Head temps
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Tourer
Joined: Jun 2016
Posts: 378
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From: Temperance Michigan
Head temps
First ride today after changing the rear tire, Rear shocks, and oil. Temps in the 60. Watching my power vision and I was seeing Head Temps in the 300-350 range. That def doesn't seem normal for me. I swear they where 280 ish last year. Though on what could cause this or should i not worry about it.
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Joined: Dec 2018
Posts: 57
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From: Bitterroot Valley, MT
My 17 STreet Bob, stage one w/ PV (Fuel Moto map) does the same thing. Yesterday head temps were 325* riding at a steady 70mph. Head temps dropped down to 295 at a red light. Less explosions happening at idle and the jugs are cooler from your last run at 70.. Of course, they will start to creep back up the longer you sit stationary. You can do a test through quick tune, add some fuel % and see if the temps drop a bit at speed.
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Joined: Dec 2018
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From: Bitterroot Valley, MT
https://www.hdforums.com/forum/engin...head-temp.html
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Joined: Dec 2018
Posts: 57
Likes: 37
From: Bitterroot Valley, MT
OP, after a bit of googling....Looks like the PV head temp is calculated number not a true temp reading. The PV engine temp is an actual temperature reading from the head. If that’s the case both of our bikes would be in the normal range. That being said, from what I’ve found it would appear that even though the PV head temps seem really high, we are in the normal (calculated) range as well. If this info is true, not sure why PV would have it labeled as “head temp” if it is not a true reading.. Guess they have their reasons.
I suppose everything I found could also be total BS
I suppose everything I found could also be total BS
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Cruiser
Joined: Nov 2014
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From: ok
Just to make sure, you are talking about head temp and not engine temp correct? If so, I may have to dive into this further. A quick search and I found this. Check out Jaimes post #4.
https://www.hdforums.com/forum/engin...head-temp.html
https://www.hdforums.com/forum/engin...head-temp.html
20w50 in winter and 20w60 late spring/summer. Jagg Slimline oil cooler with Wards thermostat. Flo oil filter(didn't do anything to my temps really but it was a gift).
Your tune is probably a bit lean.
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On the PV reading of the Engine Temp, you want to keep that between 200 and 230, going over 230 and performance begins to drop, going over 250 and accelerated engine wear begins.
While a too lean tune is not good and should be remedied, richening up a tune is going to have very little effect on engine temperatures....maybe as much as 10*, but that is just a small dent in how hot these run from the factory.
PV Engine Temps of 250-300 are "normal", BUT, they are not right/good for performance or for engine longevity.
Below are two very informative reports worth reading on Harley's and engine temps.
Why and how to Cool down your Twin Cam and M8 Engine
Sleeper Performance Mods Report
While a too lean tune is not good and should be remedied, richening up a tune is going to have very little effect on engine temperatures....maybe as much as 10*, but that is just a small dent in how hot these run from the factory.
PV Engine Temps of 250-300 are "normal", BUT, they are not right/good for performance or for engine longevity.
Below are two very informative reports worth reading on Harley's and engine temps.
Why and how to Cool down your Twin Cam and M8 Engine
Sleeper Performance Mods Report
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Thread Starter
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Tourer
Joined: Jun 2016
Posts: 378
Likes: 53
From: Temperance Michigan
Sorry been a busy weekend. Yes i was talking Head Temp. I am guessing I switched it at the end of the year from Engine temp.
Today ride in I only really for the ENG temp to around 240/250 in city traffic and the head temp was around 320 ish. I am guessing she does run hot since I don't have any aftermarket cooling on it yet. I just turned eng temp back on and that today. What I do find strange is this morning before starting the bike the Head Temp was reading 122F even though I never road the bike etc. anyone seeing this also?
Today ride in I only really for the ENG temp to around 240/250 in city traffic and the head temp was around 320 ish. I am guessing she does run hot since I don't have any aftermarket cooling on it yet. I just turned eng temp back on and that today. What I do find strange is this morning before starting the bike the Head Temp was reading 122F even though I never road the bike etc. anyone seeing this also?