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  #31  
Old 03-08-2007, 02:05 PM
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My tach reads at least 10% low.

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  #32  
Old 03-08-2007, 02:29 PM
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Quote:
Originally Posted by WD8CDH View Post
My tach reads at least 10% low.
Mine's off a bit more...

John
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  #33  
Old 03-09-2007, 10:39 AM
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i vote for tach inaccuracy too.

tom w
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  #34  
Old 03-12-2007, 10:39 AM
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Mr. T

Just curious, why would you multiply the driveshaft rotations by 2?
Seems like the ratio would be driveshaft rotations to one wheel rotation.
Thanks...Al
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  #35  
Old 03-12-2007, 02:18 PM
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It would if you had a locking or limited slip differential. In which case you'd have to lift both tires too.
With an open differential and one wheel on the ground the axle drives the spiders, which drive the ring at half speed... 'cause one tire is not moving. So to immitate both tires making 1 full rotation you have to rotate a single tire twice.
Not the world most elegant explanation, but I'm positive the two rotations thing is right.

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