[Robert]

There are a few key items that you need to address relating to the oiling system for a turbocharged vehicle. All of the following items need to be accounted for to ensure proper operation.

? -3AN or -4AN (1/8?) maximum oil inlet line
? -10AN (1/2?) minimum oil drain line
? Orientation of oil inlet on bearing housing must not be greater than 15? from vertical.
? No 90? turns or kinks in drain line
? The use of silicone at or around all oil holes should be avoided at all times due to possible constriction of the holes due to silicone impeding oil flow when the silicone is applied and torqued to flange surfaces
? Oil line needs to make smooth transition into oil pan (no 90? fittings on pan)
? Oil drain needs to be placed as high as possible on oil pan (above the oil level)
? Hole in oil pan must match the oil drain line size
? If oil drain is located next to crankshaft main journal, then possible crank windage may occur (oil being thrown towards oil drain hole)
? Adequate crankcase ventilation
? No vacuum can be placed on the compressor inlet of the turbocharger unless turbocharger has a carbon seal installed
? Clean air filter
? Turbocharger must be mounted above the level of the oil pan so that oil can flow freely to the oil pan by gravity alone
? If the turbocharger is mounted below the top of the oil pan then a scavenging system must be implemented
? Excessively high oil pressure at idle may cause oil leakage and/or smoking at idle or deceleration
? Upon cold startup the use of heavy weight oil may cause smoking and/or leakage until oil temp increases to proper operating range

[cuda340]

Originally Posted by Robert

? Excessively high oil pressure at idle may cause oil leakage and/or smoking at idle or deceleration
? Upon cold startup the use of heavy weight oil may cause smoking and/or leakage until oil temp increases to proper operating range

[/quote]

What is considered excessive oil pressure? I have a GTK-500 and I'm having this problem on my SRT-4. My oil pressure on cold startup is 100+psi and about 60psi when warm. Cruising on the freeway at 2500 RPM my oil pressure sits at 80psi. I have a -3 oil feed line, and am running straight 30 weight oil.

I know you recommend not using a restrictor, so what are my options?

[Robert]

Originally Posted by cuda340

What is considered excessive oil pressure? I have a GTK-500 and I'm having this problem on my SRT-4. My oil pressure on cold startup is 100+psi and about 60psi when warm. Cruising on the freeway at 2500 RPM my oil pressure sits at 80psi. I have a -3 oil feed line, and am running straight 30 weight oil.

I know you recommend not using a restrictor, so what are my options?[/quote]
In your case I don't know that a restrictor is out of the picture. I will say that is some pretty darn high oil pressure. I know modern cars run higher then normal pressure but even my 350Z never gets above 90 on cold start and is between 30-65 PSI under cruising high load conditions.

[importdude]

Originally Posted by Robert

? Orientation of oil inlet on bearing housing must not be greater than 15? from vertical.

does this mean i cant use a 90degree elbow?

my turbo just started smoking and i had to bring it to get rebuilt
rebuilder told me its oil stravation that cuase the exhuast bearing side to mess up

its t3/t4ob h strim 48stg3 ball bearing turbo
here is a picture of my oil feed

i used a 0.060 restricter + 90degree elbow

[TheOdd001]

The way it reads I wouldn't use that 90 degree elbow and I've been told not to use restrictors...

[Robert]

Originally Posted by TheOdd001

The way it reads I wouldn't use that 90 degree elbow and I've been told not to use restrictors...

You can use a 90 elbow if you like on that. What that means is to not allow the bearing section orientation (clocking) to be more then 15 degrees from vertical. So not the actual fitting angle but rather the direction the oil inlet itself is facing.

[B_Real45]

I've been trying to research this like mad. Recently, I purchased a Tnetics kit for my Scion TC 2nd hand - but it's still brand new in box.

The turbo included in the kit is an "older" model without a wet center housing. Everyone I've spoken to who has this kit with the non wet housing has blow their seals. Our cars will run up to 90psi of oil near redline.. However Turbonetics doesn't recommend using a restrictor?!

I want to take all precautions before installing this turbo on my daily driver. I cannot afford to blow the turbo seals and have my car sitting x weeks for a turnaround.

The car whel cold idles at 45 - while warm it can get up to 90psi under hard acceleration - please explain why a restrictor would not be recommended on a ceramic ball-bearing Turbonetics turbo.

[Robert]

Originally Posted by B_Real45

I've been trying to research this like mad. Recently, I purchased a Tnetics kit for my Scion TC 2nd hand - but it's still brand new in box.

The turbo included in the kit is an "older" model without a wet center housing. Everyone I've spoken to who has this kit with the non wet housing has blow their seals. Our cars will run up to 90psi of oil near redline.. However Turbonetics doesn't recommend using a restrictor?!

I want to take all precautions before installing this turbo on my daily driver. I cannot afford to blow the turbo seals and have my car sitting x weeks for a turnaround.

The car whel cold idles at 45 - while warm it can get up to 90psi under hard acceleration - please explain why a restrictor would not be recommended on a ceramic ball-bearing Turbonetics turbo.

The inline filter on the oil inlet of the bearing section also acts as a restrictor so there is no need for an additional restrictor on this set up.

[B_Real45]

Robert,

Thanks for the reply.

It's all good now - the deal fell through with this guy I was purchasing the kit from. So I instead purchased a new kit from Turbochargers.com. The kit should come with the new wet center-housing.

Now all I need is the instructions for the wet housing. Can you provide?

Thanks.

[Robert]

Here you go:
http://www.turboneticsownersclub.com...hp?p=7695#7695