tachometer calibration
#1
Don't hate my V8
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tachometer calibration
hi,
i was wondering if theirs anyway to calibrate the factory tachometer, mines off by about 500rpm. or if you need to just replace it with an accurate factory unit
i was wondering if theirs anyway to calibrate the factory tachometer, mines off by about 500rpm. or if you need to just replace it with an accurate factory unit
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I have to admit my ignorance here.. Does the ECU send a signal to fire the coils or does it simply get a report that they have fired? [I've always assumed the former..]
#14
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There are 2 variable resistors at the backside of the tachometer. I know the bigger one is for setting the range of the tachometer. If you turn it anti clockwhise the tachometer range will increase which means you will for example hit the rev limiter while the tachometer only is showing 6000 rpm.
I guess the smaller resistor is for setting the lower range but I never tested it.
I had a S5 tachometer for a while because my original S4 one was damaged. I had to change a part on the PCB and resolder everything. The S5 tachometer was showing much too low rpms when idling because I still was using the S4 needle which is a bit longer and thereby heavier. I think I could have adjusted that by turning the small resistor because all the electronic parts on the PCB were exactly the same as on the S4 PCB but as I said i never tried it because it only took 2 days to repair the S4 tachometer.
I guess the smaller resistor is for setting the lower range but I never tested it.
I had a S5 tachometer for a while because my original S4 one was damaged. I had to change a part on the PCB and resolder everything. The S5 tachometer was showing much too low rpms when idling because I still was using the S4 needle which is a bit longer and thereby heavier. I think I could have adjusted that by turning the small resistor because all the electronic parts on the PCB were exactly the same as on the S4 PCB but as I said i never tried it because it only took 2 days to repair the S4 tachometer.
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Don't hate my V8
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so i just need to adjust them counterclockwise a touch i think, i'm guessing that they both work in the same manner so to adjust the entire range down i'll adjust them both an identical amount
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