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> CHT question for the Electrical experts
914werke
post May 25 2019, 12:36 PM
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So will the soldering of the lead cause or change the operating resistance ?
I will replace it but I need to get it going & over memorial day WE I aint gonna find one.

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Olympic 914
post May 25 2019, 12:56 PM
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Not an electrical engineer, but I think you will be safe. the range in ohms of the CHT is pretty large, like <99-3200 . so an added resistance of an ohm or two should NOT make much difference.
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worn
post May 25 2019, 03:41 PM
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QUOTE(914werke @ May 25 2019, 10:36 AM) *

So will the soldering of the lead cause or change the operating resistance ?
I will replace it but I need to get it going & over memorial day WE I aint gonna find one.

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I think you will be ok if you are going copper to copper. The voltages from the thermocouples are in the microvolt range as I recall, so it doesn’t pay to add resistance.
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Bleyseng
post May 26 2019, 12:27 AM
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I have a couple of spare cht’s
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barefoot
post May 26 2019, 05:01 AM
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CHT ? CHT??
Are we talking about the one screwed in the head near #3 chamber, or we talking about one that screws under a spark plug.
the spark plug ones are thermocouples but I'm not sure if the #3chamber are TC's or a different thermistor device. Experts needed.
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Mark Henry
post May 26 2019, 09:59 AM
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Crimp only.
I did this with the VDO on my bug because the plugs are 12mm, works perfectly...for a VDO.
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rjames
post May 26 2019, 11:20 AM
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QUOTE(Mark Henry @ May 26 2019, 08:59 AM) *

Crimp only.
I did this with the VDO on my bug because the plugs are 12mm, works perfectly...for a VDO.

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