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

[JustinMeier]

I have a 2.7 and the cooler was put in the trunk with an aux fan.. I can't keep the thing cool at all when temps are over 80, and forget traffic.

[mb911]

I posted this set-up done by Henry Schmidt of Supertec Performance a while back.
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.

I just talked to Henry the other day and he said he has one Just like this he would sell to me.. Looks cool

[socal1200r]

I don't know much about 914s, so I'm guessing the stock coolers, if they have one, are pretty piss poor in function?

To me, it makes no sense to mount an oil cooler anywhere near the engine compartment. Isn't the purpose to COOL the engine oil? At the very least, it should be positioned like the one a couple of posts above, with its own "grill" next to the back window. I doubt this area gets any air directed down onto it, but at least the heat has a place to go. I would think that if someone really wanted to cool their oil, they'd mount it up front like an intercooler and run the lines to the back, or even mount it like it's done on the green 914 but in the front trunk, where it'll be in the air flow.

If you REALLY wanted to cool it, and valued function over form, one could put a small scoop on the front trunk and mount the oil cooler directly underneath it. Think a small rise Subaru scoop (WRX?), styled like an STI scoop but not as tall. I know, blasphemous...but I'm sure it would function a lot better than a lot of these locations in this thread...

Since most oil coolers are rectangular in shape, a matching shape in a hood scoop should work quite nicely...

http://parts.glanzmann.com/p/Subaru__Impre...er=BingShopping

https://www.amazon.com/04-05-SUBARU-STYLE-C...=Wrx+Hood+Scoop


'Course one could also mount it on the inside of the rear fender, and use a vent piece like this, with the openings pointed towards the front, to force air thru the cooler as well.

https://www.amazon.com/dp/B01J0OZ1XM?psc=1


But if I were to tackle something like this, I think my first choice would be doing something like the cooler with its own grill behind the rear window, but putting it on the front hood somewhere instead. Next would be on the front hood, but with a small scoop. Third would be at the rear window, like the one pic shows. Last choice would be anywhere in or near the engine compartment.

[Mark Henry]

I don't know much about 914s, so I'm guessing the stock coolers, if they have one, are pretty piss poor in function?

In stock form, stock engines the coolers are fine, for the most part we are talking about bigger than stock engines or race cars.

If you REALLY wanted to cool it, and valued function over form, one could put a small scoop on the front trunk and mount the oil cooler directly underneath it. Think a small rise Subaru scoop (WRX?), styled like an STI scoop but not as tall. I know, blasphemous...but I'm sure it would function a lot better than a lot of these locations in this thread...

Since most oil coolers are rectangular in shape, a matching shape in a hood scoop should work quite nicely...

http://parts.glanzmann.com/p/Subaru__Impre...er=BingShopping

https://www.amazon.com/04-05-SUBARU-STYLE-C...=Wrx+Hood+Scoop

(IMG:style_emoticons/default/huh.gif) (IMG:style_emoticons/default/icon8.gif) (IMG:style_emoticons/default/barf.gif) (IMG:style_emoticons/default/icon8.gif) (IMG:style_emoticons/default/barf.gif) (IMG:style_emoticons/default/stromberg.gif) (IMG:style_emoticons/default/icon8.gif) (IMG:style_emoticons/default/barf.gif) (IMG:style_emoticons/default/stromberg.gif)

That's real rice (IMG:style_emoticons/default/lol-2.gif) (IMG:style_emoticons/default/laugh.gif) (IMG:style_emoticons/default/av-943.gif)

Sorry the whole reason guys don't want a front cooler is because the "best" way to do this is cutting a big hole into the front of the chassis and of bottom of the trunk, mods you can't even see from the outside when done.
A good number of us hate to drill even a single hole into our cars. (IMG:style_emoticons/default/shades.gif)

[SixerJ]

I like the idea of a rear cooler on the grounds of clean lines, but far from convinced in its effectiveness in comparison to traditional front mount. The factory had lots of experience with what was effective and what was not

If you are going to do a front cooler don't do what my cars PO did and cut a hole in the front then vent out the hood without a well fitting ducting solution

A) it looks (IMG:style_emoticons/default/barf.gif)
B) when traveling at speed, hood hinges cut through windscreen slam panels really well once the hood goes

(IMG:style_emoticons/default/blowup.gif)

[sjhenry1075]

At what point do you need to think about adding an extra cooler? At what displacement is the stock cooling system no longer effective? I know a lot of it depends on driving, but minus any sort of racing, is there a standard for when to add an extra cooler?

[MoveQik]

I've been running this set up on my 3.2 since 2006 with no issues. I like to think Arizona is a pretty good test bed for cooling needs.

Excuse the mess....this was pre-paint/detailing. (IMG:style_emoticons/default/FERG.gif)

[JmuRiz]

Good to know, I have the same cooler, going to mock-up that location when I plan mine out. How are your lines routed, and what's your thermostat set for...that may have something to do with it too.

[6freak]

I have a 2.7 and the cooler was put in the trunk with an aux fan.. I can't keep the thing cool at all when temps are over 80, and forget traffic.

how do you get airflow if its in the back boot, im assuming its the back...

(IMG:style_emoticons/default/smile.gif)

[BeatNavy]

At what point do you need to think about adding an extra cooler? At what displacement is the stock cooling system no longer effective? I know a lot of it depends on driving, but minus any sort of racing, is there a standard for when to add an extra cooler?

To this question, I think most well-built/tuned 2056's are probably fine with the stock oil cooler. That's what I have, and temps get to 220, but that's about it. I've looked into building/buying a 2270 at some point, and based on the reading I've done I'll definitely need an external oil cooler at that point. May not have to be front-mounted, but something external will be required.

[stugray]

I installed mine in the front headlight buckets behind the foglight holes.

http://www.914world.com/bbs2/index.php?sho...6102&st=240

This is a pic before the vents and duct to dump out the wheel well was done, but you get the idea.

(IMG:http://www.914world.com/bbs2/uploads_offsite/i366.photobucket.com-10819-1389661344.5.jpg)

Now that the car is done, you cant even tell they are there.
And there would be room to keep the headlights if I wanted to.
One of the two coolers has a fan, but I havent even had to use it yet, even during a race

[Dave_Darling]

At what point do you need to think about adding an extra cooler?

When your oil temps are too high, of course!

There isn't any single displacement or power level that requires a cooler, it varies from case to case.

--DD

[JustinMeier]

I have a 2.7 and the cooler was put in the trunk with an aux fan.. I can't keep the thing cool at all when temps are over 80, and forget traffic.

how do you get airflow if its in the back boot, im assuming its the back...

(IMG:style_emoticons/default/smile.gif)

Exactly!!!!
Why it got put there is beyond me. However, I could use the holes where the cups for the top are to pull in fresh air from the grill. This of course means that I wouldn't be able to store the top in the trunk. Hope that makes sense.