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What do these numbers mean?

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RocknTommy

RocknTommy

Senior Member
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Off of a 1975 Midget 1500.
The number dial in the box.
Thanks
THing.jpg
 
If I remember correctly this is a part of the emmissions system on the later Midgets and indicates the percentage of life used on the cat. When the numbers reached 100% then you would have had a lamp on the dash illuminated. It looks like you have used 82% of the life span already.
 
That is a S.I.C or service interval counter. It is meant to be in place in the middle of the speedometer cable. You would have 1 cable from the trans to the SIC, and another from the SIC to the speedometer. They would count up the miles (not decades) since you were last at the dealer. When it got to 25,000 (? not sure) a lamp would light on the dash telling you to hurry back for a check of the catalytic converter, fuel evap canister, and other crucial emissions stuff.

Unfortunately, they often broke before that first check up and the "fix" was to use a single piece cable avoiding all of that.

To answer your original question, that number is how many miles the box lasted before it broke, or broke the cable.

Peter C
 
Sorry, I defer to Bill's percentage. Triumphs used miles. But the dang things broke, regardless.

Peter
 
Thanks for the info. Interesting technique!
This car did not come with a catalytic converter when I acquired it.
 
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