oil restrictor

[ty92dsm]

I am trying to find an oil restrictor for my hx35 install but can't seem to find the right thiing. I read on the "clints garage hx35 install" that he bought a .075 restritor on ebay but I can't find one of those. If you guys could help me find what I'm looking for that would be great!!!

 

[JusMX141]

Have you checked your oil pressure yet? You may not need one at all.

Restrictors are definitely NOT something you want to use just because someone else is running one. You absolutely need to know what your oil pressure is so you can apply the correct restriction.

 

[forcefed86]

After the balance shaft removal my oil pressure at the head met holsets minimum pressures. Right at 20-22 idle and 40’s at rpm. I have since ported the oil relief chamber and changed heads. I have not checked it again. It’s on the “to-do” list.

8. Normal oil temperature is 95+/-5°C (203+/-9° F). It should not exceed 120°C (248°F) under any operating condition.
9. Any pre-lube oil must be clean and meet the minimum CD classification.
10. The orientation of turbine housing, bearing housing and compressor cover is fixed according to application. During installation, do not attempt to rotate these components. Inclined turbocharger installation is not recommended. If an installed angle is necessary, oil inlet centreline must be +/- 10 degrees from vertical and rotor centreline +/- 5 degrees from horizontal.
11. Holset permits oil return pipes to decline at an overall angle of not less than 30 degrees below horizontal.All turbocharger applications require a pipe of internal diameter greater than 19 mm which has integrated connectors. To ensure oil returns into the engine under all operating conditions, the return connection into the engine sump must not be submerged and the outlet flange of the turbocharger must be 50 mm above the maximum oil level of the engine sump pan. Crankcase pressure should be limited ideally to 0.8 kPa (0.12 lbf/in2) but 1.4 kPa (0.20 lbf/in2) can be accepted by reference to Holset.
12. Oil pressure of 150 kPa (20 lbf/in2) must show at the oil inlet within 3 - 4 seconds of engine firing to prevent damage to turbocharger bearing system. A flexible supply pipe is recommended.
13. The minimum oil pressure when the engine is on load must be 210 kPa (30 lbf/in2). Maximum permissible operating pressure is 500 kPa (72 lbf/in2) although 600 kPa (88 lbf/in2) is permitted during cold start up. Under idling conditions pressure should not fall below 70 kPa (10 lbf/in2).
14. Recommended oil flows for the turbochargers are 2 litre/min at idle and 3 litre/min above maximum torque speed.

 

[ty92dsm]

Thanks for the replies. I have not yet checked the oil pressure I am just now putting the motor back together. I guess from what I have read it seemed like almost everyone runs an inline restrictor but I stand corrected. I guess I will have to see once I get it together

 

[red1993gsallmt]

If you need a restrictor you can do what I did, its really simple. Take the oil feed fitting for the turbo and tap a thread into the hole that the oil flows through so you can put a little allen set screw into it. Drill the set screw to the size restrictor you want. The good thing about doing it this way instead of welding it shut like some do is if you want to go smaller with the restrictor, you just take that set screw out and put another 3 cent set screw in and drill it smaller instead of having to order another an fitting Also, listen to Justin. He helped me chose a restrictor size and my turbo is still like new after 15,000mi+ when some guys cant get them to last for 500mi. And remember the drain is just as important as the supply.

http://www.sr20-forum.com/forced-induction-turbo/2357-how-make-oil-restrictor-less-then-10-a.html

 

[ty92dsm]

Thanks man, but if i was to do it that way, how are you supposed to check oil pressure after the OFH and before the turbo?