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> Hyfire and silver dot tach - Working!, Mod your tach to work with a hyfire box
agrump
post Apr 10 2005, 05:31 AM
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My early silver dot tach did not work at all once I installed a hyfire ignition box. This is caused by the fact that the stock tack is looking for a high voltage signal that no longer exist. I was able to modify the tach to run off of the Hyfire's tach port by placing a jumper over the initial signal resister. As a side note I experimented with the hyfire's tach testor and found that the stock tach is pretty acurate.


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machina
post Apr 10 2005, 06:21 AM
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that's great.

I could never get mine to work and just went with an autometer. Does the old tach still bounce around alot? I kind of got used to the dead steady new tach but I would go back to the original unit if it worked OK.
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