oil pressure, boost boy expert info needed.

[XTCshri2222]

My oil pressure is to high, when i the car on cold i read between 50-75psi, as it heats it will drop to 19-25psi, which i think is fine, but when i hit revs, my oil pressure goes up to 100psi. I have smoke coming out of the exhuast. I've taken opinion form my friend who owns a shop, he said, the new S15 t28 turbo would not come with a oil reducer into the turbo, and i could be pushing to much oil pressure into the turbo, he also said oil bypass on the oil pump? I had it cleaned and put togther, it slid very easy when it was back togther, spring worked well.

Any input?

[The_Chosen_One]

S15 GT28R usually didnt come with restrictors as they were on the block like our motors.

Your oil pressure is fine so your pump is ok.

How long have you had the turbo installed? Hopefully you got it before you caused permanent damaged by blowing the seals.

Get a 0.035" restrictor.

[XTCshri2222]

turbo has been on for 5miles. and isn't 100psi to high?

[The_Chosen_One]

For the turbo yes, for the motor no. You said its 100psi when at Rev limit.

The general consensus is after warm up your idle psi is 11psi-20psi. After that 10psi for every 1k rpms. So say your 20psi at Idle 900rpms, 30psi by 2k, 40psi by 3k, 50psi by 4k, 60psi by 5k, 70psi by 6k, 80psi by 7k and 90psi 8k.

Again this is just the general consensus. This can vary by oil weight, thicker weight will yield higher psi and vice versa.

[XTCshri2222]

hmm, i hit 75psi by 4000k i hit 100psi prob at 5-6k, my gauge dosnt go higher then 100psi. Its a new gauge, i ordered another sender to make sure its just not off.

[float_6969]

Damn, I'll trade you. I'm at like 40psi at 3K warm...

[XTCshri2222]

wish i could give you a lil bit my oil pressure

[boost_boy]

As stated, don't worry about the high oil pressure when the engine is cold (Mine does that too). Beware that you don't blow-out seals though because a weak seal will rear it's ugly face under high oil pressure. Now as for your turbo, hopefully you're still using the stock restrictor as it should be prevent you from over-oiling your turbocharger and weakening the seals. Other than that, enjoy the fact that you have a healthy engine and a healthy oil pump, but mind the situation with your turbo because that can become expensive.

Dee

[XTCshri2222]

cool, I am useing the original block oil restrictors, but i am getting oil out of a brand new GT28, there is oil in the intake piping and some even comming out of the BOV. I asked around, most people said the turbo should be fine, but excess oil pressure could forced it way between the seals, since the turbo only has 6miles if that on it. I did follow proper break in withe new turbo. One of my friends who ones a shop said if it squeezed oil out between the metal seal, it'll keep leaking unless i take it apart and clean and dry it.

It's a brand new GT28 off a S15 spec r, i had it shipped from nissan japan, came in the oem nissan box, I did have to clock the turbo a bit, but that shouldnt cause any leaks being the seal is metal?

Is it possible if I hit 100psi, the factory oil restrictor was not suffiecient to reduce the oil pressure into the turbo?

[boost_boy]

cool, I am useing the original block oil restrictors, but i am getting oil out of a brand new GT28, there is oil in the intake piping and some even comming out of the BOV. I asked around, most people said the turbo should be fine, but excess oil pressure could forced it way between the seals, since the turbo only has 6miles if that on it. I did follow proper break in withe new turbo. One of my friends who ones a shop said if it squeezed oil out between the metal seal, it'll keep leaking unless i take it apart and clean and dry it.

It's a brand new GT28 off a S15 spec r, i had it shipped from nissan japan, came in the oem nissan box, I did have to clock the turbo a bit, but that shouldnt cause any leaks being the seal is metal?

Is it possible if I hit 100psi, the factory oil restrictor was not suffiecient to reduce the oil pressure into the turbo?

The only way you will see your engine produce up to 100psi of oil pressure if you're revving it while it's cold, so try not to rev it until it's warmed-up because technically, no one shouldn't be revving their turbocharged cars at start-up, even though I do and I still don't experience the issues you guys are having. If this problem persist, you may want to pull that snail off for inspection or at least take off the cool side intercooler pipe, clean it up and try it again to see if indeed the turbo is still leaking.

If you are using the factory restrictor, this should have been sufficient enough as it is not on the turbocharger's chra or lehman's terms it is restricted before the turbocharger, so oil should flow freely through the turbocharger, thus not being restricted which should any possible build-up of oil pressurewithin the turbo's cartridge.

Dee

[float_6969]

In relation to this, I just fixed my ticking lifters. The cause was because I didn't have any sort of oil restrictor in the feed line. I broke off the stock fitting and had to make something work. It lacked a restrictor. I just installed one tonight and my lifters instantly quieted up, and my turbo quick smoking.

The turbo is the original CA T25 that came on my CA, so I assumed the smoking turbo was just because it was old.

Get the .035" restrictor.

[XTCshri2222]

i dunno i have the stock restirctor, i'm gonna add another on on the turbo, i just can't figger this thing out. oil psi today cold was at 80-90psi at idle, i should have my new sender here tomarrow, hope thats the oil pressure issue. and hope the second restrictor stops my turbo from leaking.

[sebericpas]

may be your pressure valve in your oil pump or a restrict in your oil system but you said you burn oil a restriction don t give you much oil. scuse me for my bad english