All of the temps posted here may or may not be out of alignment with "normal" it just depends on the conditions, there is no simple XXXF temp that can be considered normal across the spectrum of operation but 320+ on the front head is not uncommon, lots of variables that influence temps. At long distance sustained highway speeds of 70+ MPH the CHTs can get just as hot as idling in town.

At about 55 MPH the CHTs will remain much lower because that is about the ideal combination of speed and RPM where the engine is shedding as much heat as its making, above or below it will climb higher.

ET and CHT is the same thing, front cylinder head OEM ET sensor. I'm not sure what the PV is reading as ET and CHT because there is only one sensor in the front head

I wouldn't try to draw any conclusions from IR temp gun reading at the spark plug, especially after shutdown, you can se why by looing at the first graph on the performance charts page I recently published on the website http://www.wardspartswerks.com/new-p...ance-data.html Actually studying the trends demonstrated in the data logged charts can help to explain a lot of what happens with CHTs during operation.

Conventional wisdom regarding Harley temps is mostly inaccurate, I've been studying this subject for several years now and I'm still learning new stuff all the time.

 

Jason, thanks for chiming in. If anyone would know what temps are like, you are the one. I would imagine that a 103 would run hotter than your lean tuned 88" but don't know.


I don't know where exactly the PV is different for the temp numbers. I have an email in to Dyno Jet asking the same question as I cannot find an engine temp sensor in my manual. Could be overlooking it but.....

 

I had posted on this thread because after doing a 95" on my '00 it seemed to run hotter. I never measured temps when I had the 88" so I had no comparison except the seat of my pants. I was thinking that I was measuring temps after heat soak. The only stock temp. sensor is in the rear of the front head. My homewerk will be reading the Wards articles.

 

I use the Wards fans as well. I read Ward's complete history and his testing. One thing I don't understand is the fans seem to be drawing in hot air near the heads. Seems to me they would work better with forward air scoops.

The fans turn on at 190 degrees. (using the included thermistor) When I shut down the fans run for about a minute turn off than run again for 30 seconds. Meaning my heads are not that hot at all. Even in 95 degrees the fans don;t run a long time after shutdown but always go off then come back on for a shorter time which is consistent with Wards Charts although mine is a 103 and his an 88.

I still only wonder about the fans drawing in hot air being so close to the heat of the jugs. I have put my hand behind the fans and the air blowing is hot across the heads. Much hotter than ambient temps

 

are you getting engine temp & head temp at the same point in time, as in both displayed

 

Please explain how the Powervision monitors both engine temp and cyl head temp? My PV only monitors 1 temp, ET, which I beleive is taken from the cyl head. Mine reads 240-260 in 75-85F while cruising 40-70mph. Ive seen it over 300 on a hotter day stopped at the streetlight. I have since put an oil cooler on as per Fuelmoto's advice.

 

Running 75 mph with an 03 88ci two up and climbing from 5,000 ft to 6300 ft on a 80 degree day, my oil temp hit 255 degrees. Not a miss or knock but it was hotter than I had ever seen in. Is this the normal for those conditions and does it harm the engine? I've read where most say just throw the oil temp gauges away and ride. I would suspect that should you enter the area where you are doing harm to the engine, the engine will tell you with knocks and missing. What's correct?

 

It's simple. Go in to your gauges and add each one of them. ET(F) and HeadT(F) are what mine are named. If you don't have them, I suggest you updated your PV. Mine looks like this:

 

Yes, see the reply one above this.

 

I don't think updating my PV is going to do it for me. I have had my engine apart down to the cases and on an '09 the ET sensor is the only one, which is in the front head. Maybe in the '13's they have added a sensor, if so it would be interesting to know where the additional sensor is located. My ET's are in the 270 degree range when cruising at 70+ mph, I have an older set of FCS so they don't do much once the speeds get above 50. They work great in traffic though!