Rb30/26det Advice

[PALADN]

Hey guys.

I have built an RB30/26 Head.

MODS

rb30 series 2 block

rb26 head (fully reco)

PAR rods

Aries Pistons

All ARP bolts

ACL Racing Bearings

Race preped crank

High Energy 8.5Lt sump

Knock Sensors Moved higher on the block

Nismo Twin Plate

After Market Smaller Balencer

870cc Injectors

Jun Oil pump

Jun Drive Collar

External Oil return (back of head to sump)

Thickest Cometic metal head gasket (recommened by rocket to use with the aries pistons??)

High mount manafold

Garret GT3071R

Surge tank with 044

After market fuel rail

After market pressure reg

Link G2 ecu (with air inlet temp sensor)

I think thats everything

Ok heres my problem

The engine has been having oiling issues since it was built. we first installed a tomie oil kit into the block with no luck. It still poored oil into the catch can at mid to high rpm. We then pulled the head off and blocked off the rear oil feed. Seamed to work better but still puts oil into the catch can. Part of the issue is that when hot the oil pressure sits at around 25-35psi at idle but any touch of the rpm and it jumps to 100psi.

Does anyone have any sugestions? I was thinking of some how turning the pump pressure down??? is this easy to do? if so how?

Just as a side note the engine made 230Rwkw and 560Nm torque on 13psi

Also anyone got any sugestions on a new turbo? cant be to lagy

Edited September 26, 2007 by PALADN

[fantasy]

Billet Turbochargers Billet Z-P.

Same as T04Z but spool faster.

[Guilt-Toy]

have you looked at our oil controll thread by Sydney Kid ?

Did you run a oil return line from the back of the head to the sump?

did you make the oil return holes bigger to the sump ?

did you change the baffles and go for some after market ones?

[PALADN]

Yes i looked at the oil control thread.

Yes we have an oil return line from the back of the head

The return holes are a little bigger

What baffles?? Im using a high energy 8.5lt oil sump

[Guilt-Toy]

hmmm interesting.... how much oil do you have escaping into the catch can? what revs are giving this thing? and how long are you reving it for?

[PALADN]

7000rpm for long ish periods of time. we have over 1lt of oil in the catch can after about 6 laps. How do you drop the oil pressure ? currently it sits a 100psi when reving

[r33_racer]

need to change the relief spring to a weaker one. Sump off job.

also +1 for billet. Talk to mark, hes a great guy. Awesome turbos too.

Edited September 26, 2007 by r33_racer

[Adriano]

Im hoping you forgot to put the crank collar in your list of mods, or youll be looking at more than a sump off job soon. Do you know what bearing clearances you are running, tight clearances increase oil pressure.

Edited September 26, 2007 by Adriano

[PALADN]

Hey no idea on the latest clearences. But yes I just added the collar to the list

[700HP-GTR33]

Did you fit any oil restrictors?

You have way to much oil being pumped up

I think this may be your problem

[PALADN]

One is blocked and the other is a tiny tomei restrictor

[PALADN]

can anyone tell me where to get another spring? how how to drop the tention

[PALADN]

anyone??

[Guilt-Toy]

i would call the place you got the pump from.

[PALADN]

I dont think i can speak japanese

[rockabilly]

hi mate,to drop pressure in an oil pump you need either a weaker relief spring or the same tension spring but shorter in length.. the sump must be removed then you can see the oil pump relief nut, undo that and a spring and plunger fall out. then its a new spring and away you go.

Edited September 28, 2007 by rockabilly