Thread: QR25DE oil pressure ?

I placed this n the turbo section since the info is for my Holset build...looking at trying to find out what the oil pressure is on idle and 6K rpm on our motors...to figure if I need to get -3AN or-4AN w/ restrictor for the oil in...if anyone has this this would be GREAT!

All are approximates from the FSM:

14psi@Idle
43psi@2k
57psi@6k

WOW, those are some low numbers. i idle at 45-50 when hot and WOT hits around 110psi...this is on the sqr though.

Originally Posted by MoltenNismo

All are approximates from the FSM:

14psi@Idle
43psi@2k
57psi@6k

I'm in this ballpark as well

These are way off for me... mine are closer to:
20-30psi @ idle
70-80psi @ 3k
100ish @6K

Originally Posted by L8YBUG

These are way off for me... mine are closer to:
20-30psi @ idle
70-80psi @ 3k
100ish @6K

Sounds like you are running too thick of oil.

Originally Posted by MoltenNismo

All are approximates from the FSM:

14psi@Idle
43psi@2k
57psi@6k

Wow that should be great for the Holset than...it need no less than 10 @ idle and no more than 70 @ 6k ....I see too many other 4 bangers with this turbo running restrictors mainly since they have over 100 psi of oil pressure...BUT to be on the sfae side I plan to place a temp oil pressure gauge and see the exact pressure that would be feeding into the turbo...thanks for the help guys!

Just make sure you wait for the oil to heat up cause it will definitely go over 70 when cold. Mine used to go over 120 when cold and reved to 4k. And you will need to run 0w-20w. To get that low of numbers. And I had over 160k miles on my 04.

Originally Posted by Re spec the V

Just make sure you wait for the oil to heat up cause it will definitely go over 70 when cold. Mine used to go over 120 when cold and reved to 4k. And you will need to run 0w-20w. To get that low of numbers. And I had over 160k miles on my 04.

Oh wow, didn't know that...now I'm doing the oiling issues....it needs a 16AN oil drain!..what a pain...

Originally Posted by MisterNuts

Sounds like you are running too thick of oil.

i'm running 10-w30 brad penn... its the thinnest brad penn to my knowledge and has been working fine for me..

we run the engines we build at my shop up around the 70+ psi range as well

So getting thinner oil is better to keep low oil pressure then. Can you find 0w-20w at any standard place? like Autozone?

Originally Posted by Re spec the V

Just make sure you wait for the oil to heat up cause it will definitely go over 70 when cold. Mine used to go over 120 when cold and reved to 4k. And you will need to run 0w-20w. To get that low of numbers. And I had over 160k miles on my 04.

so if I use 5w30 or 5w20, just plan to use a restrictor then? So the thinner the better?

Originally Posted by Nperez1986

So getting thinner oil is better to keep low oil pressure then. Can you find 0w-20w at any standard place? like Autozone?

Yes, thinner oil = lower oil pressure. Too high of pressure means oil isn't going where it needs to which is generally not a good thing.
And you should be able to pick up 0w20 at Autozone I believe. Otherwise Redline makes a great 0w20 if you don't mind spending a few extra bucks.

Originally Posted by MisterNuts

Yes, thinner oil = lower oil pressure. Too high of pressure means oil isn't going where it needs to which is generally not a good thing.
And you should be able to pick up 0w20 at Autozone I believe. Otherwise Redline makes a great 0w20 if you don't mind spending a few extra bucks.

Yeah its $35 at advance for 5qts of Castrol Edge 0w20. SO it's thinner than 5w-20, the "w" is for the wieght, and the 20 is for? Sorry if I don't know what the numbers mean in motor oil. I always get 5w-30 on my regular oil changes

0 is the cold viscosity, 20 is the hot viscosity. I know hot is tested at 210* F, not sure on the cold.
But basically a 0w30, 5w30, and 10w30 are all the same thickness when warm, the only difference is the thickness when cold.

gotcha so the 20 is thinner oil when it's hot. Thanks

I'm hitting 15 at idle but around 2k it shoots up to 60-70. I havn't even hit 6k yet! my oil pressure is gonna max lol. I'm using 10w30 mobile 1.

Oil to new and thick?

frozenbarb my oil pressure reads the same (im not boosted tho) i think it has to do with the sensor placement is yours in a sandwich plate?

Sent from my MB300 using Tapatalk

Yeah it;s in a sandwich plate but the new oil is very thick so I'll let it break in first.

I'm using 5W-30 like normal...after warming up I get it to about 60psi on WOT...on idle its at 10+ ...so its working fine with me