Comments on: Transmission dynos http://www.ret-monitor.com/articles/1977/transmission-dynos/ Specific mission-critical info for professionals Fri, 18 May 2012 09:24:19 +0000 http://wordpress.org/?v=2.7.1 hourly 1 By: Terry http://www.ret-monitor.com/articles/1977/transmission-dynos/comment-page-1/#comment-9848 Terry Sat, 17 Dec 2011 02:11:57 +0000 http://www.ret-monitor.com/articles/1977/transmission-dynos/#comment-9848 While it's a bit off-topic, one way that I'd suggest for reducing drivetrain losses in NASCAR would be to switch from a hypoid final drive gearset to a face gear final drive. The face gear final drive would be much lighter and more efficient (maybe by 0.50% or more). A face gear final drive would also be much easier to set up than a hypoid gear set. While the dedicated transmission dyno described can establish operating efficiency under some conditions, there are other important effects it likely does not simulate. The power transfer efficiency of a gear set can be greatly influenced by even very minute mesh line displacements. So unless the dyno can simulate the complete structural load and displacement effects in the gear housing experienced during a race, due to cornering, braking or accelerating, then it still has room for improvement. While it’s a bit off-topic, one way that I’d suggest for reducing drivetrain losses in NASCAR would be to switch from a hypoid final drive gearset to a face gear final drive. The face gear final drive would be much lighter and more efficient (maybe by 0.50% or more). A face gear final drive would also be much easier to set up than a hypoid gear set.

While the dedicated transmission dyno described can establish operating efficiency under some conditions, there are other important effects it likely does not simulate. The power transfer efficiency of a gear set can be greatly influenced by even very minute mesh line displacements. So unless the dyno can simulate the complete structural load and displacement effects in the gear housing experienced during a race, due to cornering, braking or accelerating, then it still has room for improvement.

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