320 Degrees! How high is too high?
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,930
Likes: 8,033
From: poway
It's calculated by the ECM based on the temp sensor on the head and load on the motor..
Thread Starter
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Cruiser
Joined: Mar 2014
Posts: 101
Likes: 2
From: Maryland
^^^^^
Interesting info, you guys are either very creative or very sophisticated and knowledgeable or both.
Head temp+ Intake air algorithm
Head temp + load on the motor
Any references for this info?
Interesting info, you guys are either very creative or very sophisticated and knowledgeable or both.
Head temp+ Intake air algorithm
Head temp + load on the motor
Any references for this info?
Extreme HDF Member
Joined: Feb 2015
Posts: 10,907
Likes: 8,758
From: Galt's Gulch - MI
I'm confused. If the brass probe is screwed into the front head wouldn't the PV HT reading be the head temperature and the ET reading that is shown on the PV be an algorithm or some sort of calculation that was based on the HT reading? Where did you find the information that the probe was reading ET and then calculating the HT with an algorithm?
If you read the DK Custom FAQ links I posted it's also there:
Our target temperatures are:
Engine Temperature, as measured by the factory sensor & then displayed by the PV as "ET".
230* F everyday riding, with no more than 250* F in extreme circumstances.
(at 270* F you will feel the sluggishness in power, and accelerated engine wear begins)
Engine Temperature, as measured by the factory sensor & then displayed by the PV as "ET".
230* F everyday riding, with no more than 250* F in extreme circumstances.
(at 270* F you will feel the sluggishness in power, and accelerated engine wear begins)
Road Master
Joined: Feb 2016
Posts: 858
Likes: 140
From: USA
As far as I know, DD can only report the head unit temp, which is available through ECM. There is no oil temp built in for Dynas, therefore DD wouldt be reporting any oil temp.
People on this thread are talking about head temp, someone is saying 260 is extreme, which to me doesnt seem right.
Where did you get the info that 320 is normal for head temp?
People on this thread are talking about head temp, someone is saying 260 is extreme, which to me doesnt seem right.
Where did you get the info that 320 is normal for head temp?
I have never found any documentation from Harley that suggests a recommended maximum HT.
I monitor ET/HT on my PV. I see ET's of 230 to 250 depending on traffic and ambient air temperatures. HT readings on my PV generally range about 60 - 70 degrees higher.
Road Warrior
Joined: Jul 2013
Posts: 1,725
Likes: 193
From: South
Okay so you you are seeing HT's of 320.
I have never found any documentation from Harley that suggests a recommended maximum HT.
I monitor ET/HT on my PV. I see ET's of 230 to 250 depending on traffic and ambient air temperatures. HT readings on my PV generally range about 60 - 70 degrees higher.
I have never found any documentation from Harley that suggests a recommended maximum HT.
I monitor ET/HT on my PV. I see ET's of 230 to 250 depending on traffic and ambient air temperatures. HT readings on my PV generally range about 60 - 70 degrees higher.
I wonder if those functions still work without buying another license.
Road Master
Joined: Feb 2016
Posts: 858
Likes: 140
From: USA
Actually read that ages ago when I was researching EFI trying to decide if I'd buy an HD with EFI in it
If you read the DK Custom FAQ links I posted it's also there:
The displayed CHT is based on the ET and the IAT, the PV is making a mathematical guess as to the true head temperature of the front cylinder as HD positioned the sensor lower on the cylinder...
If you read the DK Custom FAQ links I posted it's also there:
The displayed CHT is based on the ET and the IAT, the PV is making a mathematical guess as to the true head temperature of the front cylinder as HD positioned the sensor lower on the cylinder...
Road Master
Joined: Jul 2013
Posts: 998
Likes: 1,366
From: San Diego
Sorry if this is a dumb question but with a bone stock Harley sitting in traffic in 95 degree weather, what is the running temp and what is too hot? I just do not hear of regular Harleys breaking from overheating??
Extreme HDF Member
Joined: Feb 2015
Posts: 10,907
Likes: 8,758
From: Galt's Gulch - MI
HD refers to the #32446-99 sensor as the engine temperature sensor. In the Power Vision that sensor is displayed as engine temperature (ET). Due to the position of the sensor the actual temperatures in the head would be higher than those numbers displayed by the engine temperature sensor so the PV uses the data from the engine temperature sensor and the IAT to derive an estimated/guesstimated CHT...
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Cruiser
Joined: Mar 2014
Posts: 101
Likes: 2
From: Maryland
HD refers to the #32446-99 sensor as the engine temperature sensor. In the Power Vision that sensor is displayed as engine temperature (ET). Due to the position of the sensor the actual temperatures in the head would be higher than those numbers displayed by the engine temperature sensor so the PV uses the data from the engine temperature sensor and the IAT to derive an estimated/guesstimated CHT...
Extreme HDF Member
Joined: Feb 2015
Posts: 10,907
Likes: 8,758
From: Galt's Gulch - MI
The intake air temperature sensor is part # 27381-06. When I have my Power Vision on the bike I monitor engine temperature (ET), cylinder head temperature (CHT), intake air temperature (IAT), and battery voltage (BV)...
http://partsfinder.onlinemicrofiche....CTION%20MODULE
http://partsfinder.onlinemicrofiche....CTION%20MODULE