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Oil Restrictor In Banjo Bolts ...

Torques

By Torques,
in Engines & Forced Induction

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Torques Mentor

Torques

Posted
Posted

Hi,

I'm about the mount a hybrid turbo on my R33 GTST.

The turbo has journal bearings and I was told to use an unrestricted oil line.

The R33 oil-line has a ristrictor in it, so I got myself a new braided oil feed line.

However I noticed that the two oil feed banjo bolts are also restricted (somewhat larger holes compared to the oil feed line itself)

So do I have to replace the restricted banjos as well?

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Daleo Grand Master

Daleo

Posted
Posted

Hi,

I'm about the mount a hybrid turbo on my R33 GTST.

The turbo has journal bearings and I was told to use an unrestricted oil line.

The R33 oil-line has a ristrictor in it, so I got myself a new braided oil feed line.

However I noticed that the two oil feed banjo bolts are also restricted (somewhat larger holes compared to the oil feed line itself)

So do I have to replace the restricted banjos as well?

If the I.D. of the Banjo holes is larger than the I.D of the oil line you are fine.

You can always drill them out larger to suit, rather than buying new ones.

Torques Mentor

Torques

Posted
  • Author
Posted

The oil feed is 5mm, the banjo bolts about 1.2mm.

I have new banjo bolts (they came with the oil feed)

I'm just wondering if the open feed would be too large and

possibly lower oil pressure in the oil feed coming from the engine block.

(I have no idea if that internal oil feed goes further 'up') or how much

oil a journal bearing passes through ...

If the I.D. of the Banjo holes is larger than the I.D of the oil line you are fine.

You can always drill them out larger to suit, rather than buying new ones.

Torques Mentor

Torques

Posted
  • Author
Posted

I was now told to drill the banjos out to 3mm!

The oil feed is 5mm, the banjo bolts about 1.2mm.

I have new banjo bolts (they came with the oil feed)

I'm just wondering if the open feed would be too large and

possibly lower oil pressure in the oil feed coming from the engine block.

(I have no idea if that internal oil feed goes further 'up') or how much

oil a journal bearing passes through ...

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