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[Royalroadie]

I have been having temp issues with my oil,  the HD cooler is just about worthless.  I changed to a full 3 hole synthetic which help just a little.  I have seen temps of 280+ on hot days.  I just ordered an UltraCool oil fan assisted oil cooler and will give a full report on the results.  Today I used my laser thermometer and had head temps 350* on the front head close to 400* on rear when the oil temp got high.  I took readings at several point on the heads, the hottest point was near the base of the spark plug. It was 94* here today.  The cyl walls where about 40-50* cooler than the heads.  I am first going to give the UltraCool a complete testing.  If that does not work I will add a Lenale cooling fan next..  If it continues it will be cam time with a full dyno tune.  I believe I am going about this in the most economical way.  I still have 2years of warranty left so the cams are a last resort.

[artanner1]

I put the ultracool on my bike first, then the 110 pro kit and tune. How much more power do you want? The 255s are a great tq cam, if your wanting the economical way...Get the bike tuneded and not by the dealership, then if your not happy with the heat then look at the oilcooler.

[HD Street Performance]

Have a look at Wards parts
http://www.wardspartswerks.com/cooling-fans.html
There is a lot of valuable information about motor heat here and solutions.

[HILLSIDECYCLE.COM]

Most any good cooler will peel 25-30 degrees off the oil.
Scott

[Jswerve]

Most any good cooler will peel 25-30 degrees off the oil.
Scott

Vs. the Harley cooler?

[Rooster]

Versus probably without one at all.

[Jswerve]

Versus probably without one at all.

That's what I was thinking.

[Rooster]

I think you were right

[Jswerve]

I think you were right

There's a first time for everything Hehe

[artanner1]

This was a very Good question... After you buy a Bike, and after you change out the pipes, breather and map down load from dealer, what is the next best thing to help with the bike running temp.
A good tune
oil cooler
fans
Lot of friends ask this question, My personal experience I thought was a tune.
Thanks,

[HD Street Performance]

Fuel is one way to cool them down a little but a little more goes a long way. Throwing a lot of fuel at the problem creates new problems and doesn't solve the issue.
Another question
What is "too hot"?
There are 3 elements of heat to consider
Radiant heat (the rider feels that)
Oil temperature
Cylinder head / components
Cooling the riding experience may not necessarily be helping the motor is my point
The afr and timing need to be properly set. With efi this is more precisely done by a good tuner.

[hrdtail78]

This was a very Good question... After you buy a Bike, and after you change out the pipes, breather and map down load from dealer, what is the next best thing to help with the bike running temp.
A good tune
oil cooler
fans
Lot of friends ask this question, My personal experience I thought was a tune.
Thanks,

IMO it is a tune.  Fuel does have a cooling effect, but nothing you will see from going to from 14.6 to 14.3.  Specific heat and latent heat comes into play to prove this.  What a richer mixture does do is slow down flame front travel which allows different timing strategy than a lean mixture.

We need and want to produce heat.  Ideally we want the pressure and heat to spike at the optimal piston location that gives the best leverage for push through the rod onto the crank.  Push early and the wasted heat absorbs into the surrounding metal.  Push to late and heat goes out the exhaust valve.

 

[artanner1]

Well!!!There you go!!! Science!!!!101.LOL

[ltank]

I was told by a Harley mechanic that the stock exhaust ports don't breath very well. Installing larger valves and flowing the ports to 89 percent of valve size will make the motors a lot cooler.  Was he full of it?

[HD Street Performance]

Was he full of it?
Yep

"The heat you feel in the saddle is coming from the cylinder heads and the exhaust", radiant.
"The main cooling effect of enrichment is lower EGTs, which translates into less heat felt by the rider. There is no significant drop in CHTs until you enrich the AFRs in the low 13s or lower. At that point you are just blowing unburned fuel out the pipes.." and carboning up the chambers / pistons