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Holset oil restricter location

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sk8freak8989

10+ Year Contributor
46
0
Jan 28, 2010
sterling, Massachusetts
Im sorry if this has been covered already but i cant seem to find anything. I am going to be running a hx40 on my car and i am going to make sure the oiling system is perfect. I have chosen to run a restricter but i am not sure where to put it. I have seen people put the restricter right in the turbo and also down but the OFH. I have heard that the restricter causes a splash effect on the oil so when put into the turbo it can starve the turbo for oil. So where is the better place to put the restricter?

Thanks
 
Half way in the line is where FP puts it on the Evo turbos. Even though its a little more work that is where I would put it.
 
Location doesn't matter, as long as it's somewhere between the oil source and the turbo.

Also, be sure you check your pressure before restricting and use a restrictor that only restricts enough to get the pressure within spec or you'll wipe the turbo out in a hurry.
 
Ok thanks and that's what I'm going to do. I got a 12an drain and I still have balance shafts so hopefully I won't even need a restricter, but I got a fitting so i can t into the line to check the pressure, just to be sure.
 
Location doesn't matter, as long as it's somewhere between the oil source and the turbo.

Also, be sure you check your pressure before restricting and use a restrictor that only restricts enough to get the pressure within spec or you'll wipe the turbo out in a hurry.

Its location will actually have an effect on pressue and volume at the turbo. It's kind of counterintuitive, but the actual feed line acts as a restrictor itself. Pressure at the turbo will be lower with the restrictor at the ofh vs. having it at the turbo. For example, I had a 20psi drop across my feed line.

But anyway none of this matters, put a gauge at the turbo, after any restrictions, and make sure its 30-72psi at load.
 
Location doesn't matter, as long as it's somewhere between the oil source and the turbo.

Also, be sure you check your pressure before restricting and use a restrictor that only restricts enough to get the pressure within spec or you'll wipe the turbo out in a hurry.

True that! It took me a few hx40s to figure that out LOL.
 
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