Rear Mounted Auxiliary Oil Cooler, An alternative to the front mounted unit Options

[earossi]

I can't locate the post; but someone was asking about mounting the front auxiliary cooler for a 6/ conversion project. I had responded about an alternative that involves mounting a cooler and cooling fan in the engine bay of a 914. I have attached several pictures of such an installation. This was not my car; however, my installation was essentially the same as depicted in the attached photos.

The cooler and fan carried a price tag of less than $400. To install the cooler, you have to fabricate some brackets as shown in the pictures. You'll need to route 12 volts to the cooler which incorporates a thermostatic temperature switch to actuate the booster cooling fan when oil temperatures reach a predetermined point. You'll also have to fabricate two short jumper hoses to take suction from the engine mounted oil cooler.

There are a number of these installations out there, including the one in my car. Several are running down in Dallas and work well.

Installing this rear mounted cooler deletes the need for hoses to be routed to the front of the car, and for body modifications needed to mount an oil cooler in the front trunk. The cooler is available from Savage, or from any number of suppliers.

[Mark Henry]

I posted this set-up a while back done by Henry Schmidt of Supertec Performance .
He stated it brought temps down and didn't affect the cooling of the engine.
It was in an original /6 that the owner put a bigger engine in, but didn't want to cut up the car for a front mount cooler.
It's a modified RX-7 cooler.


(IMG:http://www.914world.com/bbs2/uploads_offsite/forums.pelicanparts.com-26-1292010763.1.jpg)
(IMG:http://www.914world.com/bbs2/uploads_offsite/forums.pelicanparts.com-26-1292010763.2.jpg)

[IronHillRestorations]

I've done three coolers under the rear trunk, sold two kits for the engine lid mount, and did one with the cooler in the right rear 1/4 panel below the sail panel.

I don't like the idea of pre-heating air going into the engine compartment, or oil lines going up to the lid.

The cooler in the 1/4 was the cleanest, but most difficult. It did require a stone shield for the cooler/fan sandwich.

For ease and least amount of trouble, I'd recommend under the trunk.

[Cairo94507]

If I had not done the GT front cooler set-up for my 3.2, and it killed me to have to cut open the front trunk to do that, I would have had to think long and hard about the alternative.

Maybe, in my little brain, the next best set-up would be in a rear quarter assuming you could fit an oil cooler in there and plumb it so it was as clean as if Porsche would have installed it and it got sufficient air flow.

[patssle]

http://imgur.com/a/6u4ew

[rudedude]

earossi,
How well does your cooler in that position work? What size motor and what oil temps do you run and in what ambient air temps?
Thanks

[Mark Henry]

I don't like the idea of pre-heating air going into the engine compartment, or oil lines going up to the lid.

Although I agree in principal you do have to look at the source of this mod, Supertec is one of the premier /6 engine builders in the country right now.
I'd kill for a Supertec crank and Pankle Ti rod set. (IMG:style_emoticons/default/pray.gif)

http://forums.pelicanparts.com/911-engine-...supercrank.html

Henry also stated that although it may not be the best solution, it did work and the customer didn't have to cut up his original /6. This was for a So Cal car.

[Elliot Cannon]

Here's mine. Fans work great when you're stuck in traffic but restrict the flow of air when they are not running. If you often find yourself in heavy bumper to bumper traffic, a fan might be a good idea though. However my next project will be a front mounted cooler. (IMG:style_emoticons/default/biggrin.gif) Mostly because I've just about run out of things to do to the car. (IMG:style_emoticons/default/laugh.gif)

[ClayPerrine]

Here are some pictures of the oil cooler on the current engine in my six. It is a 911 carrera cooler, mounted in front of the exhaust on the right rear of the car. One end is attached to the body side of the trans mount, the other end is bolted through the pinch weld. The cooler sits flat against the underside of the trunk, and the fan is on the front. Not the optimal location for the fan, but it works. The fan is wired to a relay that is controlled by the 911 thermal switch in the cooler. The power comes straight from the positive post on top of the starter.







It brought the oil temp down close to 50 degrees F. when I installed it.

Now I have to engineer another solution when I get the new motor and trans in the car.

[barefoot]

In the Lapuwali classic forum:

http://www.914world.com/bbs2/index.php?showtopic=108328

[SirAndy]

Just FYI, you can run a front cooler without cutting up the front trunk.
(IMG:style_emoticons/default/shades.gif)

[FourBlades]

I have a cooler with a fan mounted under my rear trunk with my 2270 /4. There are pictures somewhere in my Rocking 914 thread.

On the street it is fine.

At Sebring my engine oil temps would climb to 220 after 3 laps and keep going unless I just cruised every other lap.

The rear trunk without some cold air ducting (I have not tried this yet) is not enough for a track car where you are full throttle most of the time.

John

[JmuRiz]

Just FYI, you can run a front cooler without cutting up the front trunk.
(IMG:style_emoticons/default/shades.gif)

Is that with the under-bumper 'RSR' valence, or is there another way?

[Mark Henry]

Just FYI, you can run a front cooler without cutting up the front trunk.
(IMG:style_emoticons/default/shades.gif)

Is that with the under-bumper 'RSR' valence, or is there another way?

I think the two small coolers in the blank fog light grills.

[Cracker]

No matter the engine...I have tried in vain to do all kinds of whacko solutions to keep the cooling in the rear - it won't work on a real performance/race car.

Tony

[Mark Henry]

No matter the engine...I have tried in vain to do all kinds of whacko solutions to keep the cooling in the rear - it won't work on a real performance/race car.

Tony

Not everyone has a race car, as far as performance car goes (IMG:style_emoticons/default/bs.gif)

[Cracker]

Mark - Although I hadn't quoted FourBlades comment - I was piggy backing it.

Tony

No matter the engine...I have tried in vain to do all kinds of whacko solutions to keep the cooling in the rear - it won't work on a real performance/race car.

Tony

Not everyone has a race car, as far as performance car goes (IMG:style_emoticons/default/bs.gif)

[SirAndy]

Just FYI, you can run a front cooler without cutting up the front trunk.

Is that with the under-bumper 'RSR' valence, or is there another way?

You don't even need the valence, you can easily mount a cooler under the stock bumper.

I have a pic of a GT somewhere that did just that ...
(IMG:style_emoticons/default/shades.gif)

[Catorse]

No matter the engine...I have tried in vain to do all kinds of whacko solutions to keep the cooling in the rear - it won't work on a real performance/race car.

Tony

Exactly. If you want the best cooling available, the cooler must go in the front. period. end.

[porschetub]

Here's mine. Fans work great when you're stuck in traffic but restrict the flow of air when they are not running. If you often find yourself in heavy bumper to bumper traffic, a fan might be a good idea though. However my next project will be a front mounted cooler. (IMG:style_emoticons/default/biggrin.gif) Mostly because I've just about run out of things to do to the car. (IMG:style_emoticons/default/laugh.gif)

Isn't yours a 4,yes it is ,I think the cooler needs to be set up @ right angles to the truck floor to get flow,wouldn't the fan be working overtime if not mounted that way?
My cars already cut up front which is a pain I need a piece of panel to weld in,car originally was set up for a 3.0.