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Aftermarket tacho needle position at rest

Started by Heath , Nov 22 2009 10:10 AM

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3 replies to this topic

#1 Heath

I like cars.

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Name:Heath
Location:Eastern Suburbs, Melbourne
Car:Heavily Modified UC Sunbird Hatchback
Joined: 07-November 05

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Posted 22 November 2009 - 10:10 AM

I've been looking at monster tachos and stuff and been wondering, why don't they sit at '0RPM' when the car is switched off? What determines where they sit and why don't factory tachos ever behave like that? Can you adjust/influence whether they do that when the car's off? I don't know much about electronics so please respond in layman's terms lol, I'm quite curious

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#2 rodomo

To advertise here, call 13TORANA

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Name:R - O - B Dammit!
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Posted 22 November 2009 - 10:51 AM

Pull needle off.
Put back on in correct spot.
Check against other known good tacho.

Layman enough? :huh:

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#3 Stinga

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Name:Stinga
Location:Wollongong, NSW
Car:HD Holden ute, and sedan, UC torana
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Posted 22 November 2009 - 12:36 PM

Straight from the Autometer instructions of my monster fitted a few weeks ago:
Note: this tachometer has an air core meter. with power off, it is normal for the pointer to leave zero. when 12v is applied the pointer willmove to the correct position.

guess you could do some googling on the whole ''air core meter'' thing. i choose to stick with the smoke and mirrors theory