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Re: Speed, RPM, fun facts

To: Barney Gaylord <barneymg@ntsource.com>
Subject: Re: Speed, RPM, fun facts
From: Skye Poier <skye@ffwd.bc.ca>
Date: Fri, 9 Oct 1998 10:34:16 -0700
Word on the street is that Barney Gaylord said:
> >Here's some more interesting information.  My speedo has the following
> written on it:  Jaeger SN 6125/04 1060
> >
> >Is 1060 the turns/per/whatever?
> 
> Yes, 1060 turns per mile, and probably the wrong speedometer for your
> application.

Possibly not - I forgot to mention my '66 has a later model 4 sync + OD
transmission shoehorned in thanks to the PO.  I'm *guessings* its the
black label LH type tranny.

> Get a 1280 speedometer and you'll be correct within 1% on miles.  Your 1060
> speedo likely also reads 20% too high an speed as well, so when it says 60
> you're likely only going about 50.

Another "gift" of the PO is that the speedo has been adjusted so that it
tries to read out kph instead of mph.  It was a bit of a shocker when I
first got the car and noticed "hey it says I'm going 100 mph.  Hmm."

> If you remove the back from the tach you will find a small potentiometer
> inside that is used to adjust the output reading on the face.  If you have
> enough hands and eyes you could set it to read 3270 while cruising at 60
> mph on the freeway in direct drive (4th gear, no OD).  Otherwise you could
> set it by using some known good tachometer for a speed reference.

I gather the adjustment would take place with the tach popped out of the
fascia.. *pictures the passenger steering and me with my head in the
footwell with one hand on the accellerator and the other behind the
dash going 60 mph down the freeway*   - not a good scene ;)

Sigh.  My speedo seems to be all gummed up now that the weather has turned
a little cold.  I suppose I should yank that too and look for stripped
teeth gears etc.  Rises and falls very slowly and often gets "stuck" -
rapping the glass will move it a bit.

Skye

--
1966 MGB               GHN3L-70307                __,__\__
The MGB Experience     http://www.mgb.bc.ca/     (_o____o_)

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