# Calling Engineers (turbo idea)

**URL:** <https://forums.speedlife.net/t/calling-engineers-turbo-idea/43168>\
**Category:** NYSpeed Automotive\
**Created:** [February 9, 2008, 7:59am UTC](https://forums.speedlife.net/t/calling-engineers-turbo-idea/43168 "2008-02-09T07:59:07Z")\
**Posts on this page:** 1\
**Showing post:** 52

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**Author:** ![Violator](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/violator/32/7278_2.png) [@Violator](https://forums.speedlife.net/u/Violator)\
**Post date:** [February 20, 2008, 10:05pm UTC](https://forums.speedlife.net/t/calling-engineers-turbo-idea/43168/52 "2008-02-20T22:05:15Z")

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> [@Final GTS](#):
>
> The particular Sprag bearing I am refering to links to a 1/4" shaft, transmits about 5-10 lb/ft of torque easily, and has a normal differential speed of 35,000 RPM. These would not need to transmit the full load of turbo spooling, only support a median-level turbine floor speed.
> 
> Think RC Car.
> 
> Now think harder.

And what is the rotational inertia of said shaft/assembly compared to 2 turbo impellers on a steel shaft?

RC cars use lightweight plastic parts and gearboxes/gears… neither of which apply to our freewheeling turbo idea

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