oil temp and rpms

In the new issue of "HOT BIKE" there is an article about the "feuling oil pump and cam plate". It shows how more oil flow can lower temps. It shows that a TC88 has lower temps at 4500 rpms than at 3400rpms in either form, with or without the new oil pump. After the new pump, the 88 went from 204 degrees at 3400rpms to 187 degrees at 4500 rpms. Without the new system, 244 degrees at 3400 rpms to 240 degrees at 4500 rpms, not has much difference but still a little cooler at 4500 rpms. Will some one please explain to me how a 88 will run cooler at 4500 rpms then at 3400 rpms?

Those were head temps, not oil, my bad. But the oil was still cooler my just a couple degrees at 4500 rpms. This was all done on a dyno, so could more fuel at 4500 rpms cause the motor to run cooler?

[frisco-rigid]

The tests being performed on a dyno mean very little, real time riding is ALL that counts...
Perhaps the Fueling pump is good, I dunno,, But I do know that oil coolers work and they work good...
The two main things that will bring your oil temp down is correct tuning and coolers...

The more oil you push through the cooler the engine will be. So I would believe at higher RPMs you are pushing more oil.

Yes, it makes sence that the more oil that gets pushed around the more heat it can remove. So at higher rpms the motor will run cooler, okay so why did we need a 6 speed? Maybe those new 96" motors will run cooler if 6th gear is saved for speeds above 80mph. Just a thought.

[frisco-rigid]

UM, Hello?? Higher RPM's == more heat, yes more oil volume but more heat,, there's no free lunch...
Remember these are "air-cooled" motors,, oil only barely assists...

Yeah. I know higher RPM's mean more explosions and a hotter engine. I just noticed when I run at high RPM's my oil temp seems to drop a little.

I guess thats the air thats blowing by the engine at 80 thats also helping out.

Dont the new motors spray the bottom of the piston skirt and cool em down pretty good? Now that I think a little I realize I do not know what I am thinking...

[47knuck]

Well, look at the source of the information - Hot Bike...gimme a break!

Those guys in that rag are in the biz to push advertisers products.

If I read it in American Iron I'd be more likely to believe it.

what o would be concerned on this report is the oil temp 244 degrees at 3400 rpm if I 'm not mistaken oil starts to break down at 250 fegrees. I think I would consider all options if I rode a twin cam.

Oil plays a significant part in cooling the TC88 engine, & others too, I'm sure. On my '04 Low Rider, I dropped engine oil temperatures significantly by installing H-D oil cooler. Makes sense to me that lower oil temperatures translate to lower engine temps as well. Likewise, a higher volume oil pump has to yield a positive benefit in terms of engine oil temps and overall engine temps; engines equipped w/oil coolers should see further temperature drops when equipped w/higher volume oil pumps. This all makes sense to me.

JB