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Tach VS. OD Speed Check..!] -Reply

To: GOFASTMG@aol.com, mmcewen@gpu.srv.ualberta.ca
Subject: Tach VS. OD Speed Check..!] -Reply
From: Dan Hughes <Dan_Hughes@troweprice.com>
Date: Thu, 13 Mar 1997 16:06:59 -0500
I looked it up and yep, right on. As a guy w/o overdrive, I look at those
numbers with envy!

>>> John McEwen <mmcewen@gpu.srv.ualberta.ca> 03/13/97 01:59pm >>>
>In a message dated 97-03-13 05:17:04 EST, you write:
>
><< anyone out there with an OverDrive MGB can refresh me on what the MPH's
> are at 3500, 4000, & 4500 Rpm in OVerdrive, I have pretty standard
> diameter tires....
>  >>
>
> Jim,
> According to the owners manual, in 4th gear, non OD, you should turn 17.6
>MPH per 1000 rpm.  In 4th OD the figure in 22.4 MPH per 1000 RPM
>
>Hope this helps
>
>Rick Morrison

I can verify that these numbers are correct.  I have a '70B with the correct
original tire size 155 SR14.  My tachometer reads 3200 rpm at 70 mph indicated
while in OD.

John McEwen





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