 CHT Gauge, Test to verify it's working ? |
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| jim_hoyland |
 Jun 25 2012, 07:33 AM
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#1
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Get that VIN ?  Group: Members Posts: 9,287 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California 
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Is there a test that can be done on a CHT before acquiring a harness ? I picked up the gauge but didn't get a wiring harness.
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| type47 |
Jun 25 2012, 08:28 AM
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#2
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Viermeister Group: Members Posts: 4,254 Joined: 7-August 03 From: Vienna, VA Member No.: 994 Region Association: MidAtlantic Region |
VDO? Since it's "powered" by a thermocouple, I don't think you want to put any more than micro Volts to the terminals.....Also, from your pic, since you have no signal to the gauge since you don't have it connected to the harness and thermocouple and since the needle is not at "zero", I'd say the gauge is "sprung"/broken due to connection to too much voltage
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| 76-914 |
Jun 25 2012, 01:13 PM
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#3
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Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,500 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California
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I just went thru that a while back. I've got extra senders w/ lead if interested. VDO & Dakota. I found the Dakota matched my VDO gage better than the VDO sender. (IMG:style_emoticons/default/WTF.gif) Anyway, PM me if interested. kent
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| VaccaRabite |
Jun 25 2012, 01:56 PM
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#4
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En Garde! Group: Admin Posts: 13,442 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
If the sender is not made for the gauge you may get false readings. Also, the VDO gauge is not ambient temp compensated so the engine could read differently depending on the outside temp. Maybe better then nothing but not the best solution out there.
Personally, if you want to know what your CHTs are, you should get the Dakota Digital or some other temp compensated gauge. The VDO is IMHO, not worth the effort or dash real estate. Zach |
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| McMark |
Jun 25 2012, 11:08 PM
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#5
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
If it says VDO on it, it's broken. (IMG:style_emoticons/default/happy11.gif)
http://www.914world.com/bbs2/index.php?showtopic=188188 |
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| Valy |
Jun 26 2012, 12:25 AM
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#6
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Senior Member Group: Members Posts: 1,675 Joined: 6-April 10 From: Sunnyvale, CA Member No.: 11,573 Region Association: Northern California |
All sensors are the same - K type thermocouple.
The gauge sensitivity should be 40uv/C |
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| ape914 |
Jun 26 2012, 11:03 AM
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#7
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red locktite Group: Retired Members Posts: 240 Joined: 7-February 11 From: In front of a computer Member No.: 12,676 Region Association: None |
the VDO serves a nice purpose, it may not be compensated for outside temp, but it will serve as a warning if something goes wrong and you over heat the head. well worth the dash real estate, and effort, may not be the best, but the price is often right . yeah if I had the budget a compensated TC on all cylinders would be my choice, but the budge dictates a less pricey alternative.
note that you gauge is likely at fault, as it should not have the shown indication with no thermocouple attached. |
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| McMark |
Jun 26 2012, 11:13 AM
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#8
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
But the price is nearly the same as the Micro1000 gauge which IS temp compensated...
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| jim_hoyland |
Jun 26 2012, 01:01 PM
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#9
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Get that VIN ? Group: Members Posts: 9,287 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California
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QUOTE(McMark @ Jun 26 2012, 10:13 AM)  But the price is nearly the same as the Micro1000 gauge which IS temp compensated... The VDO is going to the junk pile; I'm looking at the Micro 1000 and Dakota Digital, big issue right now is enlarging the cigar lighter hole. |
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| McMark |
Jun 26 2012, 04:57 PM
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#10
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
Check this thread for a tool that makes perfect holes with no fuss. They're not too expensive on eBay, and if you don't want to hang on to it, I'll buy it from you when you're done.
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