Turbo oil return

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bmxwrx
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Joined: Sun Apr 05, 2009 8:17 pm

Turbo oil return

Post by bmxwrx »

Hey guys,

Any chance someone could tell me where the factory oil line returns to?

Is it in the block or in the sump?

Thanks :D
Paddles
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Re: Turbo oil return

Post by Paddles »

into the sump. just drill a hole and attach a piece of pipe to suit what ever size hose.

Paddles
'84 GL Scorp, Mildly Worked 2.6 With Sigma Turbo Setup.
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rx22nv
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Re: Turbo oil return

Post by rx22nv »

It was about half inch from memory? I've got a turbo sump here somewhere but I don't know where.

Bigger is better for turbo oil drains, just make it to match the turbo's drain pipe size.
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stealth
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Re: Turbo oil return

Post by stealth »

and make sure that its above the oil level
no lower than 52mm from bottom of block
cheers stealth 8-)
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mistashitty
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Re: Turbo oil return

Post by mistashitty »

I used a 90 deg. 25mm id galv. water pipe fitting (from the tip shop ) welded to flange plate, and punched a hole through the sump as close to the block as the flange would allow.
I then used some 6mm cork gasket material and some copper max ( and some 30mm roofing tek screws to hold it all on.)
I`d suggest you use the highest rated (temp/pressure) hose you can afford to hook the return line up as the oil leaving the turbo core can be extremly hot. I`v found hydraulic hose used in the earth moving industry is up more that upto the task but it can be a bit pricey.
And also buy 2 to 3 times more than what you "think" you`ll need.
Cheers and good luck.
G O T H E D A T !
bmxwrx
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Re: Turbo oil return

Post by bmxwrx »

Cheers guys.

Currently running a 5/8 hose to -10 fitting welded onto the sump.

52mm you say stealth? Its probably right on that. Hope its going to be ok.
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stealth
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Re: Turbo oil return

Post by stealth »

definatly no lower than 52mm thats the top of the oil in the sump!
you cant have ANY form of restriction for oil return will lead to early turbo
failure :(
cheers stealth 8-)
Engineering the unfair advantage !
Red bull , fuelling the fastest race cars on earth !
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DanTurboLancer
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Re: Turbo oil return

Post by DanTurboLancer »

You need to increase that bro!

The bigger the better
The more oil you have flowing away from your turbo means the better cooling!!!!
Pressure toward the turbo.
And flow away!!!

Yes definitely set the return in the sump, above the oil level. and if the boys set a specific height than stick to that....

Above the oil level means it can flow out without restriction or hassel about gettng the hot oil away from the turbo...
Last edited by DanTurboLancer on Sat Apr 11, 2009 11:35 am, edited 1 time in total.
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stealth
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Re: Turbo oil return

Post by stealth »

hey dude 5/8 is just under 16mm and will be fine
cheers stealth 8-)
Engineering the unfair advantage !
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DanTurboLancer
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Re: Turbo oil return

Post by DanTurboLancer »

stealth wrote:hey dude 5/8 is just under 16mm and will be fine
cheers stealth 8-)
Oh man 3am and a heap of beers lol Stealth is right, i had to press = after putting 5/8, then times it by 25.4....

LOL


Plenty big enough
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astron_on_boost
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Re: Turbo oil return

Post by astron_on_boost »

If it was to return into the oil, would it matter coz i would think that the engine would keep using the oil as it returns from the turbo so there shouldnt be a restriction on the oil flow. I have seen a car in the past where the oil returned back to the sump plug & the owner reckons he never had a problem coz the engine pumps the oil from the sump so the oil level should be the same?
Does this make sense?
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Sigmaproject
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Re: Turbo oil return

Post by Sigmaproject »

That couldnt work. The oil from the turbo is only flowing by gravity, not pressure , so it has to go to a point where it can just fall into the oil in the sump. If you ran it to the sump plug , the return line would just fill with oil and flood the centre housing and go out the exhaust as oil smoke.

This can also happen by just having too much crankcase pressure :cry:
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stealth
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Re: Turbo oil return

Post by stealth »

he is right and also if you oil feed is to much the housing will fill
cheers stealth 8-)
Engineering the unfair advantage !
Red bull , fuelling the fastest race cars on earth !
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Sigmaproject
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Re: Turbo oil return

Post by Sigmaproject »

Which brings us to the point, do we or dont we need an oil restrictor with the Garrett oil cooled CHRA. The stock oil delivery hole to the bearings is around 6mm. The thingy that is sold as a Garrett tubo oil restrictor has a hole around 1.6mm.
Big difference. I have a TR oil pump and no restictor and I dont have any problems with too much oil in the turbo.
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stealth
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Re: Turbo oil return

Post by stealth »

the KKK that i got can only take 2.8 litres per minute max!
cant remember what it is for a garrett
cheers stealth 8-)
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karl_2ltgc
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Re: Turbo oil return

Post by karl_2ltgc »

I got no restrictor and its running fine.
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