hx35 on alh

[madmikeismad]

Is an oil restrictor needed? I'm pushing oil FAST out of the exhaust housing. I read that the tdi's run 80-100psi oil pressure, which would be 20-40psi more than the trucks this turbo came off of. I've also read the stock vnt15 had an integrated oil restrictor, is that true?

 

[HightechRedneck]

I would restrict it some.

 

[madmikeismad]

Yeah, tdiclub actually gave me some info. I need to try between .15 and .25 orifice. I'll try bigger first just in case. I guess the 3/8 line just allows way too much flow/pressure though.

My plan is to get a thin washer to stick in the oil feed in the turbo, and drill the hole out to .25, and hope the oil feed line will still turn in tight without leaking.

 

[12vriviera]

.15 should be plenty big for that turbo

 

[madmikeismad]

.15 should be plenty big for that turbo

Really? It just seems sooooo small lol. I'm afraid I'll go too small and then not know if it's enough until its too late.

You guys think my turbo is still good? Or will it need a new seal or bearing or whatever keeps the oil inside where it belongs?

 

[1-5-3-6-2-4]

So .25 is a quarter inch.

I can't even see that making a difference from 3/8".

 

[HightechRedneck]

They should make a .15 screw in orfice for that so you dm don't have to do washers and pray

 

[madmikeismad]

So .25 is a quarter inch.

I can't even see that making a difference from 3/8".

33% smaller right?

They should make a .15 screw in orfice for that so you dm don't have to do washers and pray

Where would you get that?

 

[1-5-3-6-2-4]

I would start with 1/8".

How I've built restrictive fittings in the past is. Measure the fitting ID on the bottom side. Correlate that over to an NPT or even straight thread size. Drill out the fitting for suitable tap size. Tap the ID for new threads. Install plug with internal hex drive with red or green lock tite. Zip cut bottom protrusion flush.

Now the hex drive will Center your drill bit. Drill through the plug with desired restriction size.

 

[madmikeismad]

Found a perfect little washer. I'll get pictures up in a minute. Measures .164 ID.

 

[madmikeismad]

 

[12vriviera]

Aslong as it still seals.. Looks good to me

 

[madmikeismad]

Yup still seals. Still blows my inexperienced mind that it will still flow enough. Lol

 

[madmikeismad]

Any chance oil flowing through will erode the washer? It is steel, but who knows the quality.

 

[12vriviera]

Shouldn't erode at all..

That gt42r coming your way, will be fed with like a .040 orifice..

 

[madmikeismad]

Shouldn't erode at all..

That gt42r coming your way, will be fed with like a .040 orifice..

Are you saying it's already in the turbo, or I'll need to install it? lol

.040? Like a pin hole?

 

[1-5-3-6-2-4]

Those are the type of restrictor fittings I build for hydraulic systems.

 

[madmikeismad]

So you could have built me a custom billet piece? lol

 

[crackerman]

Technically speaking, with a balanced journal bearing turbo, you COULD gravity feed oil through it. It just need some flow is all.

 

[madmikeismad]

Technically speaking, with a balanced journal bearing turbo, you COULD gravity feed oil through it. It just need some flow is all.

I thought a decent flow was really only required so the oil doesn't burn up?