DO NOT feed turbos from the head location

[stunt2]

this is the video I've recorded today. the car is evo IV, 2.3 engine, HX35 turbo. no balance shafts.
from the OFH the gauge reads 1.2-1.5 bar at warm idle and ~7 bar at higher revs
but look what I saw when I hooked up the gauge to the head, where I feed holset from

p.s. the sound of the video is crappy, but the engine was running all the time during the filming

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[Roberti 2G]

A lot of stock framed turbos such as the 14b,16g variants EVO turbos all feed from the head from the factory.

 

[JusMX141]

A very blanket statement that absolutely does NOT apply to every brand of turbo ever produced for sure. Also, your oil pressure at the head may be far different from someone else, and theirs may be different than the first two.

At least you're checking pressure- you should always know and understand the oiling requirements for whatever aftermarket turbo you're running then check the pressure in the line to verify it's receiving adequate operating pressure.

 

[stunt2]

yes the title is a bit missleading, my bad. wanted to say do not feed aftermarket turbos from the had without checking the pressure

p.s. how can I know if I've done any damage to the turbo ?
boosted it only once, but have driven nearly 200 miles without boosting

 

[northernawd]

Check for shaft play

 

[RipperXX]

Didn't watch the video, and the above members have already pointed out what I was going to mention, except, isn't 7 bar a bit much in higher revs? I mean that is 102.9psi, and I can't recall every hearing of a turbo needing THAT much oil pressure even when she's screaming. But I haven't looked up the operating range for a Holset either, if you know it please go ahead and post it up, im curious now.

 

[pacn91]

just because im curious too, i would like to know. Its been a while since reading, but i could swear that i read a thread that recommended 75psi max for holset?

 

[Phantom DSM]

Regardless, that holset should not have been fed from the head. Feed it from the ofh with a specific restrictor( icant recall .070??) to limit max at 75ish as stated above^^
Most factory Mitsu turbos we have seen are fed from head, and not to mention ball bearing turbos with a slight restrictor are fed from the head easier.
Its great to see that you are monitoring pressure with gauge since pressure fluctuates with different motor setup, age, balance shafts,etc. I need to do that...