HX35

[Simonsaysr1]

Here recently, I've been trying to come up with a setup for my Holset, to make the drop in less of a headache. i have A AN10 fitting on the oil return line that came with the turbo, but i noticed it appears to have blown a oil seal. It has a ring of oil, found around the compressor wheel (Leading me to believe it might be not sufficient for the application). Now I've heard from half the people that AN10 is sufficient but I've also heard that AN12 is a must. what about if i round the sharp edges to smooth the flow of oil through the AN10 on there. Also what is everyone's opinion on needing an oil restrictor feeding from the OFH, I had plans to essentially port the AN10 and use the 2g drain tube cut in half on the oil pan, or should i remove the oil pan and weld on a AN male fitting?

 

[92AWDHX40]

Weld or not your choice . 10 or 12 the latter I'm using. A lot of information on the holset and draining on forum

 

[MorrisonFab]

We've used .075" for the restrictor off the OFH with no hiccups as well as quite a few locals with HX35s and HX40s.

AN is a little tricky when some of the ID of the components is smaller than the -10 or 5/8" size designation. Always preferred a 3/4" tube with an oil resistant hose over it and the pan drilled to 3/4" (off the car). The factory oil drain line flange can be safely drilled out to 3/4" as well and repurposed with a 3/4" nipple.
Crankcase ventilation can play a large part in whether the oil drains from the turbo efficiently or not. Something to Keep in mind

 

[kenuwine4g63]

Speaking on the comment made above, A restrictor is not a bad idea especially for a turbo fed from the ofh. Too much oil pressure can load up the bearings and also create too much pressure and blow seals out. I've done it. Journal bearing and Ball Bearing turbos should get restrictors, obviously not the same size restrictor though.

 

[Simonsaysr1]

We've used .075" for the restrictor off the OFH with no hiccups as well as quite a few locals with HX35s and HX40s.

AN is a little tricky when some of the ID of the components is smaller than the -10 or 5/8" size designation. Always preferred a 3/4" tube with an oil resistant hose over it and the pan drilled to 3/4" (off the car). The factory oil drain line flange can be safely drilled out to 3/4" as well and repurposed with a 3/4" nipple.
Crankcase ventilation can play a large part in whether the oil drains from the turbo efficiently or not. Something to Keep in mind

It's good to know that a factory oil return line can be bored out to 3/4 inches. The id of my AN fitting is definitely 5/8 measured with a micrometer.which seems small for the application.

 

[Simonsaysr1]

Speaking on the comment made above, A restrictor is not a bad idea especially for a turbo fed from the ofh. Too much oil pressure can load up the bearings and also create too much pressure and blow seals out. I've done it. Journal bearing and Ball Bearing turbos should get restrictors, obviously not the same size restrictor though.

Yeah I've heard both , if you use AN 12 that you don't need a restrictor, but if you go an10 you do need one, but then it goes back to what holset designed. But idk I've heard both that's why I posted this.

 

[Simonsaysr1]

Weld or not your choice . 10 or 12 the latter I'm using. A lot of information on the holset and draining on forum

There's information on both sides though , I've heard both being used on the forums. Spent a few hours looking around the forum but it always comes down to those two fittings and then the debate on oil restrictors as well.

 

[zedicus]

AN fittings for the drain is a terrible idea.

http://www.dsmtuners.com/threads/new-holset-drain-idea.512815/

 

[1990TSIAWDTALON]

No restrictor and drain it WELL and you won't have any problems.

 

[19gsx91]

^^ What Marty said.. and this is from Justin himself in a private conversation regarding the drain @JusMX141

"Nah you can just take a 2G drain, cut it about 1" above the flex, get a threaded flange for the bottom of the HY, put a 3/4" hose nipple in it, and join the two with a short piece of 3/4" silicone hose. Costs about $30 total."

And for the feed.. He said

"Filter housing for sure. They want as much oil as they can physically drain in the 35-65psi range. The OEM feeds are 6AN which is 3/8" just to give you an idea."

~Jus

I cannot offer any personal experience as I am still awaiting the arrival of my Holset.. but I have been asking that poor man a lot of questions regarding this.

 

[1990TSIAWDTALON]

And Justin is straight up about his turbo info. I feed mine WELL, 80-100 psi cold, 60-80 hot. With the big drain, the ONLY time I had a problem was when I kinked the drain line and didn't realize it. It only took starting it and letting it idle to no there was a problem. Once fixed, it is a "well oiled machine". That's all those turbo's really want, lots of oil and drain it well.