Engine Temps
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Outstanding HDF Member
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From: Central Jersey
Engine Temps
Is the engine temp and oil temp around the same when at idle? I installed my Power Vision the other day and have setup the gauges. One of the gauges was for engine temperature. Is it normal to have a engine temp of 315 degrees or is the gauge giving a flase reading? I'm checking the engine temp not the oil temp.
Elite HDF Member
Joined: Nov 2010
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From: Simi Valley, CA
Engine temp and oil temp are two different measurements. The engine temp is actually the cylinder head temp (CHT) and your 315 reading, while maybe not desireable, is actually quite typical at idle.
Engine temp (CHT) can change quite rapidly while oil temp changes are much more gradual.
Do you have a portable fan? Bring it out to your bike, turn it on, direct the airflow at your engine and watch how quickly the engine temp will change.
Many of us run engine cooling fans on our bikes to prevent these high idle temperatures... https://www.hdforums.com/forum/tourin...test-data.html
And here's a thread of another fan system that many are using and looks really nice... https://www.hdforums.com/forum/tourin...tem-again.html
Engine temp (CHT) can change quite rapidly while oil temp changes are much more gradual.
Do you have a portable fan? Bring it out to your bike, turn it on, direct the airflow at your engine and watch how quickly the engine temp will change.
Many of us run engine cooling fans on our bikes to prevent these high idle temperatures... https://www.hdforums.com/forum/tourin...test-data.html
And here's a thread of another fan system that many are using and looks really nice... https://www.hdforums.com/forum/tourin...tem-again.html
Last edited by 2black1s; Dec 16, 2012 at 03:29 PM.
My 08 FLHX runs about 221*engine temp going down the highway @75 or so and gets up around 251* in town driving. My oil temp stays between 180* and 220*. I also have an HD oil cooler. You didn't specify when you were getting your 315* reading (ie.. Idling in the garage). If you're running that hot on the open road it sounds like you're way to lean.
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Outstanding HDF Member
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From: Central Jersey
My 08 FLHX runs about 221*engine temp going down the highway @75 or so and gets up around 251* in town driving. My oil temp stays between 180* and 220*. I also have an HD oil cooler. You didn't specify when you were getting your 315* reading (ie.. Idling in the garage). If you're running that hot on the open road it sounds like you're way to lean.
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
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From: Baton Rouge, LA
Is the engine temp and oil temp around the same when at idle? I installed my Power Vision the other day and have setup the gauges. One of the gauges was for engine temperature. Is it normal to have a engine temp of 315 degrees or is the gauge giving a flase reading? I'm checking the engine temp not the oil temp.
────────────────────── OT ──────── ET───────────────────
Idle, FCS fans on ───────── 205° ───── 235-245° ───────────────
Max observed, fans on ───── 225° ────── 250° ─────────────────
Normal city, fans on ─────── 205° ───── 230-240° ───────────────
Highway ────────────── 200-205° ─── 225-235° ───────────────
────────────────────────────────────────────────── ────
BTW, I've done quite a bit of testing using different AFR's, and running leaner does not make much difference in either ET or OT. Going from 14.6:1 to 13.8:1 showed an improvement of 7° for ET while OT showed no change. I'm currently running 14.5:1 in the cruise range (14.0:1 at idle) and the temps above reflect these settings.
Last edited by iclick; Dec 20, 2012 at 04:52 PM.
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