NoPistons -Mazda Rx7 & Rx8 Rotary Forum

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-   2nd Generation Specific (https://www.nopistons.com/2nd-generation-specific-17/)
-   -   tach/rpm readings (https://www.nopistons.com/2nd-generation-specific-17/tach-rpm-readings-72126/)

RicerJ 04-15-2009 11:52 PM


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

Rob x-7 04-16-2009 11:55 AM

mine are off at higher RPM, by as much as 1000 rpm

Rob x-7 04-16-2009 03:31 PM

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



http://robx-7.nopistons.com/d/2990-1/cluster%20002.jpg

Baldy 04-16-2009 03:43 PM

from grannys speed shop:



https://www.members.tripod.com/~grannys/2tachlayout.jpg

Rob x-7 04-16-2009 03:47 PM

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?

jwteknix 04-16-2009 04:09 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

Baldy 04-17-2009 01:27 PM


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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