25/30 Are You Using An Oil Ristrictor ?

[tazzy]

25/30's basically, what are you running in your setup? ive heard to block one oil feed and restrict the other or restrict both? or neither? what size restrictor are you using ... and what oil pump your using ? just intersted to see what ppl are using in there setups

[Alf]

Blocked rear feed, no restrictor in the front,running VVT, N1 pump with JPC billet gears.

Edited April 13, 2011 by Alf

[JonnoHR31]

depends on which head your using, what oil pump your using, the intended use of the car and what you've done with vct if its 25?

[FineLine]

I have blocked all feeds bar one and its restricted to 1.2 mil. Not running vct as I have a solid lifter conversion.

[tazzy]

cool cool thnx guy any other's? and jonohr31 its a series 2 rb25 head we are using a nismo oil pump.. just wanted to see what other people are doing out there

[works 510]

Restricted both, no Vct, N1 pump with jpc gears

[JonnoHR31]

s1 25 head, internal vct feed, stock 25 oil pump. 2 x 1.6mm feeds

[sriver killer]

I'm gonna steal your thread as I'm interested in the same stuff

assembling bottom end at the moment.

rb30e oil pump with no restrictors versus rb25 oil pump with restrictors (what size???) what would be your choice?

Rb25/30 r33 series one head. daily driver + weekend thrasher standard head +35R

[JonnoHR31]

with either pump the standard rb30 2mm feeds will be too big. im doing this again atm and am going for 2x1.5mm feeds with a 25 pump and internal vct

[bubba]

Hmm that's interesting..

With my 25DE (non VCT) head and N1 pump I really needed smaller restrictors (didn't touch them at all).

However the bottom end that is about to go in is a stocker with stock RB30E pump, I wasn't planning to restrict anything but now I am rethinking that idea..

Any advice would be appreciated as the head will be going on on Saturday!

Setup is:

- standard series 2 RB30E bottom end

- standard RB30E oil pump

- R32 RB25DE head

- ASR bigass sump

- cam covers vented to atmo catch can, PCV blocked, head has a fitting in the back but I wasn't going to bother plumbing it up. Still have the opportunity to weld a fitting to the sump for the head breather if needed..

So I guess my questions are: do I restrict the oil feeds and if so, how big should they be? should I bother installing a fitting on the sump (drivers side on the top of the wing?) for the head breather?

[r33_racer]

Block one feed and put a 1.5mm in the other. Install a fitting on the drivers side wing, but run that line to your catch can, not the head, -12 in size will be good.

[bubba]

Yep sweet, just spoke to my mechanic and he said exactly the same thing about blocking the rear feed and putting a 1.5mm restrictor in the front feed. Cheers

Can you get fittings that don't require welding to the sump? I was planning on bolting it up on Saturday so if I can get away with just drilling a hole and screwing a fitting it that would be much preferable to welding!

[JonnoHR31]

enzed and gasket silicone are your friend with that one haha.

i have a bogan way of blocking the 2mm feeds and a 1.5mm drill bit if you need any help on saturday....

[bubba]

Care to elaborate on your bogan way?

Chuckie has grabbed me a few 1.6mm mig tips but I think they might be too small an OD, he's now tracking me down some grub screws to match the taps up at the workshop, worst comes to worst I'll drill out a 1.5mm hole in a grub screw and tap that into the front feed.

[r33_racer]

The good thing with the grubscrew is its easily changed. Screw it out and drill it bigger or just make another with whatever sized hole you need.

Ive found the 1.2mm ally tips, which have a 1.4mm hole have worked well (close enough to 1.5mm). Just turn them down in the lathe and part it off.

[sriver killer]

I think I'm just gonna give it a go

standard rb30 oil restrictors and standard rb30e pump

[JonnoHR31]

Care to elaborate on your bogan way?

2mm thick short nails tapped in with a punch and loctited in, then drill a 1.5mm hole next to them, they're long enough though that if they do come loose they'll hit the head before coming out, simply resulting in a tiny bit extra oil flow.

[bubba]

lol nice

got some 1/4"x1/4" grub screws, probably going to take a few bits and a lot of patience heh

r33racer, that's an excellent point!

[JonnoHR31]

1.5mm bits are pretty cheap at bunnings

[bubba]

That's where I'm headed before I hit Northside up for a couple of things this morning