Tachometer
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Tachometer
I have a swiss 710m.
Electronic ignition.
I installed a VDO tachometer that does not work properly.
The tach responds to different engine speeds but never goes past the 500 rpm mark. To me it looks like it is reading a tenth of what it should read.
I have checked the dip switches and wiggled and/or cleaned all the connections to no avail.
Any ideas?
Thanks
Electronic ignition.
I installed a VDO tachometer that does not work properly.
The tach responds to different engine speeds but never goes past the 500 rpm mark. To me it looks like it is reading a tenth of what it should read.
I have checked the dip switches and wiggled and/or cleaned all the connections to no avail.
Any ideas?
Thanks
tachometer
I bought a VDO tach and had to get a resister to make it operate properly, from 24v down to 12v. A friend sent me a step by step pictorial installation guide. The tach worked for awhile but would flop back and forth from 500 to 6000 rpm's I had to send it back. Now the one I have works well, I used the same guide that my friend sent both times.
It makes a difference where you tap off the input from the electronics for the dist., at least it did for me.
I also bought an electronic speedometer that died after 2000 miles. Not real happy with VDO stuff. I put the mechanical speedo back in and although it is a bit off because of the 33 inch tyres it still reads and works. I just have to do a bit of math sometimes to get the 8% discrepancy for the tyres. Figuring MPH from KM is no problem, just multiply by 6 for a reasonable guess.
It makes a difference where you tap off the input from the electronics for the dist., at least it did for me.
I also bought an electronic speedometer that died after 2000 miles. Not real happy with VDO stuff. I put the mechanical speedo back in and although it is a bit off because of the 33 inch tyres it still reads and works. I just have to do a bit of math sometimes to get the 8% discrepancy for the tyres. Figuring MPH from KM is no problem, just multiply by 6 for a reasonable guess.
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- Posts: 206
- Joined: Mon Sep 28, 2009 11:36 am
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Dippy Tach
Hey Paul !!
I reversed the dip switch settings as you suggested and.............IT'S ALIVE !!! I have to laugh because I am dumb as a sack of rocks about electricity ..I compare everything to pipes and valves and waterflow...when it didn't work when we put it in I told my son to switch the dip settings 'cause "the valve must be backwards" and he gave me hell and a bunch of electrical theory..i can't wait to rub it in.!!
I wonder if there is a table comparing speed to rpm in the various gears ..or at least in 5th?
Reads about 600 at idle so am guessing it isn't too far off.
I use a GPS for a speedometer...I was thinking of getting a programmable from VDO but maybe not what with the bad reviews
Thanks again,
Bob Gray
I reversed the dip switch settings as you suggested and.............IT'S ALIVE !!! I have to laugh because I am dumb as a sack of rocks about electricity ..I compare everything to pipes and valves and waterflow...when it didn't work when we put it in I told my son to switch the dip settings 'cause "the valve must be backwards" and he gave me hell and a bunch of electrical theory..i can't wait to rub it in.!!
I wonder if there is a table comparing speed to rpm in the various gears ..or at least in 5th?
Reads about 600 at idle so am guessing it isn't too far off.
I use a GPS for a speedometer...I was thinking of getting a programmable from VDO but maybe not what with the bad reviews
Thanks again,
Bob Gray
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Good to hear you got it working. It seems that the 12v VDO tach is more responsive/accurate when truck is equiped with Pertronix module VS points.
Here is a lnk to a nice tach/hr meter.
http://www.aircraftspruce.com/catalog/i ... ometer.php
Here is a lnk to a nice tach/hr meter.
http://www.aircraftspruce.com/catalog/i ... ometer.php
tachometer
Looking at the Aircraft Spruce tach specs, there was mention of saving settings. Does power have to be maintained, similar to a radio to save channel settings, for this feature to be effective?
When I remove the battery key all settings on the radio are gone, don't even use them.
When I remove the battery key all settings on the radio are gone, don't even use them.
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Re:
Jim,Jim LaGuardia wrote:Good to hear you got it working. It seems that the 12v VDO tach is more responsive/accurate when truck is equiped with Pertronix module VS points.
Here is a lnk to a nice tach/hr meter.
http://www.aircraftspruce.com/catalog/i ... ometer.php
The link you provided is a 404. Could you please confirm which tacho you recommend out of this lot?
http://www.aircraftspruce.com/menus/in/tachometers.html
Thanks
- TechMOGogy
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Re: Tachometer
Just use this one from SAV
http://www.pinzgauer.com/showdetails.ph ... no=SAV1404
http://www.pinzgauer.com/showdetails.ph ... no=SAV1404
72 Pathfinder | 75 710M 2.7i | 96 350GDT Worker
Re: Tachometer
I saw that one, but from above Jim said this :TechMOGogy wrote:Just use this one from SAV
http://www.pinzgauer.com/showdetails.ph ... no=SAV1404
I figured I would listen to someone who knows a lot more than me.Jim LaGuardia wrote:That 12v VDO tach is a pile of crap
Spend the extra few bucks and get a 24v one from aircraft spruce.
Every 12v VDO tach I have installed or adjusted are not accurate.
They are usually 300-500 rpm off.
Re: Tachometer
http://www.issprogauges.com/Classic-0-5 ... r85090.htm
It's nice to have a big easy to read face that's not over scaled. 5000 RPM and just twist the signal wire around the coil wire.
It's nice to have a big easy to read face that's not over scaled. 5000 RPM and just twist the signal wire around the coil wire.
'76 710K
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Re: Tachometer
Has anyone seen a 24 volt digital tach?
Re: Tachometer
I have a 50mm digital VDO 12V, but they do have a line 12/24v but they are 85mm.
http://www.vdo-instruments.com/instrume ... eters.html
http://www.vdo-instruments.com/instrume ... eters.html