HX35 Drain size

[Jordan]

I have a -10AN drain on my block installed already. The drain pipe that came with my Holset is larger than the -10AN. Will using it cause a back up of oil and lead to burning? Or will it be alright?

I was planning on getting a weld on -10AN fitting and cutting the Holset's drain pipe off and use a braided line of course.

Any help is great.

 

[WillettRun?]

Hmm, That might be alright. What size diameter hose is that? I believe the smallest I've ever ran on a holset is 3/4" hose (on a buddies car), 12an stuff on mine.

My hx52 is smoking under full throttle and repeated hard runs, I cannot tell if it's due to too much oil pressure, but I suspect it is seeing I have a -4 hose and no restriction.

 

[Steve-O740]

I don't think it should hurt it even a -10 is a decent size return line. However shouldn't the hx35 have a t3 style oil return set up on it. Cause I have one on my car and I used a -10 adapter fitting from my old t3 on it. Heres what it looks like

Hope this helps some if not feel free to ask I just did this on my car about a week ago

 

[Jordan]

Yeah it does, but I don't have that adapter, and I have the stock drain line for it which is a pipe with that drain flange. Doing the weld on AN fitting would let me use a little length of the pipe too maybe it'll put it in a better spot and it'll probably be cheaper than buying another one of those AN flanges like you have pictured.

I just don't want the drain to be too small and back up oil and cause me to smoke...

So you have a HX35 and used -10AN and it doesnt smoke or anything?

 

[Steve-O740]

The adapter was pretty cheap I think like 5 or 10 bucks on ebay so its not too bad. I haven't ran it yet cause I'm still building the car and trying to trouble shoot some electrical mishaps but when I had the turbo rebuilt I asked the guy about it and he said that a -10 should be fine for it as well as the -4 I'm using for the feed, and I tend to trust the guy seeing as how he and his dad used to design turbos for Garrett and he seems to know his stuff very well.

 

[Sir Psycho]

I use a -12 on my HE351. I was told that -10 would be fine when I was picking sizes though.

 

[Sir Psycho]

But most importantly is the ID of -10 smaller than the ID of the stock return?

 

[Jordan]

But most importantly is the ID of -10 smaller than the ID of the stock return?

Yes it is. But I am still using the -4 feed line... I used it on my last setup. I don't really see how it could change. Just cause the turbo is bigger doesn't mean my -4 AN is somehow going to pump more oil and there is going to be more oil to return.

 

[wennstroma]

Somebody on here found a datasheet from holset and they wanted a 19mm inside diameter on the drain, which is more like -12 an hose.

 

[Captain Bondo]

Yes it is. But I am still using the -4 feed line... I used it on my last setup. I don't really see how it could change. Just cause the turbo is bigger doesn't mean my -4 AN is somehow going to pump more oil and there is going to be more oil to return.

Sure it will change. The oil flow is determined by the bearings of the turbo. Larger turbo, larger bearings, more oil flow.

You really should use -12 on medium framed turbo's. HX/HY35 fall into that category. As was said, this is the size specified by the manufacturer.

 

[Jordan]

Sure it will change. The oil flow is determined by the bearings of the turbo. Larger turbo, larger bearings, more oil flow.

You really should use -12 on medium framed turbo's. HX/HY35 fall into that category. As was said, this is the size specified by the manufacturer.

Thank you. I appreciate advice from people that know better. I'll figure out what to do and get a -12 on there.