How cool is too cool.?
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Road Captain
Joined: Jun 2010
Posts: 528
Likes: 44
From: Jakarta - Indonesia
How cool is too cool.?
My cooling fan works like a charm, it is operated manually by switch... Now I am actually concerned if it's cooling too much....when the ambient is not too hot around 80-85 my engine temp would get up to 280-290 when stuck in gridlock traffic, once I turn on the fan it can drop down to 230-250 when moving and drop further down to 210-217 when idling, now I actually am concerned if 210-217 is too cool for the engine to operate properly... It is a manual switch controlled, so constantly monitoring CHT on my PV and turning on and off the fan constantly is getting tiring...should I be concerned with CHT dropping as low as 210.??
Grand HDF Member
Joined: Sep 2013
Posts: 3,820
Likes: 587
From: Michigan
Short answer: No
The key is getting the oil temp high enough, long enough, to boil off condensates that accumulate in the system. Your overall operating conditions, as described, will do this.
The key is getting the oil temp high enough, long enough, to boil off condensates that accumulate in the system. Your overall operating conditions, as described, will do this.
Ultimate HDF Member
Joined: Dec 2006
Posts: 5,878
Likes: 17
From: The Desert SouthWest
That's no problem. My bike is FCS and Jagg cooled (no fan) and runs about 200-210 the past week or so with 60's temps.
You want it around 185 or above ideally I think. So you're still well above that.
Correction: OK hang on if you're talking CHT then I can't comment. I'm talking Oil Temps. Sorry for the mis-read of your post. Others can post on CHT as I do not monitor that.
You want it around 185 or above ideally I think. So you're still well above that.
Correction: OK hang on if you're talking CHT then I can't comment. I'm talking Oil Temps. Sorry for the mis-read of your post. Others can post on CHT as I do not monitor that.
Last edited by Arizona; Oct 18, 2013 at 09:59 AM.
Ultimate HDF Member
Joined: Dec 2006
Posts: 5,878
Likes: 17
From: The Desert SouthWest
This is important. Reaching full temp for long enough to boil out moisture and contaminants from condensation and startup. This takes about 20 min of riding at full temp (above say around 190'ish).
Cruiser
Joined: Jul 2006
Posts: 239
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From: Castle Rock, CO
Sh**, I'd jump for joy if I was you! ;-)....and I think that around 180-190 is the bottom end temps, but others may want to weigh in that actually have a more thorough technical background....also, depending on your oils that your using, slightly higher temps- 220-230 may be a good thing if you running, say, straight 50w....
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Road Captain
Joined: Jun 2010
Posts: 528
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From: Jakarta - Indonesia
Head temp
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Thread Starter
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Road Captain
Joined: Jun 2010
Posts: 528
Likes: 44
From: Jakarta - Indonesia
Sh**, I'd jump for joy if I was you! ;-)....and I think that around 180-190 is the bottom end temps, but others may want to weigh in that actually have a more thorough technical background....also, depending on your oils that your using, slightly higher temps- 220-230 may be a good thing if you running, say, straight 50w....
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Road Captain
Joined: Jun 2010
Posts: 528
Likes: 44
From: Jakarta - Indonesia
Yes, to be on the safer side I always allow my CHT to go up to 280 before turning fan on...
Ultimate HDF Member
Joined: Dec 2010
Posts: 7,776
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From: wet coast BC
what is normal CHT? I would keep notes on running & ambient temps, average cruise speed traveled without fans. say that result is 260 CHT. I would then turn on fan to keep temp at 260 CHT in all conditions.
why? something in memory says constant high to low temp changes cannot be a good thing
why? something in memory says constant high to low temp changes cannot be a good thing