Jump to content
SAU Community

Recommended Posts

I am building an RB30/RB26 ad running a single turbo setup.. I have the series 1 block which does not have the oil feed in it for a turbo so was planning to take a feed from the oil pressure switch. What I noticed though is I think most the turbo takes a -4AN (1/4") bore fitting where as the oil switch is only 1/8"NPT Will I get sufficient oil for the turbo from here? Looking in side the turbo it seems the oil holes to the bearings are only very small but I want to be sure.. I guess I could open up the oil switch hole in the bock to take a larger fitting but only want to do that as a last resort as the engine is pretty much built and I don't want to risk getting metal swarf inside the gallery when drilling and tapping it out!

Advice please.

Thank you

Lee

The oil pressure sensor gallery is adequate to feed the turbo with enough oil. Just get the biggest ID size you can in there. The turbo (depending on type) should have the restrictor built in or at least run a restrictor smaller than 1/8th anyway...common restrictor sizing for ball bearing is 0.8-1.0mm and for journal bearing around 1.5-2.0mm...so both are much smaller than that feed line.

Hey man, Must picked thsi reply up! Thanks for the info.. I have a journal bearing turbo by the way.. I'll try and bore out the centre of the tee piece a bit to open it up some in that case and it should be sweet.

Cheers

Lee

With journal bearing turbos you have to be careful. They are the leas likely to have a restrictor in place. I would just get a normal fitting, hook it all up and measure the oil flow from the drain pipe at idle. You should see about 1 - 1.5L/min. You will be wasting your time opening up the fitting hole if you just have to put another restrictor in there anyway.

The restrictor is best placed nearest the turbo also.

Thanks for the reply again.. It's a Holset turbo if that helps?

I looked inside the tubro where the oil fitting goes and there are two smalle holes about 2-3m diameter.. presumably one going to each end of the turbo? Does that sound reasonable?

It would be ideal to have this sorted before I put it in the car as there won't be much room for work once it's in!

If I don't need to open out the hole in te block it would be better.. But then at the same point if I am not going to get enough flow from the smaller hole I really need to know so I can open something up.. or are you fairly confident the 1/8" oil pressure hole is an adequate feed size as it is?

Thank you

Lee

You don't have many options I'm afraid.

What is the part number of the Holset turbo you have. I will let you know if there is a restrictor built in or if you need to run one and what the oil return flow should be. It's up to you to do the rest. There is no easy way to set this stuff up. All you can do is use the information you are given and make the best with what you have. Fit the turbo, run the oil line, test the flow amount from the return at idle and if it needs a restrictor, then put one in...it's simple to do. If it flows enough then leave it be.

Job done.

Get me the part number or serial number on the turbo and I'll give you the information you need.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Seat of the pants assessment of the new intake: The car is way less "doughy" when hitting the loud pedal, especially off idle when stopped or in traffic, I did use a cheapo lazer thermal thingo to measure the temp around where the pod filter got its air, it was between 55 - 60°C, in saying this the car was shut off and not moving, so the OEM intake pipe was not supplying any fresh air to where the pod was when the car was at least moving A weird bonus was induction noise on the throttle in the cabin increased a bit,  I was worried that I was actually going to lose some of that induction noise I love so much, outside though, when I got the daughter to do a WOT drive by pass for me, the induction noise has increased alot when on the throttle, not quite ITB doort, but well up there I'm extremely happy with the results and have been exploring the country roads in the region  As for house mods: 1.New front fence is up and is awesome, it really upgraded how the joint looks from the street, and the added security is nice 2. Electricians have replace some interior lights, and with more lighting in the garage, a few new motion detecting lights out the front above the garage, front room, and at the front door, which I have already found heaps helpful coming and going, also now has fancy pants CCTV all round the house The only hold point for power though is the solar and batteries due to supply issues, although this will happen over the next few weeks 3. I have done a heap of landscaping out the front and I'm almost ready to do a new small retaining wall with some nice blocks to replace the brick and cemented in rocks around the raised garden beds cemented in river stone "was the fashion at the time" the house was built. I currently have a pallet of retaining wall blocks and 2 bulka bags of 20mm blue metal to replace the wood chip that is in the raised garden beds around the house 4. I now have 3 big raised garden beds for out the back to grow some vegetables, about 70cm high, 200cm long and 100cm wide 5. My 2 compost bins are already pretty full with brown, green and kitchen waste from the landscaping I'vedone so far, but they will probably take a few months to break down, so anything else that gets chopped, trimmed, and kitchen waste will just start filling the base of the raised garden beds to about 30cm before I start throwing 40cm of good compost, and stuff, for the vegetables to grow in, I'll need a few ton of compost and soil, but the local supplier can sent me bulka bags of the stuff Basically the logs, wood chips and a few strategically placed rocks for drainage, will give the beds some good organic materials down low to break down over time, and they will hold moisture during the warmer months to save the water in my big arse water tank if we don't get alot of rain So, all in all, the car and house mods are going well, and I'm really enjoying being retired, I sleep in too 0700 and slowly plod around inside until I feel like actually doing anything, and only work in the yard for as long as want, which has actually been alot over the last few weeks,  although when you look at it, it seems that not a huge amount of work has been done,  until I look at the before I started the work pics Happy days and good times indeed 
    • hahaha yeah. Plan is to get side skirts and probably just rear pods. But going to do them one-by-one. I've got a set that I really like from RHDJapen, but that one isn't shipped to AU. So need to find someone who can get it for me
    • Here's an idea, answer the questions I asked you as they are trying to work out WHY the LSD will be binding up in a straight line.
    • You haven't driven many modern cars then have you? Most of them have sfa steering feel with their stupid electric bullshit steering systems.
×
×
  • Create New...