Author Topic: TD oil supply line (Read 4194 times)

Oilheat · « **on:** June 13, 2007, 10:15:23 pm »

My Rabbit with AHU is on the road, and I'm putting together the parts to "upgrade" the turbo to a K24, might even try to make my own K24/26 hybrid.

I had always heard that there is supposed to be a restrictor in the oil supply line, to avoid flooding the turbo with oil and to help maintain oil pressure to the engine; but the K24 and its original supply line complete with fittings at both ends, is totally wide open.

Am I missing something, or some part?

Oilheat · « **Reply #1 on:** June 13, 2007, 11:33:37 pm »

A few people have posted with similar questions, but with no substantive replies.

The i.d. of the fittings on the oil filter mount and the turbo center section is the narrow point of the supply plumbing, at 6mm, or .240".

By contrast, ATP Turbo sells and recommends restrictor fittings for their ballbearing turbos of .035". and restrictor fittings for their T3 journal bearing turbos of .060".

Any suggestions?

jimfoo · « **Reply #2 on:** June 14, 2007, 09:09:08 am »

I had heard that the needed restriction was in the fitting or the turbo. The size probably depends on the specific turbo. A water cooled turbo will need less oil than one that isn't because then the oil flow needs to cool it. So you will need more oil than just what the bearings require.

Turbinepowered · « **Reply #3 on:** March 18, 2008, 08:46:20 pm »

Doing a little necroposting, but I'll be fabricating a supply line for a K03 to put on my 1.5TD and I'm trolling for some suggestions.

In essence I plan on bending up some solid hydraulic tube and using flare fittings on each end. I can get it all fairly cheaply from the local hydraulic shop, so what size line should I go for? 1/4" line? Inner/outer diameter?

burn_your_money · « **Reply #4 on:** March 18, 2008, 09:36:26 pm »

want me cut up my AAZ line and get the ID?

Turbinepowered · « **Reply #5 on:** March 18, 2008, 09:42:26 pm »

Quote from: "burn_your_money"

want me cut up my AAZ line and get the ID?

If it's already dead, sure, but don't cut up a salvageable line just for my benefit! :shock:

burn_your_money · « **Reply #6 on:** March 18, 2008, 09:57:31 pm »

it could be used.. but no one wants to buy it and it's taking up precious space. I'll see what I can do tomorrow... oh wait, class tomorrow not shop. I'll try and remember for thursday

jimfoo · « **Reply #7 on:** March 18, 2008, 10:13:37 pm »

The line ID on my AAZ is way bigger than the restrictor in my VNT, FYI.

stewardc · « **Reply #8 on:** March 19, 2008, 04:30:16 am »

The drain line is huge compared to the pressure supply line. With that in mind, I suspect that the restriction is built into my T-3, as the turbo is not meant to be pressurized, but simply sprayed with oil. It then drains freely away.
Does that sound about right?

Turbinepowered · « **Reply #9 on:** March 20, 2008, 09:29:44 pm »

Quote from: "burn_your_money"

it could be used.. but no one wants to buy it and it's taking up precious space. I'll see what I can do tomorrow... oh wait, class tomorrow not shop. I'll try and remember for thursday

Any word?

Author Topic: TD oil supply line (Read 4194 times)

stewardc