Oil cooler before the turbo?

[smokehouse_83]

I have an oil cooler out of my starion and I was wondering if I routed the oil to it then back to the turbo if there would be any problems with starving the turbo of oil because of not having enough oil pressure to push all that oil? I think that cooling the oil before it entered the turbo would help keep the turbo cool thus helping with life expectancy of the turbo.

Drew

 

[BryanK]

Sounds like a pretty good idea... but I have no answers for you. You might try calling up APG or FP and talking to them about it for a little while. Thats about the only thing I can tell ya.
BryanK

 

[Suparata]

What exactly do you have in mind?
Do you want to install an external oil cooler or what?

 

[BUCK]

The oil leaving the Turbo has to be the hottest oil in the car - I always thought it would be best to put one AFTER the Turbo - & yes you would n't want to restrict flow thru the Turbo for damn sure - it would sit there & cook so it would have to be a rather low restriction oil cooler.

 

[smokehouse_83]

I would make the SS oil feed line but run it to an oil cooler some where (like where the foglight goes in the drivers side) then back to the turbo. I would use an oil cooler off of a starion which is like a small radiator or tranny cooler or I think like the 90 dsm oil cooler. I would want to do it preturbo cause cooler oil is better for the turbo, who cares about the oil coming out. The only thing I am worried about is this setup lowering the oil pressure of the system and starving the turbo, if this is not an issue I am going to do it.

Drew

 

[Tevenor]

What's wrong with your stock oil cooler?

 

[Suparata]

Why don't you just install a good quality external engine oil cooler which not only will benefit your turbo but the whole engine.
It is sad that all vendors have everything to make your car fast but they don't have something that's very important that will actually make you car last ("hold up "for guys who don't understand) .
It isn't easy to do it nor cheap but I think it should be mandatory.
I congratulate you on the fact that you are thinking to do something good too to your engine not only beat the s..t out of it.

 

[Tevenor]

You can install a good air to air oil cooler in place of the stock water-oil cooler, with AN fittings and SS braided hoses for $250 (if you don't have the right oil filter housing) or less if you do.

 

[BUCK]

My POST-TURBO cooler idea was based on the premise that oil is the hottest oil in the car & to cool it prior to dumping it in the sump would help the overall oil temps. DSM's plan makes sense - dump the hot post-turbo oil in the oil sump where the reservoir of oil mitigates some of the heat - some of which is sent to the oil cooler of course. A 90 oil cooler setup is supposed to be superior to the other 1G's which they say is pretty much another hand grenade. Our DSMTUNER Vendors have some nice aftermarket oil coolers.

 

[turboholic]

Originally posted by smokehouse_83
I have an oil cooler out of my starion and I was wondering if I routed the oil to it then back to the turbo if there would be any problems with starving the turbo of oil because of not having enough oil pressure to push all that oil? I think that cooling the oil before it entered the turbo would help keep the turbo cool thus helping with life expectancy of the turbo.

-I installed a small 2 line tranny cooler next to the power steering cooler on the turbo inlet line when I up-grade to big 16G 4 yrs ago, I'm getting oil from the oil filter housing. oil line , but since then, I have replace the water/oil cooler with a air cool cooler off a Nissan Z.

 

[smokehouse_83]

No one can answer my question or what. Is it going to mess up the oil pressure when I put a air/air oil cooler before the turbo? I dont care about the stock oil cooler I just want to cool the oil before it enters the turbo but not at the risk of starving it cause the oil cooler messes with the oil pressure. I actually have two oil coolers so I could put one after the turbo too since that one wont mess with the oil pressure will it. How much cooling effect do you think 3 oil coolers with have on the car?

Drew

 

[BUCK]

Here are my opinions...

[/B][/QUOTE]Originally posted by smokehouse_83 No one can answer my question or what. Is it going to mess up the oil pressure when I put a air/air oil cooler before the turbo?
No - any cooler of equal or larger pipe ID than the supply line should flow well enuff straight off a supply port to not have an adverse affect on the PSI of the oil leaving the cooler AND RETURNING to a size the same or smaller than the supply line.


I dont care about the stock oil cooler....
If you have a 91 or later stock water/oil cooler the general consensus is YOU SHOULD CARE - most of the gurus would tell you to change that first and THAT should be your first oil cooler upgrade priority - do some searches here & DSM.TALK & you'll see why - it crushes & puts water IN your oil - not cool!


[/B] . I just want to cool the oil before it enters the turbo but not at the risk of starving it cause the oil cooler messes with the oil pressure.
Think about it - the oil pressure relief valve is set for XPSI - it's a little regulator & will open & close it's little orifice to flow what's necessary to maintain XPSI thruout the system - AS LONG AS the pump can supply a flow rate sufficient to maintain a given PSI in a GIVEN SIZE pipe or orifice. Obviously that little pump can't supply the flow rate to maintain XPSI if you were flowing the oil in a 3 foot ID pipe & then into an unpressurized sump. Keep in mind that the Turbo oil supply circuit flows into the non-presurized sump - it should flow VERY well - it's going to the path of least resistance. The PRESSURE in that little circuit is constantly dropping as the oil get closer to the unpressurized sump.

BUT what if you had a relief valve before the sump? You could actually eventually fill a 3 foot ID pipe/cooler & pressurize it the same as the little supply line. You don't do that here because you'd blow the Turbo seals - that's why it flows straight to sump.


[I actually have two oil coolers so I could put one after the turbo too since that one wont mess with the oil pressure will it.
Once again IMO after the turbo would make A LOT more sense - THAT'S WHERE THE HOT OIL IS - it's a closed circuit so when you take heat out anywhere in the loop it should do good everywhere but IMO to take heat out of the oil IMMEDIATELY past the source (that freaking hot ass Turbo) makes the most sense (see my posts).


How much cooling effect do you think 3 oil coolers with have on the car?
A lot IMO but you'll never get the oil temps down as low as the water temps (you'd need an oil pump BIGGER than your water pump & an oil cooler BIGGER than your radiator to do that).


IN SUMMATION: take that FIRST oil cooler & replace your water/oil cooler with it & put the other cooler AFTER the Turbo

Love, Uncle BUCK

 

[Suparata]

How much cooling effect do you think 3 oil coolers with have on the car?
A lot IMO but you'll never get the oil temps down as low as the water temps (you'd need an oil pump BIGGER than your water pump & an oil cooler BIGGER than your radiator to do that).


One of greatest Rally drivers of all times was preparing his car for a race and the team came to the conclusion that the best performance he can get is when the oil temp is 10*C higher than coolant.
So whatever our friend does , if he can achieve this , it would be OK.
Mitch.

 

[Defiant]

Originally posted by BUCK
The oil leaving the Turbo has to be the hottest oil in the car

Hm... is it? It's already a watercooled housing- I'd not be surprised to find the oil near the exhaust valves, or under the pistons runs hotter. There's a goodly amount of oil going to the turbine bearing, and it's not spending much time there picking up heat..... I just wonder.

 

[Razor_DSM]

How much cooling effect do you think 3 oil coolers with have on the car?
A lot IMO but you'll never get the oil temps down as low as the water temps (you'd need an oil pump BIGGER than your water pump & an oil cooler BIGGER than your radiator to do that).


One of greatest Rally drivers of all times was preparing his car for a race and the team came to the conclusion that the best performance he can get is when the oil temp is 10*C higher than coolant.
So whatever our friend does , if he can achieve this , it would be OK.
Mitch.

hey can i get some more info and pics on that car, im just curious, there is no frontmount, ive seen another setup without one, but you would expect a rally racer to have one right ? water injection?

 

[Suparata]

Unfortunately I’m no longer a rally racer: now I’m just a rally “liker”.
It does have a FMIC.
http://www.engintecs.com/gallery/album21?page=1
Mitch