Jump to content
SAU Community

Recommended Posts

  • 2 weeks later...

What is right way to update my engine?

I got 550hp rb26 (r32gtr/circuit) and i bought my car in japan. I dont know manufacturer of oil pump but engine is "overhauled" and got good oil pressure. Is it good idea to put that 1,5mm restrictor and oil drain hose rear of camhead to oil sump. I just bought Trust oil sump and i have to wait 2months to get engine out and weld that sump.. Then i do other tricks same time and check manufacturer of oil pump.

What other tricks i have to do?

  • 4 weeks later...

If you are unclear as what is "recommended" please see the link from Page 2

http://www.skylinesaustralia.com/forums/in...st&id=38818

PDF shows each motor and oil pumps

The length really isn't all that critical. Make it about 7-8mm or something. Width is ~6mm.

I picked up a length of 6mm black rod for the total cost of $2. I wouldn't bother with doing it on a lathe.

6mm black rod, chop, clamp and drill in a drill press then taper one end and use a pin punch to tap it in.

  • 4 weeks later...
sorry probably a stupid question but how much should you drill out the returns? what size?

think of the returns as port matching, if you put a gasket on the deck, you will see the amount of overhang of the rear returns on the block.

take out whats not covered by the gasket

  • 2 weeks later...

May i ask the question with a rb25, why is the front feed blocked off and the rear feed restricted but with the other engines its the rear feed that gets blocked off and the front feed get's the restrictor ??

First attempt at a table;

-------------------- -------------------- RB26 -------------------- -------------------- RB25/20 -------------------- -------------------- -------------------- RB25

-------------------- -------------------- No VVT -------------------- -------------------- No VVT -------------------- -------------------- -------------------- VVT

-------------------- -------------------- Front Feed, Rear Feed -------------------- Front Feed, Rear Feed -------------------- VVT Supply, Front Feed, Rear Feed

Standard Oil Pump

Road ----------------------------------- 1.5 mm, Block off, ------------------------------ 1.5 mm, Block off, ------------------------------ Leave, Block off, 1.5 mm,

Drag ----------------------------------- 1.25 mm, Block off, ------------------------------ 1.5 mm, Block off, ------------------------------ Leave, Block off, 1.5 mm,

Circuit/Drift ------------------------------ 1.25 mm, Block off, ------------------------------ 1.25 mm, Block off, ------------------------------ Leave, Block off, 1.25 mm,

RB26 N1 Oil Pump

Road ----------------------------------- 1.5 mm, Block off, ------------------------------ 1.5 mm, Block off, ------------------------------ Leave, Block off, 1.5 mm,

Drag ----------------------------------- 1.25 mm, Block off, ------------------------------ 1.5 mm, Block off, ------------------------------ Leave, Block off, 1.5 mm,

Circuit/Drift ------------------------------ 1 mm, Block off, ------------------------------ 1 mm, Block off, ------------------------------ Leave, Block off, 1 mm,

Aftermarket Oil Pump (Jun HKS Apexi Trust etc)

Road ----------------------------------- 1.25 mm, Block off, ------------------------------ 1.5 mm, Block off, ------------------------------ Leave, Block off, 1.5 mm,

Drag ----------------------------------- 1 mm, Block off, ------------------------------ 1.25 mm, Block off, ------------------------------ Leave, Block off, 1.25 mm,

Circuit/Drift ------------------------------ 1 mm, Block off, ------------------------------ 1 mm, Block off, ------------------------------ Leave, Block off, 1 mm,

Note that all of the above assumes;

1. Standard Nissan clearances

2. Oil cooler (where necessary)

3. Improved oil control in the sump (where necessary) including wings, baffles, one way doors etc

4. External oil return from cylinder head to sump on all circuit/drift cars and drag cars with non standard oil pumps

5. Hydraulic followers in RB20/25's. if changed to solid followers then use RB26 restrictor as above

6. Castrol Edge 10W60 (or equivalent)\

7. Improved oil flow in the cylinder head return galleries through the block.

8. Refer previous posts in this thread

:rofl: cheers :)

PS; This guide is for what ever cylinder head you use, the block is irrelevant. Whether you use an RB20/23/24/25/26/27/28/30 bottom end is doesn't matter when it comes to restrictor sizes. It's all about what oil pump you use, what cylinder head and what you use the car for.

Edited by SATO GTS

I read the most posts of the topic.. I have an RB25DET and I will make a rebuild theese days...!

The changes I will do is:

N1 oil pump

Block rear feed

1.5mm Tomei Oil Gallery Orifice at Front feed

External oil return

Improve oil flow in the cyllinder head return galleries

But I don't see any post for oil pump collar..!

I need a JUN oil pump crank collar??

Also with external oil return and improved oil flow in the cyllinder head return galleries les is too much oil return??

You are 100% that I will have it any problem at head at low rpms?

I use my car for everyday in traffic, for travelling but and drag,drift,cirquit and I will go for 500hp!!

Getting the oil piump collar is is a 100% must do. especially when using the N1 pump as there has been MANY MANY failures.

I did the oil pump collar on my engine and i still used the standard oil pump which is not prone to cracking and breaking like the N1 pumps are.

so the answer is.. YES. please do the crank collar. if you dont your crazy.

I read the most posts of the topic.. I have an RB25DET and I will make a rebuild theese days...!

The changes I will do is:

N1 oil pump

Block rear feed

1.5mm Tomei Oil Gallery Orifice at Front feed

External oil return

Improve oil flow in the cyllinder head return galleries

But I don't see any post for oil pump collar..!

I need a JUN oil pump crank collar??

Also with external oil return and improved oil flow in the cyllinder head return galleries les is too much oil return??

You are 100% that I will have it any problem at head at low rpms?

I use my car for everyday in traffic, for travelling but and drag,drift,cirquit and I will go for 500hp!!

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

    • It is a kunfine Android screen . Does anyone know the wirering diagram of the fuga ??
    • just an update to this, poor man pays twice  Tried sanding down the pulleys but it didnt do the trick. Chucked another second hand alternator in the na car which I got for free off my mate and its fixed the squelling. Must have been unlucky with the bearings.    As for my turbo car, I managed to pick up a cwc rb alternator conversion bracket + LS alternator for 250 off marketplace, looked to be in really good nick. Installed it , started the car and its not charging the battery.... ( Im not good with auto elec stuff so im not sure if this was all I needed to do but I verified such by using a multimeter on the battery when the engine was running and I was only getting 12.2v )   I had to modify the earth strap for the new LS alternator , factory earth strap was a 10mm bolt which did not fit the bolt on the LS alternator which was double the size so I cut it off , went to repco bought some ring terminals that fit, crimped it onto the old earth strap and bolted it up to the alternator , started the car and same issue. Ran like shit and was reading 12.2 at the battery.  For a "plug and play" advertised kit thats not very plug and play but alas.  My question is , am I missing something ? Ive been reading that some people recommend upgrading the stock 80 amp alternator fuse to a 140 amp but I dont see how that would stop the alternator charging especially at idle not under load.  Regardless ive pulled it out and am going to get it bench tested by an auto elec tomorrow but it would be handy to know if ive missed something silly or have done something wrong.   
    • My wild guess is that you have popped off an intake pipe....check all of the hoses between the turbo and the throttle for splits or loose clamps.
    • Awesome, thanks for sharing!
    • To provide more specific help, more information is needed. What Android screen? What is its wiring diagram? Does the car's wiring have power at any required BAT and ACC wires, and is the loom's earth good?
×
×
  • Create New...