[BRO]

Has anybody tried this? Seems like it would make the existing setup much more efficient at a much lower cost than the upgrade units. With a thermostat of course so it does not run when not needed.

[leftcoastman]

Uhhh my heat problems came about on the track. When you're averaging 60+ mph (140+ on the straights and 38mph in some corners) a little fan isn't going to help you much. In fact, you might get more airflow without a fan.

If you're putting along on the street or doing short 11-12 second bursts on the drag strip, you won't benefit from additional cooling, imo.

[midlife]

anyone running the car hard enough to worry about oil temp should just get the VK motor Oil Cooler upgrade.

my 2 cents

[BRO]

For the track of course. I have not heard of anyone having heating problems putting around town. Wheareas on the track EVERYONE is getting quite hot.

I am sure the VK unit is great, but you can buy a 250cfm fan at Digikey for $38 and get 100% of the fan's effort even in slow corners. Go fast and the fan will go faster.

Eyeballing the air ducting, it looks like if you used the entire front opening to send air to the oil cooler, rather than splitting it up to send a little tube towards the brakes, you would pick up some benefit. That brake duct looks too small to do much anyway.

Someone with fliud analysis software could calculate this or anyone could try it which I might. I just wondered if it had been done already.

[Mr. 5]

I cut out my grills to increase the flow to the oil cooler.
honestly, I saw my oil temp go down 5-10 degrees.

[O-cha]

I'm still surprised no one has made a stick on duct for the air dam the oil cooler gets it's air from, something you can use the bolts under the bumper to secure. I'm very sure something like that would drop temps.

[Miami Bimmer06]

Originally Posted by Mr. 5

I cut out my grills to increase the flow to the oil cooler.
honestly, I saw my oil temp go down 5-10 degrees.

Do you have pics of this?

[midlife]

Originally Posted by Mr. 5

I cut out my grills to increase the flow to the oil cooler.
honestly, I saw my oil temp go down 5-10 degrees.

are these the plastic grill on the inside of the wheel on the side that faces the tire??
if so, iassume this was done on the STOCK OC??

thanks

[midlife]

Originally Posted by BRO

For the track of course. I have not heard of anyone having heating problems putting around town. Wheareas on the track EVERYONE is getting quite hot.

i am at very high altitude.
my car even when stock with the stock OC my car ran hotter oil temps around town than i like.
granted i drive spirited, but my oil temps were unacceptable.
my guess is is the thinner air up here.

at the track, after 5 heated 2 minute laps, i almost limped and my oil temps hit
almost 300 degrees.

i put in the VK OC and curiously, my oil temps around town have not dropped that much only about 40 degrees or so.
have not taken it to the track, but i am curious about the oil temp improvement there.

my 2 cents

[bigbadbull]

the E60's Oil cooler is up front of the radiator and above the FMIC.I think this is a better location than the wheel well on the e90's. Only problem is that you can't add a better FMIC , unless you re locate it on the E60... so maybe it is not all that great.

[leftcoastman]

I've seen E60 535i go limp on track, so I don't that "rail" oil cooler works that well.

My thinking is that a fan, at high road speed, would impede airflow. The air has to spin the fan, too since the fan motor isn't fast enough to allow unimpeded airflow. Think "windmill".

If you're having issues with temp, don't dicker around (trust me, I've tried) and just get the VK Motorwerks oil cooler. Definitely a huuuuge difference on track.

[SfValley335i]

Originally Posted by Mr. 5

I cut out my grills to increase the flow to the oil cooler.
honestly, I saw my oil temp go down 5-10 degrees.

I wonder what the chances are of a rock being thrown around in the wheel well and tearing up that oil cooler...

[Azrielsc]

U mean something like this?

[BRO]

Yup.

How did it work?

[Tito335i]

Good idea i might need this !!! LOL

[Mr. 5]

Originally Posted by SfValley335i

I wonder what the chances are of a rock being thrown around in the wheel well and tearing up that oil cooler...

Wrong grill man.

[Mr. 5]

Here's what I did guys. Some don't like the look but I like it and it gets rid of all of the obstructions.

Yes, a rock and debris could get to the OC but it's not a direct shot so the chances of something destroying the OC is minimal.
The IC on the other hand is another story.
Everything that would hit that would be a direct shot.

[Rugs]

Originally Posted by Azrielsc

U mean something like this?

So what's the deal with you're fan, details would be appreciated.

[Mr. 5]

The only reason why I can see the fan working is if you're in a lot of stop and go traffic.
IMO, the fan will hurt the air going to the OC more at high speeds than help.

[Jeff335i]

The problem with adding a fan is that you will never get more airflow than the CFM rating of the fan, even when the speed of the vehicle would usually provide a higher flow.

Consider that an 18" electric radiator fan pulling 30 amps of current flows about 2300 cfm and is an impediment to flow above about 50 mph and what do you think a dinky little 6" fan is going to do to your airflow?

[BRO]

The CFM of a fan is not a constant! It is directly dependent on the pressure in front of and behind it. The fan's data sheet has curves of CFM versus back pressure.

Similarly the speed of air thru the stock cooler is not 50MPH because of obstructions creating back pressure.

I won't get into laminar versus turbulant airflow. Hopefully Azrielsc has some before and after temperatures he will share with us and end our speculation.

[Azrielsc]

I'm trying to get more information from the workshop that did this mod. Just snapped this photos of it being fixed onto another 335 whilst I was there.