What Oil Pressure Do You Have At Around 6000Rpm

[The Bogan]

Im running around 90 psi or 6 bar at around 6000rpm, Im wondering if this may be causing some of my oil problems, Ive read that some are running 70 psi, Im able to lower my oil pressure by a bleed system and Im wondering what would be the best/safest psi to run..

What oil pressures are you guys/girls running.

Thanks, Mark

[abr33]

Depends on your oil type, weight, crank clearance etc, im running 2.5 thou journal clearance and redline 15w/50 with pump (tomei) at 65 (more like 70) psi.

What pump are you using?

[The Bogan]

Depends on your oil type, weight, crank clearance etc, im running 2.5 thou journal clearance and redline 15w/50 with pump (tomei) at 65 (more like 70) psi.

What pump are you using?

Tomei pump 10 - 40 oil in a newish (5000k) motor

Thanks, Mark

[abr33]

Lucky, no need to take motor out to adjust it :-)

In my opinion, provided your not making alot over 300-350 kw 70 psi will be ok,

Double check this, i may be incorrect.

Oh and is it an ester synthetic oil or cheaper synthetic?

[The Bogan]

Lucky, no need to take motor out to adjust it :-)

In my opinion, provided your not making alot over 300-350 kw 70 psi will be ok,

Double check this, i may be incorrect.

Oh and is it an ester synthetic oil or cheaper synthetic?

making 350 on low boost and about 380 on high ATM, the oil is Nulon.

Thanks, Mark

[The Dan]

Your oil pressure is fine don't touch it

[kitto]

High oil pressure is better than low oil pressure. 90 lb @ 6,000rpm is pretty good though. Shows that your engine wasnt built with stupidly large clearances.

[abr33]

Ok thats a shit of a lot of power lol. 90 is alright imo.

Food for thought is v8's that typically have 5 main journals that are usually similar size to an rb which has 7.. and most run 60 ish psi with average oil.

And for similar outputs it works perfectly for alot of them.

[The Bogan]

I may look at getting a lighter synth oil (for drainage), and knocking the oil pressure down to about 80 psi, .

I need to do something to slow the volume oil getting into the head.

Thanks for the info, Mark

[abr33]

lighter will increase the amount in your head, i found this before fitting restrictors etc when i had an n1 pump, lighter atomises and blows out easier, also more will get to the head and so on... I learned it wont help lol.

[The Bogan]

lighter will increase the amount in your head, i found this before fitting restrictors etc when i had an n1 pump, lighter atomises and blows out easier, also more will get to the head and so on... I learned it wont help lol.

Nothing is ever easy is it, what weight oil you using now ?

Thanks, Mark

[The Dan]

I may look at getting a lighter synth oil (for drainage), and knocking the oil pressure down to about 80 psi, .

I need to do something to slow the volume oil getting into the head.

Thanks for the info, Mark

You're fixing the wrong thing

Fix the breathing problem your engine has, not the oil pumping thing it's supposed to do

[The Dan]

lighter will increase the amount in your head, i found this before fitting restrictors etc when i had an n1 pump, lighter atomises and blows out easier, also more will get to the head and so on... I learned it wont help lol.

That statement is more incorrect than 10 incorrect things

[r33_racer]

That statement is more incorrect than 10 incorrect things

And that statement couldnt be more correct!

[The Bogan]

You're fixing the wrong thing

Fix the breathing problem your engine has, not the oil pumping thing it's supposed to do

Leak down was good, I cannot remember reading but it was apparently OK, head drains were drilled out, has - 12 head drains/vents to sump, has - 12 return from catch can to sump, has 1 x 0.8mm restrictor for the head feed, 1 x 0.6mm for the VCT.

The motor was pulled and tolerances double checked.

Its fine at the drags, the only time it isnt is when Im getting up it hard and going around corners.

I dont know what else to do, my brain hurts bad..

[abr33]

That statement is more incorrect than 10 incorrect things

Like I said, I found this on my engine originally. Between running 5w/30 and 10w/60, the lighter was an absolute oil spewing mess, the thicker pumped some out but nothing like the 5w/30. So how do you figure this?

Im not saying its the solution by any means, but thats what I personally experienced so my statement stands.

[The Dan]

lighter atomises and blows out easier

More specifically this

[abr33]

More specifically this

Ok, it seemed to blow out more as oil in vapour and paint the whole engine bay, well, how i see it anyways, that was the 5w/30 (all edge sport) then the 0w/40 was a tiny bit thicker and sorta ran out more than spray and then 10w/60 used to just dribble a bit.. Thats how I came to such a conclusion