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Microtech Tach out put

Old 09-02-03, 08:50 PM
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Tach out put

If I remove the stock cumputer and install a Microtech, Can the stock tach give me a correct reading from the microtech tach output?
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Old 09-03-03, 02:44 AM
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if you have a LT the tach output comes from the factory output off the coils,
if you have a LTX the output is form the ecu, it is a standard square wave output,
so yes your factory tach will still work.,

Dale
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Old 09-03-03, 02:11 PM
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"correct reading" is a loose term. My stock tack is usually off +-400 rpm
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Old 09-03-03, 03:55 PM
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you need to calibrate the tach then
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Old 09-03-03, 07:09 PM
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How to Calibrate the Tach

How do you calibrate the tach? Does it use a resitor or is there an adjustment screw in the tach
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Old 09-03-03, 07:48 PM
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Thanks to RETED for this snippet of info:


Not a problem for an FC...

There is a "calibration" screw on the FC circuit board that you can adjust so the revs should match. We normally calibrate the instrument cluster with a simple stand-alone uP to handle such adjustments. You probably can do this by looking at the RPM display off your Microtech and adjust the needle until the RPM's correspond correctly. I can't confirm if this works on an FD3S intrument cluster...
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Old 09-03-03, 10:25 PM
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"stand-alone uP". What and where can I find one of those? Back In the day, my S-AFC exhibited the off readings too. I Imagine the LT8 will posses the same variance.
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