Oil Restrictors

[warpz0r]

Hi all

have a rb30 block and rb25det head...

am i to buy 2 x 2mm oil restrictors to put into the rb30 block?

thanks

[Craved]

umm no the RB30 has 1.8mm restrictors from factory..

heres the best info, as listed in the RB30 conversion thread.

There are 3 answers, all previously posted;

RB26 cylinder head= 2 oil feed galleries between the block and the head

We block one off, same as RB26's are standard

We use a 1.5 mm restrictor in the other

Plenty of oil flow to the camshaft bearings, not too much oil slopping around in the head, getting chucked into the catch can and leaving the sump in short supply.

RB25 with VVT= 2 oil feed galleries between the block and the head

Plus 1 feed to the VVT actuator

We block one off, same as RB26's are standard

We use a 1.5 mm restrictor in the other

Plus leave the VVT oil feed as per standard

Plenty of oil flow to the camshaft bearings and VVT actuator but not too much oil slopping around in the head, getting chucked into the catch can and leaving the sump in short supply.

RB25 without VVT= 2 oil feed galleries between the block and the head

Plus 1 feed to the VVT actuator

We block one off, same as RB26's are standard

We use a 2.0 mm restrictor in the other

Plus block off the VVT oil feed

Plenty of oil flow to the camshaft bearings, no VVT actuator. Not too much oil slopping around in the head, getting chucked into the catch can and leaving the sump in short supply.

Hope that was of some help

cheers

===========================================

1 X 2 mm restrictor = same oil flow as 2 X 1.4 mm restrictors

2 X 1.5 mm restrictors = 12% more oil flow than 1 X 2 mm restrictor

The 12% extra flow is why you get oil in the catch can

Hence why we use 1 X 2 mm restrictor, as our cars see lots of continuous high rpm

[R31Nismoid]

And that they said was that... the RB30 thread has all the info.

please search it