further from the driven wheels has an increased moment of inertia, so more kinetic energy from the driven wheels (source: torque from motor) will be required to increase the angular momentum of the rollers. This would require more torque to accomplish the same job resulting in a lowered reading. That doesn't take into account how the dyno is setup and how the software/dyno accounts for load etc. I'm sure the software could be written to properly accommodate the differences but with the same software I don't see it as possible, without uncoupling or mechanic adjustments. There's a reason you can set the dyno up differently and a reason people use the appropriate setups; and I don't believe it's just for the fun of it. Also, if there are flaws in my explanation please correct them....something I doubt I needed to ask for on a forum
