Message text written by INTERNET:Brad.Kahler@141.com
>The 1184 [on the speedometer] means the number of turns of the cable to
equal one mile on the
>speedo.
<
Well, I got the tach working, but I did not have time to check RPM at 60
indicated mph.
I did roll the car around and got just around 1/4 turn for 1 engine
rotation. I guess the
Differential is 4.1 (assuming 1.0 fourth gear ratio). By my
calculations, with 185/70-15
tires, there are 800 tire rotations per mile, and therefore 3281 engine
revs per mile.
I will now check the indicated speed at 3281 rpm and rpm at 60 mph. I will
also check
a measured mile on the turnpike. What is the ratio of wheel turns to cable
turns?
BTW, the tach (a Smiths "racing" tach which reads up to 8 or 9k rpm) was a
little marvel
of clockwork. I got it working properly. I don't know exactly why it did
not work , but
once I had it apart, I blew all the numerous gears clean. Also it had this
red needle
that did not seem to do anything. I had thought it was a user-adjustable
redline indicator.
Well, I was wrong. When functioning properly, it is a max-rpm-used
indicator! Kind of cool.
It has a tooth that engages the rpm pointer wheel, except it does not
return to zero until reset.
I got it up to 4100 today. It makes this complicated ticking sound when
the engine is running.
Of course, with the minimal muffler (sounds good except for a nasty
rattle), and the
song of straight cut gears (at least in 1st,2nd,3rd), that clickety-click
disappears fast.
>Sounds like you need a new speedo cable or to drastically clean this one
>for sure. If its wavering a lot then it can very easily break
Well, it wavers about 5 mph, is that "a lot"? It IS annoying no matter
what.
-Tony
ARhodes@compuserve.com
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