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Have something you may be interested in. Similar
to other calibration boxes, but has a couple extra "features", such as
speed foldback (above certain Speed freq is cut in half) or frequency clamp (
wont output speed higher than X regardless of input speed) which should bypass
most speed limiters. 12 user adjustable Dip switches adjust output from 4x input
to 0.23x input. I put one inside a small Hammond 1590A waterproof AL box for
underhood use on my 95 S-10, since speedo cal in this PCM not readily acessable,
and dealer wouldn't re-flash correct calibration. Have about 10 PCBs left and
complete parts. Email me if interested.
Eric
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