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Old 10-15-2006, 07:14 PM   #1
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Default Can I run an oil restrictor on DSM T25?

I get some smoking from my exhaust from time to time and I am wondering if an oil restrictor would HARM anything. It may not be necessary but I would still like to try it for a while.
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Old 10-15-2006, 07:46 PM   #2
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I use them in every turbo system I am involved with. Never had a turbo failure or any smoking issues.
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Old 10-15-2006, 10:01 PM   #3
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I just found a good writeup on how to make one:
http://www.dsmtuners.com/forums/showthread.php?t=171317

But I think this is the ticket:
http://www.atpturbo.com/Merchant2/me...egory_Code=OIL

My CHRA is also from a DSM T25. I thought though that there really isn't any "pressure" in the oil... that on our engines it's a very slow flow based on where we tap for the oil source.

Is your valve breather line routed into the intake? Check that line to see if there's oil in there... maybe the source?
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Old 10-15-2006, 11:49 PM   #4
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I'm not sure about the oil in the intake but I will be building/buying a catch can in the next few weeks as well as installing a restrictor (just so happens to be the one you provided a link for). I want to cover all bases.

IMHO, it is probably about the same price to buy the ATP restrictor ($14) vs building your own like the DSM guy fabricated.
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Old 10-16-2006, 11:38 AM   #5
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I'm using a .060 restrictor w/the t3. I got it delivered for under $15. I've built a pvc catch can setup using 2" pvc parts, two 90 brass fittings, a straight brass fitting on the bottom with some clear vinyl hose plugged for draining and inspection. Used some black plastic primer and paint. It fits neatly behind the exhaust side headlight and appears to work well so far. The right angle fittings appear to work just fine for trapping the oil. Got out of tHD for under $15. - rob
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Old 10-16-2006, 11:44 AM   #6
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About 8 bucks delivered for this and just run a .060 drillbit through it (its brass and takes 2 seconds to drill larger).

http://www.wicksaircraft.com/catalog...a786ede7975089
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Old 10-16-2006, 11:45 AM   #7
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good find! Cheap as hell!
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Old 10-16-2006, 07:24 PM   #8
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umm this might be a dumb question, but why would you need this?

and more importantly do I need one for a 16g/1.6motor?
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Old 10-17-2006, 12:01 AM   #9
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No dumber than some I've asked. Read his first post, he's smoking occasionally and wonders if it might be because there's enough pressure in the oil feed that it's being forced past some of the turbo seals. Also check the link to the DSMTuners post... read the first paragraph in the post.
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Old 10-17-2006, 09:50 AM   #10
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I was considering running a pressure gauge after a restrictor to see the actual pressures. But I know at WOT my oil gauge goes off the charts.
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Old 10-17-2006, 02:01 PM   #11
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Quote:
Originally Posted by samnavy View Post
check the link to the DSMTuners post... read the first paragraph in the post.
interesting, is there any way to know or calculate before you install if you might need it? or is it needed based on the particular turbo/engine/setup?

I never thought it would be possible to over oil a turbo but if the pressure is high enough to be pumping more in than is draining it makes sense.
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Old 10-17-2006, 02:05 PM   #12
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It's talked about in Corky's book. I don't have it handy, but he does mention the use of a .060" restrictor in it. And testing the pressures and whatnot.


ok from Maximum Boost:

Idle, hot Min Pressure 5 PSI, Min Flow(Gal/min) 0.1
Maximum Load, Min Pressure 25 Min Flow 0.5.

They recomend a restrictor with dia .055-.065"


Since we idle at around 30psi, you can see why a lot of guys go with a restrictor, especially with -4AN lines over -3AN lines.

Last edited by Braineack; 10-17-2006 at 03:00 PM.
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Old 10-17-2006, 11:58 PM   #13
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ohhh thanks!
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Old 10-18-2006, 01:22 AM   #14
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Quote:
Originally Posted by m2cupcar View Post
I'm using a .060 restrictor w/the t3. I got it delivered for under $15. I've built a pvc catch can setup using 2" pvc parts, two 90 brass fittings, a straight brass fitting on the bottom with some clear vinyl hose plugged for draining and inspection. Used some black plastic primer and paint. It fits neatly behind the exhaust side headlight and appears to work well so far. The right angle fittings appear to work just fine for trapping the oil. Got out of tHD for under $15. - rob
You got some pics of that catch can?
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Old 10-18-2006, 09:52 AM   #15
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Quote:
Originally Posted by Wideopentuning View Post
I use them in every turbo system I am involved with. Never had a turbo failure or any smoking issues.

Need anything from ATP Turbo???? Contact me for 10% off!!

My Devils Own Water Injection Group Buy!!!!

https://www.miataturbo.net/forums/showthread.php?t=4912

Sick Miata Part www.flipsidecustoms.com
Darn I wish I had seen that BEFORE I spent $1,000 at ATP!

DB
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Old 10-18-2006, 11:51 AM   #16
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Diagram and pic of install. Very simple.
Attached Thumbnails
Can I run an oil restrictor on DSM T25?-hdcatchcan.gif   Can I run an oil restrictor on DSM T25?-catchcan.jpg  
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Old 10-18-2006, 05:34 PM   #17
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oh thats cool! Im going to make one just for fun now.
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Old 10-18-2006, 06:11 PM   #18
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Quote:
Originally Posted by samnavy View Post

Warning! Definitely don't buy one of these without checking to see if it is what you need. Got mine in the mail today - the threads are wrong and it is not a flare fitting. Wasted my money...
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Old 10-18-2006, 07:34 PM   #19
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Yeah, that's an NPT fitting...I bet your Mitsu. turbo is 10 or 12mm x 1.5 metric.
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Old 10-18-2006, 07:39 PM   #20
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Rob.....Pop it in and envelope and mail it to me. I will reimburse you.
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