2nd Generation Specific 1986-1992 Discussion

tach/rpm readings

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Old 04-15-2009, 11:52 PM
  #11  
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Originally Posted by Rob x-7' post='920528' date='Apr 15 2009, 03:01 PM
I think it was icemark who told me that the factory tach is adjustable?



here is what he said: Pretty easy to re-calibrate the stock gauge. There is a adjustment pot right on the back of the gauge's sub panel.





both of my FC tachs are way off, I have shift lights in both and just rely on the lights


R.I.P IceMark and all his knowledge



i have a shift light in mine but it doesnt work i also have an annoying constant buzzing sound that seems almost like a horn but will suddenly go away with a sudden jerk on the steering wheel i keep thinking its a problem in my horn relay but i completely removed my horn wire from the steering wheel but it still goes off
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Old 04-16-2009, 11:55 AM
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mine are off at higher RPM, by as much as 1000 rpm
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Old 04-16-2009, 03:31 PM
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I dont see any adjustment screw, is it behind the gauge itself?



Interesting enough this is a NA cluster, the circuit board has BOOST on it, so I guess you could trace the wiring and take the volt gauge out and put a factory boost gauge in its spot



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Old 04-16-2009, 03:43 PM
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from grannys speed shop:



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Old 04-16-2009, 03:47 PM
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so you obviously have to take it all apart!



thanks for the picture, maybe one day I will calibrate that crap- yeah right who has the head to take all that **** apart and put it in again and keep going until its accurate?
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Old 04-16-2009, 04:09 PM
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idk but i just checked mines only 500 off all the way thru the rpm range way too much work for something so miniscule
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Old 04-17-2009, 01:27 PM
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Originally Posted by jwteknix' post='920571' date='Apr 16 2009, 05:09 PM
idk but i just checked mines only 500 off all the way thru the rpm range way too much work for something so miniscule
Just remove the face and rotate it a bit, match the numbers to the needle, haha.
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