External Oil Radiator

[Greg]

Has anyone done an external oil radiator?
Were there any problems with it?
Anything of note?

Thanks

Gregory Oden
Vandals Racing (http://www.uidaho.edu/~racing)
University of Idaho

[Greg]

Has anyone done an external oil radiator?
Were there any problems with it?
Anything of note?

Thanks

Gregory Oden
Vandals Racing (http://www.uidaho.edu/~racing)
University of Idaho

[Matthew]

U of Mn used one

things to think about -
where in the oil system it is (pressure side/ scavenge side)

airflow is more important than oil flow

is the air oil cooler heavier than the stock (motor cycle) one and how much oil (weight) does it add

also expense (if the oil cooler is part of your stock bike motor (like an R6) you dont have to add it into your cost report)

in considering non stock oil cooler - what problem/specification are you trying to sovle/meet?

-Matthew Hetler
hetl0020@umn.edu

[adam shortall]

Hi

Yeah we used one last year, it's pretty simple to do really, it's definally lighter than the stock oil cooler, but even the smallest oil cooler you can get cools the oil a bit too much, we put tap over 3/4 on the oil rad at the comp.
However the only way to know what cooling you need is to test it really.

[JamesWolak]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by adam shortall:
Hi

Yeah we used one last year, it's pretty simple to do really, it's definally lighter than the stock oil cooler, but even the smallest oil cooler you can get cools the oil a bit too much, we put tap over 3/4 on the oil rad at the comp.
However the only way to know what cooling you need is to test it really. </div></BLOCKQUOTE>

I don't know what motor you are running but the real question is the stock one a warmer or a cooler?

Oil temps rise much slower then coolant. OEMs want to warm the oil fast on start ups. I am sure this is even a bigger concern when it’s a motor revving to 14,000 and is constantly beat on.

We are currently running an air to air oil cooler (weight adder) and on the dyno when we have no air flow we are at about 170F.

Our coolant consistently gets over 200F on the track. Now tell me does stock system (F4i uses the 200F coolant to cool the 170F oil?

Rule of thumb with oil is that you should be under 212F (100C) and that’s a rule that can be broken. Especially with FSAE cars that are constantly getting there oil changed/leaked out.

[VFR750R]

I'd recommend an oil to water exchanger for the short run times these cars see. Like some others have said, cold oil is a bigger problem in fsae engines then hot oil. Several OEM coolers are available that do just that, and mount where the oil filter goes so packaging/plumbing is relatively easy depending on your setup.

Synthetic oil can be run at 220-240 all day long.

[kapps]

Yep. Oil needs to be run hot. I was told by a reputable source that 220 F was the sweet spot for a 350 chevy. Not exactly similar engines but useful nonetheless.

[adam shortall]

Well, i'll put it this way, we are seriously thinking about hot have any oil cooler, this year and just letting it cool in the sump.

[Wesley]

I don't know if you saw us in '07, but we were definitely running an oil warmer in that case.

http://fsae.com/groupee_common/emoticons/icon_biggrin.gif