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Old 10-19-2004, 04:59 PM   #1
dug-e-fresh
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Default Oil Cooler Location and Need for Oil Cooled Only Turbos

I found a nifty little oil cooler thats pretty cheap too.



Now that I have went frontmount, my STi scoop doesn't do much but probably produce drag. Also, now that I am going with an oil cooled only turbo I had an interesting idea.

Take this oil cooler, mount it under the hoodscoop... perhaps just in front of the AC lines, then route the turbo oil supply line to the cooler... then to the turbo essentially insuring nice cool oil is getting to the turbo.

I then could tap into the outlet side of the oil cooler (going to the turbo) and run a line to my oil pressure gauge... I'd also always know that my turbo was getting a good supply of oil.

This would also yeild a slightly larger volume of oil for the internals.

Any thoughts? Problems?

def
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Old 10-19-2004, 05:08 PM   #2
kedrin
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whered u get it?

sounds like a damn good idea if it fits. heck maybe you could even use the stock top mount bracket to hold it in place somehow?
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Old 10-19-2004, 05:23 PM   #3
dug-e-fresh
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Default

It should definitely fit. I was thinking the same in regard to the bracket... but theres really alot of ways to mount this if you use your imagination

I found it on eBay. Current starting price, $89.99.

def
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Old 10-19-2004, 05:28 PM   #4
jaxscuby
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OMGHi2U

pegasus racing also sells them too for the same price.
and has all the braided lines to boot.

this where i am getting my pieces parts for my oil cooler.
thermostat, cooler, lines, dual filter relocator..reminds
me of my porsche's oil system, but no dry sump..

you would have to get creative with support brackets
mounted to the bottom side of the hood, where your
original splitter and hood scoop bolt to.

or

you could mount it in fender outside engine bay heat.
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Old 10-19-2004, 05:53 PM   #5
dug-e-fresh
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Quote:
Originally Posted by jaxscuby
pegasus racing also sells them too for the same price.
and has all the braided lines to boot.

this where i am getting my pieces parts for my oil cooler.
thermostat, cooler, lines, dual filter relocator..reminds
me of my porsche's oil system, but no dry sump..

you would have to get creative with support brackets
mounted to the bottom side of the hood, where your
original splitter and hood scoop bolt to.

or

you could mount it in fender outside engine bay heat.
Cool, I'll have to check them out.

For me, I just wanna keep it simple.

It seems that by using the turbo oil supply line as the source you can eliminate the potential kinking of the line when installing/removing a turbo, minmize the amount of additional plumbing needed for installing the cooler, and take advantage of the large supply of fresh air when moving... making the scoop functional again.

Coming up with a stable mounting system and location should be a breeze, just a matter of getting all the proper fittings and such.

def
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Old 10-19-2004, 06:04 PM   #6
cdvma
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With the cooler located above and before the turbo oil inlet, the turbo will probably be starved of oil pressure for a good amount of time during startup. In fact, it will probably be vacant of oil for a few seconds. Good idea an all, but it might do more harm than good. "If it aint broke dont fix it" also applies. Is your turbo getting oil thats too hot? I think your engine could use the oil cooler more if you race it at all.
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Old 10-19-2004, 06:29 PM   #7
dug-e-fresh
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Quote:
Originally Posted by cdvma
With the cooler located above and before the turbo oil inlet, the turbo will probably be starved of oil pressure for a good amount of time during startup. In fact, it will probably be vacant of oil for a few seconds. Good idea an all, but it might do more harm than good. "If it aint broke dont fix it" also applies. Is your turbo getting oil thats too hot? I think your engine could use the oil cooler more if you race it at all.
I thought about the pressure drop and starvation, it would really depend how it was mounted.

If the set-up were to be mounted fittings up, then I don't really see an oil starvation problem. However if there were mounted fittings facing down, gravity would empty the cooler itself and upon start-up could cause a problem. By up/down, even a slight pitch either way could make a drastic difference.

Yea, I see the "aint broke, dont fix" way of looking at it. But, if I can keep it from breaking for a longer time... why not? Cooler oil (and more of it) is only good for the engine in general... and this would help both out.

I mean STi makes an oil cooler, right? So in terms of competition, theres a benefit in their eyes. I am not sure where they connect it however, which could make all the difference in the world.

def
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Old 10-19-2004, 06:51 PM   #8
cdvma
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Fittings up might work. The feed line would drain out, but if you dont make it too much longer than the stock one, you will only starve it for an additional 2 or 3 seconds (best guess). I'm not enough of a turbo expert to know if that will be unhealthy. The STi cooler mounts close to the filter doesn't it? Oil cooling is definitely beneficial on a car that sees high loads, but I also have a feeling that you are much better off worried about cooling the bottom end of the engine than the CHRA of the turbo.

Another thought, is that it will not be attached to a thermostat the way you have it setup. That will make bringing the oil up to operating temperature a long process (especially in colder weather). I looked into building an oil cooler for my car using a sandwich oil filter adaptor or relocator and a thermostat is a crucial part. I'm wondering if anyone can answer with authority where the turbo oil feed draws from in terms of "how far from the cool oil in the pan"? If its got a dedicated line in the head that doesn't already go through other parts of the engine, a normal oil cooler will do the job you are looking at but simplified as well as tried and true.
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