An odd thing happened to my tach during my tiico conversion. Prior to the
conversion my tach read 4K when my speed was 70mph. Now after the conversion
the tack reads 4.2K at 70mph. FYI: No changes were made to the gearing of
the car at the same time.

Any one else have this problem?

Where does the tach signal originate?

Noel '88 GL tiico