Question For Those w/ Autometer Gauges!!! - Team Camaro Tech
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post #1 of 9 (permalink) Old Jul 17th, 06, 12:09 PM Thread Starter
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Question For Those w/ Autometer Gauges!!!

I have Autometer Phantom Gauges mounted in the Covan's Classic Gauge Pod. My speedo isn't very accurate at all. I got a electronic sending unit for it, and it's still off. If i'm cruising at 35mph, the needle floats from 25-45mph. My brother has Autometer gauges in his Datsun, and his does it too, but not as bad. Only maybe a 5mph variation. Just wanted to see if there's anything i can do to make it read more accurate. Thanks!

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post #2 of 9 (permalink) Old Jul 17th, 06, 12:19 PM
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Re: Question For Those w/ Autometer Gauges!!!

4 speed trans? If so, did you mount the sending unit directly off the trans or through the cable?

The cable will make the electronic speedo bounce.

On some 4 speeds the shift linkage won't allow a direct connection from the trans to the sender. I just did one and the needle bounced pretty bad, even though I used a 12 inch cable.

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post #3 of 9 (permalink) Old Jul 17th, 06, 01:20 PM Thread Starter
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Re: Question For Those w/ Autometer Gauges!!!

Quote:
Originally Posted by ZZ430DropTop67RS
4 speed trans? If so, did you mount the sending unit directly off the trans or through the cable?

The cable will make the electronic speedo bounce.

On some 4 speeds the shift linkage won't allow a direct connection from the trans to the sender. I just did one and the needle bounced pretty bad, even though I used a 12 inch cable.
It's a Muncie M20 trans. But i think the linkage is one side, and the sender is on the other. It's directly mounted on the trans.

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post #4 of 9 (permalink) Old Jul 17th, 06, 01:23 PM
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Re: Question For Those w/ Autometer Gauges!!!

Mine is very accurate. Did you follow the calibration proceedure?

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post #5 of 9 (permalink) Old Jul 17th, 06, 02:19 PM Thread Starter
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Re: Question For Those w/ Autometer Gauges!!!

Quote:
Originally Posted by eville
Mine is very accurate. Did you follow the calibration proceedure?
I don't know my mechanic installed it for me. Could you explain the calibration procedure for me? Much appreciated!

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post #6 of 9 (permalink) Old Jul 17th, 06, 02:32 PM
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Re: Question For Those w/ Autometer Gauges!!!

http://www.autometer.com/tech_faq_an...x?sid=2&qid=40

I found this link over at Autometer.com

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post #7 of 9 (permalink) Old Jul 20th, 06, 07:38 AM
 
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Re: Question For Those w/ Autometer Gauges!!!

I have the same setup in my 86 with the 700 overdrive transmission. I got rid of the cable since the sending unit attaches directly to the same spot on the transmission the cable end screwed onto.
I had problems with the speedometer needle bouncing at first. After doing some checking I found that where the sending unit screws to the transmission was loose. The O ring disentigrated. After replacing the O ring it snugged up nicely. I have not had any more problems and the needle is very steady now.
The calibration process is: Go to a place where you know you have a measured 2 mile run. I use the interstate because they have put call boxes at the mile markers. Stop before the mile marker. Shut the engine off. Hold trip button and crank engine. The needle will drop and point straight down. Drive up to where the measured mile starts. Push the trip button again. The needle will now point straight up. Drive for 2 miles at a slow rate (40-50MPH). After stopping at the end fo the 2 miles you push the trip button again. It will go to 0. You are now calibrated. Don't drive fast to do this. Your tires will heat up which increases their size and will cause a bad calibration.
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post #8 of 9 (permalink) Old Jul 20th, 06, 08:23 AM
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Re: Question For Those w/ Autometer Gauges!!!

Quote:
Originally Posted by tawodi
The calibration process is: ...." Hold trip button and crank engine. The needle will drop and point straight down. Drive up to where the measured mile starts. Push the trip button again. The needle will now point straight up. ....

tawodi - when you do your calibration, the needle drops straight down to begin with?? When you say straight down, do you mean down less than zero, or is it wrapping all the way around more than the max speed?

The Autometer info says "The pointer will then move to full scale." I always interpreted that to mean at/or past the 160 on the scale,,,,, mine likes to go the other way and go down below zero.

Just curious which way your needle moves to begin with during the cal process??

still haven't got mine to work,, but may very well be a sending unit problem. Haven't found time to dig into it yet. Gotta be bad sender, or speedo itself,, not much to the wiring.

thanks for any info.

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post #9 of 9 (permalink) Old Jul 20th, 06, 11:49 AM
 
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Re: Question For Those w/ Autometer Gauges!!!

I have the carbon fiber guages.When holding trip button in while cranking and then releasing it after the engine cranks my needle drops straight down to point at the floor. 0 is at about 7:30 on the clock face with 160 at about 4:30. When pointing straight down it would be like pointing at the 6 on the clock face. It does not wrap around past 160 but drops counterclockwise from 0. Sounds like yours is operating correctly. When I push the trip button at the beginning of the measured 2 miles it goes straight up and points at 80MPH. It stays there until you stop and push the button again. As far as sending units go... It sounds like there is a burr or something causing yours to catch which will cause needle on speedo to bounce. My unit screws onto the transmission and has a short (3 inches or so long) cable. The piece that I got with the unit was a little small and we replaced it with a solid piece square of metal (old screwdriver shaft) that fit the square hole better. If the cable piece is too small it could be slipping and not turning the sending unit as it should.
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