Hi guys after a few weeks of searching and emailing a few turbo manufacturers
and not getting the info I am looking for I am hoping you guys can help me out, My question is do i need a restrictor or not? my turbo is a big 16g mitsubishi the motor is a d16z6 the oil drain line is the greddy style that goes to the oil pan drain plug and the supply line is a standard braided steel supply line. what i notice is every now and then when i rev it threw the gears and then come to a redlight or stop sign it will huff out some oil smoke for a few seconds, now granted this has only happened twice to me and one person told me it may be the pcv valve sticking, but even after the valve was replaced it still did it that second time, the turbo is pretty new , it only has a few thousand miles on it tops. I was also told it may be from the return line since it goes to the drain plug rather then a bung welded in the pan. any advice , tips or ideas from you guys would be great. I am having the hardest time finding some one around my area who even understands what i am talking about.


Modified by boosted91crx at 7:56 PM 9/16/2007

 

Just bumping so it stays on the first page

 

you need a restrictor when your getting too much oil pressure going to the turbo, where it then proceeds to blow past the seals in your turbo, then you will have oil in your IC piping and downpipe.
also, your oil return going to the drain bolt isn't the most ideal setup because that could cause some resistance/backup of oil in the line, which could also cause the oil to blow past the seals. thats why most of the oil returns are tapped as high as possible on the oil pan.

oil restrictors FTW

 

got any idea where i can source a restrictor kit and maybe even a better drain line?

 

bump want 2 kno also!

 

If your running a wet floating type turbo with a -3AN line, the line if 32"+ will add enought restriction for a honda setup.

If running a -4AN, watch for oil to get past the seals, and don't mash the gas while the motor is still cold or you might have a bigger chance of putting oil past the seals.

I was told that the ball bearing type turbos have more delicate seals, and they need restrictors.

so, really for non-ballbearing turbos, do not use restrictor unless it blows by the seals because you may starve the bearings that require more lubrication

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JaredKaragen &raquo;</TD></TR><TR><TD CLASS="quote">so, really for non-ballbearing turbos, do not use restrictor unless it blows by the seals because you may starve the bearings that require more lubrication </TD></TR></TABLE>

 

god info thanks.

 

ask every egay turbo buyer if they ran a restrictor...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JaredKaragen &raquo;</TD></TR><TR><TD CLASS="quote">ask every egay turbo buyer if they ran a restrictor... </TD></TR></TABLE>

some of them blow anyways with or without

 

agreed But 99% of the people for the past few years advise a restrictor because of too many people blowing out seals with the honda's 100+PSI on cold start.

 

http://www.full-race.com/catal...5a77c



GT Oil Flow Restrictor
[0.050-GT-Restrictor] $24.99

Click to enlarge
Full Race now offers a oil feed flow restrictor for GT turbos. The precision machined orifice with in this restrictor precisely controls oil flow to the turbocharger.

Garrett's ball bearing design reduces the required amount of oil required to provide adequate lubrication. This lower oil volume reduces the chance for seal leakage. Also, the ball bearing is more tolerant of marginal lube conditions, and diminishes the possibility of turbocharger failure on engine shut down.

We highly recommend monitoring oil pressure prior to installing a restrictor. We also recommend monitoring pressure after the restrictor is installed.
Oil Restrictor Specifications:

7/16-24 inverted flare to #3 AN (3/16 37 degree flare)
Zinc coated steel
0.050 in. precision machined flow control orifice

 

good info here. So how are these installed?

 

Installed inbetween oil feel line and turbo.

 

i wouldnt recommend fitting an oil restrictor without ensuring how much oil pressure your engine is making! if your engine is burning oil you probably have oil blowing by the black box! do one thing to rule that out remove the hose going to the intake and plug the nipple/fitting on the intake to prevent a vac leak and see if the engine still burns oil at deccelration!

try to rule doubts out so you know exactly where to point the blame at!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IntegraTypeR &raquo;</TD></TR><TR><TD CLASS="quote">i wouldnt recommend fitting an oil restrictor without ensuring how much oil pressure your engine is making!
try to rule doubts out so you know exactly where to point the blame at!</TD></TR></TABLE>

Yessir. No point in doing that unless you know what specific turbo you're using, and the engine used. different Engines from different makes, have different oil pressures at the line.

 

atpturbo.com that's where I got mine.

 

You will know for sure if oil is getting past the seals (too much pressure) if you take off your chargepipe or intercooler and see oil puddled up or any residue. If your oil return line is not mostly verticle, or has some horizontal sections, it might be a problem also.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blueshark123 &raquo;</TD></TR><TR><TD CLASS="quote">atpturbo.com that's where I got mine.</TD></TR></TABLE>

ran the same one with not issues

-Zol

 

Ive been running a Function 7 oil resrictor on my T3 60-1 since the car was turbod almost two years ago without any issues.

 

Noob question! so excatly where does this fit to?

 

ok, some T3's have a threaded inlet, you can screw it in there, then attach a feed line to it.

or:

add it somewhere in the feed line.... it is just a rectrictor for oil feed pressure/volume.

Now; If you put the restrictor on too far away from the turbo, it will have an adverse effect and oil starve the turbo; especially when hot-starting the motor after the turbo has had some heatsoak time.

 

Thanks man, helpful info.