I had the same issues on my 04 Silv. with an STS kit.

I ran 10#s , no prob with the oil pump after i wired it to run on high all the time. It was fine after that.

Also i had bought a spare oil pump and relays to keep in the truck, i had a relay fail while i was on vacation and oil flooded my turbo and smoked like hell haha.

Also i had a hydraulic shop make me a high temp oil return hose , the one STS gives you is junk.

 

I am running 12volts as well . I have also upgraded the hose. I know the pump is weak, i just wanna run 10 psi at the track tomorrow and cannot get a new one in time. Thanks

 

Like i said... LONG, LONG time ago when I first was turbo'ed, I had the STS for 2 years. 7psi, the pump/buzzer was fine, turned it up to 10 and the buzzer would go off cuz the turbo is spinning faster making more boost, consuming more oil though the bearings. Just enough oil to cause a small amount of back up in the return system before the pump and 3-4 psi of pressure on the buzzer switch. A few turns on the switch and was good to go. The pump was fine and lasted another 2 years or so AFTER I sold the kit.

 

I'm not trying to be a dick, but I don't follow half of what you wrote. If by small line you mean an AN -4 oil supply line to the turbo, then you are most likely over-oiling the turbo. Consider this - an oil line as big as AN-4 combined with roughly 60psi of oil pressure @ WOT will overwhelm the center section of the turbo with oil, causing the seals to blow. Don't quote me on this, but 1/8" is about the inner diameter of AN-4 line. With that said, a 0.125" restrictor would defeat the purpose of restricting the oil flow as it would be about the same size as the line. You would be surprised how common over-oiling a turbo can be and STS knows nothing of it - which is why their kits don't come with an oil restrictor and why so many people blow turbos with STS kits (I'm one of them). As for the buzzer going off, you most likely have a problem with the oil scavenging. The biggest problem being that STS's kit doesn't allow proper oil draining from the turbo. Please, pull the intake pipe off the turbo. There is probably oil in there by now and even if there is not, there will be soon if your current issues persist. Trust me on this stuff, it all happened to me and since I implemented my own designs, I've never had any issues.

 

Thanks for the opinions guys. I made some interchangeable restrictors.that can be changed out. I will try the hobbs switch in the morn. If that don't work, I'll try the jets I made. I goota race tomorrow! Ruined turbo or not!!!

 

Attention rear mounted turbo guys
For the longest time I was having issues blowing the turbo's seals. I did some research and discovered that OVER-oiling a turbo is more common than you might think. So I installed an oil restrictor with a 0.065" orifice on my journal bearing Garrett 60mm and that seemed to do the trick. Every turbo and setup is different, so the orifice size will vary. As a rule of thumb though, with a moderate size turbo, ball bearing turbos typically require a smaller orifice and journal bearing turbos require a larger orifice.

In addition to the oil restrictor, I rewired my ExaPump to run at a CONSTANT voltage rather than STS's **** poor "fuel pump referenced" voltage. Turns out STS does that in order to try and prolong the life of their CHEAP pump which is NOT designed for oil scavenging. So if your turbo keeps blowing seals, check into an oil restrictor and if you're running a rear mount, get a pump OTHER than the STS pump and run a constant voltage to it.

I fought this battle for OVER a year and thought I'd share this with all of you in hopes that you all avoid blowing multiple turbos like I did.

 

Where are you guys getting the oil restrictor at? I have heard of people using a nitrous jet but where do you install it?

I just took the turbo off the Hemi and all the pipe were full of oil all the way to the tb and coming out the exhaust. It is a STS rear mount also. I had the Hobbs switch jumped to always have the pump on high and that did not stop it from oiling everything down. The buzzer was not coming on though.

 

Um, Josh. This was one of my posts on LS1truck.com .
-jetmech

 

Oil restrictor:

http://www.atpturbo.com/mm5/merchant..._Code=ATP-OIL1

The problem of oil in the intake pipes is not a difficult fix. I used AN-10 between the turbo and scavenge pump. The STS oil scavenging plumbing is CRAP. I'll try to post some pics of my setup.

 

He has a return fuel system w/ a fp regulator that can boost refrence 1:1...Thats is why he can get more power out of smaller injectors as opposed to returnless fuel system w/ out boost refrenced regulator.