For a fixed amount of heat from the engine the oil will have a lower temperature rise with a higher flow rate as long as the air flowing over the engine assembly can absorb the same amount of heat.
For oil the temperature rise = BTU/ (GPM x ~400)

 

If more heat is being transferred to the fins, wouldn't the fins be hotter?

 

correct.. therefore taking less heat out of the engine..

 

"Here we go round the mulberry bush, mulberry bush, mulbery bush.......................so early in the morning".

 

That would make sense, but as long as the bike is moving, the airflow should absorb the extra heat. Even sitting the heat will radiate into the air (how much depends on ambient air temperature, of course).

Cheers!

 

FWIW, Oil temperature can only be properly read in the pan or (bag) with a sensor to read it. Pulling the info from cylinder head or other area isn't truly accurate. I use my power vision and use it as a reference.Like always YMMV

 

That's possible. Hmmmm...... maybe I should go do a few dyno pulls. If I was sumping before the new plate/pump and made 131/135 , I wonder how much was potentially lost? Power loss is a symptom of sumping no?

Very interesting.

 

More heat. The higher flow rate of the oil moves heat from the engine more efficiently so long as that heat can dissipate at at least the same rate.

If a bike was just sitting and idling yes a higher flow oil system would in all likelihood result in that bike getting hotter faster.

The same principle applies to air. Does your bike run hotter in town at 25mph or on the interstate at 80mph? Why does the tuner point a big *** fan at your bike when it's on the dyno instead of just cracking a window? More flow, more heat moved.

 

Monitoring the engine temp on the street and doing a dyno pull are 2 separate things. My FXR put out 144/146 on the dyno I used but run it at 75 with ambient temps above 90F and it would sump until I replaced the Fueling Race pump with a SnS 3 rotor. Could feel it sumping on the street but not on the dyno.

 

Can I jump here and ask...Is it possible to test an oil pump to see if it is working properly, after the engine has been torn down? I ask this because my mechanic told I would need a new oil pump, but he had already tore apart the engine. How could he tell if he did not have the bike running and he was working on the top end?