Oil Cooler - under engine lid? Options

[kenpolives]

Anyone have any good pics (and advice) on an aux. oil cooler (not in the front of the car) but either near the tranny or near the engine lid grill? My battery was relocated to the front so I have room.

[Jake Raby]

Adding a cooler under the decklid will help preheat the fan inlet air and will increase engine bay temps....

These are not good for cooling efficienct, simply because hot air doesn't do a vetu good job of cooling a hot engine..

Get that cooler under the vehicle, in the trunk or up front..

The Setrab cooler from aircooled.net is outstanding..

[AndrewBlyholder]

I think your answer depends a lot on what type of motor you're running and how much extra cooling you need.

15 years ago, I ran a stock 1.7 at PCA time trails with a cooler bolted to the underside of the engine lid. Also had a temperature gauge in the car, and while I don't remember what temps it ran now, it wasn't a problem.

I now run a stock 2.0 in my street car with the same cooler mounted to the underside of the trunk on the right side, just behind the axle. Fabricated a bracket to hold it at a +/-60 deg. angle so as to better catch the air swirling around below the engine. That setup has worked great for summer highway cruising, including stop and go traffic. Oil temp gauge in the car is the un-numbered kind, so don't know exact temps, but generally never goes past vertical. Give great pease of mind for summer driving. (Anyone know what the actual temperatures are for those un-numbered guages?)

But this is all with stock motors. Something wilder will take more serious cooling.

As a racer, I've never liked the idea of front mounted coolers. Most don't appreciate that they are big drag components. A fundamental of Nascar and F1 speed these days is minimizing their coolder areas to minimize their drag. I'd much rather put a larger cooler in the back beside the tranny. It will only be cooled by the turbulent and warm air coming around and under the engine, so it will be less efficient and therefore larger, but drag effects should be negligent. Extra weight doesn't increase with the square of your speed like drag does.

My 2 cents.

Andrew

[Dr Evil]

Here are some pirated pics

[Dr Evil]

The other

[Demick]

There's and article on Pelicanparts that a guy wrote up about how he did his cooler under the rear trunk. It has pictures so you can get an idea.

You can simplify what he did by using a Mocal thermostatic sandwich adapter between the oil filter and oil filter console. Then you only have to run oil lines directly from it to the cooler and back. If I recall, his setup had a spin-on adapter, remote oil filter mounting, and separate thermostat. That made for lots of extra stuff to mount and plumb.

Like has already been pointed out, don't put the cooler under the engine lid.

Demick

[don9146]

Some pics of my setup are in this thread http://www.914world.com/bbs2/index.php?act...9874&hl=don9146

The engine is 2.7 with RS pistons and a solex cam. I only need to turn the oil cooler fan on iin stop and go traffic when it is 95°F out or on track days if it is warm.

[ninefourteener]

I bought my car like this, so I never questioned it.

I have an oil cooler sandwiched between the engine lid and the drain tray, connected with real braided hoses.

I've driven this car for HOURS on days where it was well over 90 degrees..... highways included. Never got above 1/2 the temp gauge.

I also have a cyl head temp gauge in my car, and that never got too hot either.

[Jake Raby]

My whole system is in the trunk..
Accusump, Setrab cooler, and two canton filters. I duct air through the cooler with outside air as the cooler is fully encapsulated in a shroud fed with two hoses. The air is roted out the rear and under the car..

[bondo]

Somewhat OT, but related.. That's where I plan to put my AC condenser (with fans). I'll use a GT style lid too. Won't affect cooling much as I'm going V8.

[McMark]

What about a NACA duct in the rear decklid plumbed through the trunk floor to a cooler mounted below? Might not be too bad. Hmm. Trekkor, you listening? As a bonus, when it's raining, you have water cooling! (IMG:http://www.914world.com/bbs2/html/emoticons/lol2.gif) The hardest part would be making it so you can still open the trunk lid and even moreso, making it so you could still stow the top. (IMG:http://www.914world.com/bbs2/html/emoticons/idea.gif) hmmm. hmmm. hmmm.

[Demick]

Ratheer than the NACA duct through the rear trunk lid idea, here is what I would do:

Mount the cooler to the underside of the rear trunk with a hole in the rear trunk above the cooler. Put a fan under the cooler sucking air through it. Then cut a hole in the firewall between the engine compartment and rear trunk, and build a duct to get fresh air directly from the engine compartment to the fan. I'd guess the duct would be about 1" to 2" high and 8" or 10" wide.

Then run the fan at low speed anytime the engine is on to prevent air from being sucked backward through the cooler into the engine compartment. When the oil temp hits 180 or 200 or whatever, the fan goes to full speed.

Demick

[BMartin914]

Any chance you could post some pics of your cooler setup Jake? (IMG:http://www.914world.com/bbs2/html/emoticons/pray.gif)

[Mueller]

QUOTE (Demick @ Jan 19 2005, 06:32 PM)

Ratheer than the NACA duct through the rear trunk lid idea, here is what I would do: Mount the cooler to the underside of the rear trunk with a hole in the rear trunk above the cooler. Put a fan under the cooler sucking air through it. Then cut a hole in the firewall between the engine compartment and rear trunk, and build a duct to get fresh air directly from the engine compartment to the fan. I'd guess the duct would be about 1" to 2" high and 8" or 10" wide. Then run the fan at low speed anytime the engine is on to prevent air from being sucked backward through the cooler into the engine compartment. When the oil temp hits 180 or 200 or whatever, the fan goes to full speed. Demick

that might help lower the engine compartment temps as well???

[Dr Evil]

I beileve it was either Bern Bomb, or Bern Bros that did this set up

[Dr Evil]

pdsa

[Dr Evil]

oh ya

[Dr Evil]

wf

[ThinAir]

QUOTE (don9146 @ Jan 19 2005, 10:46 AM)

Some pics of my setup are in this thread http://www.914world.com/bbs2/index.php?act...9874&hl=don9146

What kind of cooler is that?

[Brando]

Anyone tried putting it in the front hood with a NACA duct?

when 924 GTS hood scoops attack...