Engine oil flow/pressure restriction

  • Context: Automotive 
  • Thread starter Thread starter katman1260
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    Engine Oil
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Discussion Overview

The discussion revolves around the installation of a turbo system on a motorcycle, specifically addressing concerns about oil pressure and flow restrictions in the oil delivery system. Participants explore the implications of using a main oil feed restrictor and its effects on the pressure and flow to various components, including the turbo and engine feeds.

Discussion Character

  • Technical explanation, Debate/contested

Main Points Raised

  • One participant describes a main oil feed restrictor with a diameter of 5.5mm, which feeds a 4.25mm turbo oil line and two 4mm feeds, claiming it has boosted oil pressure significantly.
  • Another participant requests a schematic to clarify the flow and restrictions in the system, indicating that the initial description lacks detail.
  • A participant mentions that a specific turbo model operates with about 15psi at idle for extended periods, possibly implying a standard for comparison.
  • Another participant expresses skepticism about how a restrictor can increase pressure and requests further clarification through a schematic.

Areas of Agreement / Disagreement

Participants have not reached a consensus on the effectiveness of the restrictor or its impact on the system. There are differing opinions on the need for additional information and clarification regarding the setup.

Contextual Notes

The discussion lacks detailed schematics and prior system performance data, which may limit the understanding of the modifications and their effects. The relationship between the restrictor size and overall system pressure and flow remains unclear.

katman1260
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Hello everyone, My first post was deleted by admin. Anyways, the question is back for those who have not read it.

I am installing a turbo system onto a motorcycle with an oil pressure range far too low for the turbo. I have develloped a restricter that has boosted the pressures to where they need to be but I have a question.

I have a main oil feed restrictor diameter of 5.5mm. It is feeding a 4.25mm turbo oil line as well as two other 4mm feeds. This restrictor has boosted oil pressure 500%. The 5.5mm inlet is fed from the oil pump, the 4mm outlets feed the engine, 4.25mm the turbo.

My question is, does the main 5.5mm feed diameter effect pressure/flow for outlet feed lines in a closed system? or does it just have to be larger than the other feed diameters?
see pic. Forgive the caveman drawing!

http://www.suzuki-katana.com/forums/oil500.jpg
 
Last edited by a moderator:
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160 views and no comments? I guess this is too easy for this board and you'all are board with the question. I'll wait, someone will take pitty on me.
 
Your post is too vague. A schematic would be most helpful. We don't need drawings of the physical part but something that shows where the flow goes and where the restrictions are would be helpful. I can't tell from your post exactly where the restrictors are in the system. Also, how is the system prior to modification?
 
The 280zx turbo lives with about 15psi at idle for hundreds of thousands of miles.
 
I'm not sure how a restrictor can boost pressure can you post a schematic of what you have.
 

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