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Post by haitch on Jan 28, 2024 18:40:59 GMT 10
Fitted a new (cheap) CHT guage under the spark plug on the LHS. As I have the aRacer Ural diagnostic tool, I thought I would run this live, through my phone. The Ural sensor is on the RHS under the throttle body. Running 95kph temp on RHS 137C.
Temp on LHS 170C. ideas??
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Post by Uralee on Jan 28, 2024 18:58:22 GMT 10
Fit your new sensor to the right as close to the original as possible to check calibration.
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Post by haitch on Jan 28, 2024 19:53:24 GMT 10
Fit your new sensor to the right as close to the original as possible to check calibration. Fitted to RHS under plug. Very similar, though hotter. 194c Probably due to running harder 105 to 110kph. Though Ural sensor only read 139c. Cant get closer as its under the TB, Opposite the exhaust valve and next to the inlet valve.I will have a go with the I/R gun at both locations. |
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Post by Uralee on Jan 29, 2024 7:44:43 GMT 10
50c difference has to be sensor…..
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Post by haitch on Jan 29, 2024 10:51:26 GMT 10
50c difference has to be sensor….. Which one? Is it possible the Ural sensor, due to its close proximity to the inlet valve, is staying cooler due to the inlet mix? Further, the newer engine ECU is configured to throw a MIL light at 170c. Head temp at the sparkplug is surely more than that. |
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Post by Uralee on Jan 29, 2024 10:55:25 GMT 10
You need to play with the IR gun.
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Post by haitch on Jan 29, 2024 11:17:19 GMT 10
You need to play with the IR gun. Yep. Does my Ural sensor theory sound plausible?? |
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Post by Uralee on Jan 29, 2024 19:12:56 GMT 10
You need to play with the IR gun. Yep. Does my Ural sensor theory sound plausible?? Intake area would be the coolest of course. |
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Post by haitch on Jan 29, 2024 19:19:56 GMT 10
I wonder what the CHT would be if the MIL light came on at 170c as determined by the under TB Ural sensor.
I noted Philg had twin aircraft sensors, commonly used in the USA. They are redlined about 200c to 230c. These are underplug thermocouples too.
Testing continues.
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Post by Uralee on Jan 30, 2024 8:19:09 GMT 10
The temperature will vary in all parts of the cylinder head. Hottest will be at the exhaust…..hence best place for exhaust at front in the air flow.
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