how much more oil...for turbo?
 

hey people i just did my turbo install and it's a t-25(i know it's small) on mydohc zc and of course the turbo is oil cooled(only) and i need to know how much more oil i should add to my engine from now on? and if i should use a certin oil over the next?(from your personal experience) thanks for any help

Re:how much more oil...for turbo?
 

youre not going to need more than the OEM recommended 3.5-3.8L, as long as you have oil pressure and your feed line is connected properly your turbo will be getting the oil, possibly even to much

I think that filling it with to much oil and going upto or over your oil return line can cause some major problems as well

You should check your oil level a lot more than often though

Re:how much more oil...for turbo?
 

yeah...it would be important to have AN OP guage...and also...if you start seeing smoke...get a restrictor valve or something close to it. Too much oil will eventually break the seals on the turbo and smoke will not be the only issue. after about a week you will see the smoke if you are getting too much oil...on that T25 it could be less time than that.

Re:how much more oil...for turbo?
 

What should the oil pressure be going to the T25?

Re:how much more oil...for turbo?
 

if you use a -3an oil line it will reduce the oil pressure enough to where it won't blow your seals in the turbo. i'm using a -4an line and no problems even with a 87'300z turbo.

Re:how much more oil...for turbo?
 

thanks guys that helps alot. oh and i do have an op gauge im going to install after x-mas

Re:how much more oil...for turbo?
 

does anyone know what the stealthmode kit uses? -3 or -4???

Re:how much more oil...for turbo?
 

i think he uses -3an, i used -4an cause that's what the greddy turbo kit comes with i heard. so i bought it in -4an size.

Re:how much more oil...for turbo?
 

Maybe you should run a 15g turbo just because greddy says so huh?

As far as adding more oil to the system, I've always just added about an extra 1/4 of a quart to all my turbo setups.

Re:how much more oil...for turbo?
 

actualy i read that in the FAQ as the reason why the writter chose a -4an oil line. a -3an is used also, it provides lower oil pressure than the -4an even and is a lil easier on the seals.

Re:how much more oil...for turbo?
 

guess what, I've used -4 and -3 without problems. I prefer -3 because its smaller, easier to work with, looks better and the ID of the -3 is about the same size as most factory turbo charged cars oil lines.

Re:how much more oil...for turbo?
 

Aside from physically measuring the oil feed pressure on an OEM, matching ID with an OEM would get you close enough. I personally set mine with a T-valve to not exceed 40psi at high revs, but still register at idle.

Re:how much more oil...for turbo?
 

My kits come with a -4. I doubt you would see any different pressures from either of the two. Flow, maybe, but not pressure.