Oil Control In Rb's For Circuit Drag Or Drift

[Turbine]

can I bump this one

bump

[mac71]

I understand everything about this concept but I have never seen an RB26 motor out of the bay before...does anyone have any pictures of where these oil feeds are.....and how do you differentiate between which is the 1st feed and 2nd so as not to get confused aboiut which to block and which to restrict?

Thanks

[Craved]

From the tomei website - here are some pics of what happens to the old restrictor and where they are

[Turbine]

Thanks Craved, thats the best scematic of the oil system on an RB engine I've seen. B uet ifull.

Thats great.

[Craved]

thats cool...

note that is for the RB26.

RB20/30/25 have 2 feeds V's the RB26's single feed.

[Turbine]

I wounder how this effects oil pressure just by blocking the rear orifice off.

cheers

[Sydneykid]

I wounder how this effects oil pressure just by blocking the rear orifice off.

cheers

Makes no difference, the pressure relief valve controls the oil pressure.

cheers

[Cubes]

How about idle pressure where the pressure relief valve isn't being used?

[Sydneykid]

How about idle pressure where the pressure relief valve isn't being used?

No enough flow to make a difference

cheers

[snake]

I dont really want to pull a RB26 apart just to do these mods, especially given its young age (1999) but i dont want to sit back and wait for it to go 'BANG' while im at Mallala.

Would a much larger sump with the appropriate baffles suffice for the occasional track day or does the majority of oil remain in the head regardless of sump volume???

[Duncan]

snake you pretty much have to pull the engine to put the baffled sump in, the head is only a few bolts further to go....and once thats off why not do new rings bearings and balancing as well?

[Guilt-Toy]

Ok Guys...

On sunday we started pulling the engine out to do

1: restrictor

2: clutch

3: Engine mount

4: look for any issues

5: change lifters

We took out the engine and box at the same time.

I have got pictures here for everyone to look at on how to put the restrictors in. its pretty easy and does work!!!! before i used to get lots of oil escaping from the CATCH can. ie the catch can was not working. now nothing comes out of the catch can. All i did was block the front oil feed and put a tomei 1.5mm restrictor in the rear feed (as per sydney kids advice) people would tell me my engine was rooted because its got lots of blow by rah rah rah so i aimed to prove them wrong.

To block one of the oil feeds we screwed a screw into the 1.8mm (stock rb30 restrictor) and then pulled it out. once it was out we realised that the screw was stuck in there so we just cut it and put it back in. (See pic)

As for the other one I purchased the 1.5 mm restrictor from hi octane (the tomei one for $17 delivered) and bashed the old restrictor down and bashed this one ontop. (see pics)

for the million $$ question does it make a difference in oil pressure???.

YES.. it does.. BUT only when the engine is cold. before the oil pressure gauge would go up to 3 quarters full on cold startup. Now it goes nearly up to the last line but as soon as the engine warms up it goes back to normal and NO oil pressure increase has been noticed at all.

No difference in lifter noise has been noticed.

YES it did fix my problem (well SO FAR. no oil has escaped from the catch can when before it would escape from catch can.)

I built this RB30DET back in 2004 before anyone knew about the oil issue and how to fix it - so thanks to sydney kids help i have been able to fix this problem.

Its very easy to put the restrictors in and i reccomend that you do this on your rb30det conversion.

See pics.

I hope this helps everyone - heaps of pics to look at.. I am really stoaked my clutch works properly now !!!

Edited May 31, 2006 by Guilt-Toy

[Turbine]

Thats great.

Anybody got any pictures of their oil return/drain back fitting to the rear of the cylinder head?

cheers

[Moanie]

bump

[Turbine]

bumpbadi

[Swiper the Fox]

Thats great.

Anybody got any pictures of their oil return/drain back fitting to the rear of the cylinder head?

cheers

Yes

[carl h]

is that an osgiken 3l kit i spy?

[Guilt-Toy]

is that an osgiken 3l kit i spy?

Looks like it.. you can see the spacer plate

[blk180]

Also looks like twin fuel rails mmmm must be a nice car.

Noob question with the return form the back of the head would you still need a catch can.

Brad

[Fitzpatrick Speed Works]

weld in the fitting at the back of the head, the way that is, is okay, but would be so much better welded in, theres not much room back there!!