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Turbo oil feed.
AndyW - 28/12/15 at 11:55 AM

Morning all,

Hope we all had a great Christmas.

Just starting my 2.0 blacktop turbo build and was after some advice as to where to take an oil feed from to feed the turbo? I have the return line sorted, just interested in where anyone has taken the feed from.

Thanks

Andy


big_wasa - 28/12/15 at 12:40 PM

There are two ways to do it.

Take a T from the low oil pressure switch.

Or how Ford did the Focus Rs.

There is a second blanking plug on the back of the block left of the low oil pressure switch. It's the same 1/4 npt fitting. Ford used a 1/4npt to m10 adapter. You can buy a

1/4npt to m10 adapter on eBay.
1/4npt to m12 adapter on eBay.

eBay ItemeBay Item

[Edited on 28/12/15 by big_wasa]


coozer - 28/12/15 at 01:01 PM

I've already decided on the oil feed like wasa.

But, got any pics of the return to block? Interested to see how you've done that.

Cheers,
Steve


AndyW - 28/12/15 at 01:30 PM

quote:
Originally posted by coozer
I've already decided on the oil feed like wasa.

But, got any pics of the return to block? Interested to see how you've done that.

Cheers,
Steve


Having looked again and now clocked the turbo to correct set up, my plan was to run the return onto the blocked off breather plate, but that is now higher than the bottom of the turbo, so will probably drill and tap into upper sump.

Will have another close look later and get back to you.


madteg - 28/12/15 at 02:18 PM

Are you going to fit a restrictor or run full glow to it.


coozer - 28/12/15 at 04:18 PM

You need a restrictor to stop it blowing past the seals dont ya???


AndyW - 28/12/15 at 04:29 PM

Pretty sure the restrictor is in the oil inlet on my turbo. Will check.


big_wasa - 28/12/15 at 05:34 PM

Yeh I am sure the banjo in my td04 is restricted to around 1mm.


CosKev3 - 28/12/15 at 07:46 PM

Oil returns from turbos should be below the normal oil level in the sump ideally,as if they are above the oil level crank case pressure can restrict the return of the oil from the turbo and cause issues with your turbo bearings/seals.


coozer - 28/12/15 at 08:39 PM

Ifnthe return is below the oil level would that not cause problems with surge in corners etc??


CosKev3 - 28/12/15 at 08:59 PM

quote:
Originally posted by coozer
Ifnthe return is below the oil level would that not cause problems with surge in corners etc??


I doubt the bore of the oil return pipe would be big enough to be affected by surge?


coozer - 28/12/15 at 10:14 PM

Surely if your breather system is pants it doesn't make any difference? Pressure on the oil pushes it down and up the pipe.. Gas pressure up the return will not hinder a dribble of oil as long as the return pipe is a good diameter.


sdh2903 - 28/12/15 at 10:24 PM

I was under the impression the turbo oil drain should be just above the level of oil. The drain oil pressure from the turbo is very low and any restriction will cause issues. Well that's what I'm planning on my mx5 turbo build as that's how most do it. Either into the sump above oil or in through the dipstick hole.

Happy to be proven wrong tho.


coozer - 28/12/15 at 10:35 PM

quote:
Originally posted by sdh2903
I was under the impression the turbo oil drain should be just above the level of oil. The drain oil pressure from the turbo is very low and any restriction will cause issues. Well that's what I'm planning on my mx5 turbo build as that's how most do it. Either into the sump above oil or in through the dipstick hole.

Happy to be proven wrong tho.


I'm with you. The more I Google it the more inconclusive it becomes. But the more I think about it going back above the oil level makes more sense.

Originally I was going to ask if the return should be pointing down inside the sump to stop it going onto the crank!!


CosKev3 - 28/12/15 at 11:15 PM

Perhaps it just refers to big power Cosworth engines with lots of crank case pressure,as this was what I was running at the time.

Newer breather systems might not cause the crank case pressure problems.

quote:
Originally posted by sdh2903
I was under the impression the turbo oil drain should be just above the level of oil. The drain oil pressure from the turbo is very low and any restriction will cause issues. Well that's what I'm planning on my mx5 turbo build as that's how most do it. Either into the sump above oil or in through the dipstick hole.

Happy to be proven wrong tho.


The oil level will not be a restriction though,as the oil will always equalise the level as its liquid?