Turbo Oil Restrictors

[33SOM]

Hi all,

Currently have a tomei oil pump with (for now) standard turbos on my 32 gtr.

Should I have oil restrictors for the turbos? At the moment I'm getting a bit of blue smoke after idling for a while and on boost.

Cheers

[XGTRX]

Just went through similar shit, but a single. If you are using the stock oil feed lines on yhe twins, as far as I know, they have restrictors on the banjo fitting on the block, BUT you have to check ur oil pressure and make sure its not too much more than stock. I think on the tomei pump you can adjust the oil pressure if its too high.

Edited November 6, 2015 by XGTRX

[scotty nm35]

Quite often I have had to use multiple 1mm restrictors on single setups, it's common to overfeed the bearings/journals with oil and force it out the seals, especially if the drain is compromised. Grab some 34 restrictors and try them, as the 32 doesn't run them i'm pretty sure, but understand journal turbo's need a lot more oil supply than BB cores, you might have to drill the restrictors out a bit if they are journal bearing cores.

If you can lower the pressure externally as XGTRX mentioned it might be a lot easier than mucking around with the feed to the turbos.

[GTRPSI]

Set your oil pressure Via the Tomie pump according to your bearing clearances, oil weight and RPM limit for the engine internals to survive.

Then sort out your turbo oil feed restrictor.

Pointless lowering your oil pressure to suit your turbo feed if your running big bearing clearances and intend to rev to 9000......engine will just eat itself out internally if the engines oil pressure is not there at higher RPM's

The turbo oil feed rate is adjusted after you have sorted your engines working oil pressure.

[mr skidz]

I'm looking to restrict my factory oil lines to my bb turbos I heard the factory 1.2 millimetre is reduced to point eight millimetre with High volume oil pumps?

Does Earls or someone sell banjo bolts with smaller orifices.

Edited November 14, 2015 by mr skidz

[GTRPSI]

https://www.turbobygarrett.com/turbobygarrett/oil_restrictor

[mr skidz]

I've read all the information previously just wondering where I can find a banjo with maybe a point eight restriction in it will save me welding it up and drilling that's all

[scotty nm35]

What size and thread is it? The M35 Stagea runs 3 x 0.8mm restrictors stock.

[mr skidz]

What size and thread is it? The M35 Stagea runs 3 x 0.8mm restrictors stock.

no idea.

I'll have to check but good to know stagea might be an option.

[mr skidz]

Going for full oe factory look everywhere where possible it's harder to do but should be worth it in the end.

Edited November 15, 2015 by mr skidz

[mr skidz]

For the life of me I cannot find a .8mm restricted banjo bolt listed anywhere for the RB26.

Not even on eBay which is surprising.

#strugglestreet

Edited November 15, 2015 by mr skidz

[XGTRX]

Can't you get a restrictor pill.

[mr skidz]

I'm using the stock oil lines Gcg suggested gluing something inside the lines not a fan of glue

Edited November 16, 2015 by mr skidz

[89CAL]

Ive silver soldered the inside of the fitting then drilled it out to desired size . Bit less dodgy then gluing.

[mr skidz]

Ive silver soldered the inside of the fitting then drilled it out to desired size . Bit less dodgy then gluing.

definitely that's the go f**k glue, was just hoping to change a Bolt and be done.

I'm surprised there's nobody selling these things as I'm sure I'm not the first person to put ball bearing turbos on an RB with a big oil pump.

[XGTRX]

I think hypregear sell pills that you can just insert.

[mr skidz]

Is it true the R34 GTR has a 1.2mm restrictor on the blocks oil feed banjo bolt?

Apparently with an "m" on the bolt?

[scotty nm35]

Apparently, due to them being BB core they needed less oil flow. Order a couple from Amayama and check them out. Can't be too expensive.

[SkudR33]

Any automotive hose shop sells the pill restrictors - ie rocket industries, Motorsport connections, earls.

It was simply a drop in pill that had a small lip to hold it at the top of the hose fitting!

[mr skidz]

Absolutely, Just want to know whether nissan chose to restrict oil flow at the block via banjo on the 34's while garrett obviously fit them on the cartridge to be sure there restricted for warranty purposes.

The difference being 1x .8mm banjo restrictor at the block vs 2x .8mm restrictors at turbo cartridges.

Just wondering under pressure if both examples/ Turbo's would see identical oil flow being dictated by the smaller .8mm oriface @ the block.

For a high volume pump setup

Edited December 16, 2015 by mr skidz