On Mon, 12 May 1997 08:40:23 -0500 Robert Allen <boballen@sky.net>
writes:
>I picked up a serviceable speedometer ..... On a road test the
odomoeter is (surprise!) pretty darn close enough.
>
>But the speedometer is 20% high. (At around 60 I'm seeing 70+).
>
>So you wanna take a guess at how much material should be taken off the
end of the permanent magnet to bring the speed down .....
_____
V 70/60 = 1.080
______
V 1.2/1.0 = 1.095
Measure carefully, and go at it slowly. Easier to take off more later
than to add it back on. I don't know what the current air gap is, but if
it starts out at 0.030" we're talking less than 0.003" here.
Lemmeno how you make out.
Barney Gaylord
1958 MGA
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