2000RATA

You should be using the stock block port for oil sender. I have that same block with their twin kit and it is set up 1 line on each port so 1 port goes to 1 turbo the other goes to the other turbo.

Wicked69

Well that is the way I'll have to switch it. I'm not sure how much the oil the turbos need but they only come with a -3 fitting and I am using -4 lines. Still doesn't make sense why the one turbo that has never been rebuilt never has an issue.

kainedogg

iTrader: (23)

Worry about it no further. Try to get them fixed. Toss them then get some Turbonetics. I heard similar performance, bet better track record.

00Wildcat

If I'm reading/understanding right you bought these turbos used/rebuilt. I would say there is some sort of light damage to the shaft or imbalance, something hard to detect that has gone unnoticed during the rebuilds. Being used you have no idea how they were treated before you got them. There's no way I would spend $500 to rebuild a $750 (which is how much mine were new) journal bearing turbo. Not really fair to expect or fault Precision for you having trouble with 2nd hand abused parts. Now charging $500 for rebuilding a $750 turbo is unethical IMO.

TheLS1Lover

Okay, I have done a **** ton of reading over the last few days and it looks like Precision has been having some problems lately. Personally I would go ahead and try to get them rebuilt, then throw them up on eBay. Then I would look into some Borg Warner or Bullseye Power Turbos (Basically the Same). A set of the Borg/BEP Billet S363's would be awesome on your setup. They flow something like 85lb/min.

00Wildcat

There's obviously something wrong with one of them, throw that peice of **** in the trash and don't spend another dime on it. Absolutely don't sell it to someone else, he'll it might end up in someones hands here. How have you liked throwing money at someone elses disgaurded junk. Send it back to precision and get them to sell you a new for half price. Or sell the good turbo and buy a pair if something else. Just make sure that turd you have is damaged enough to be junk, so no one else has to deal with it. Drill holes in it if you send it to precision.

gtomiami

I had been considering this brand as I plan to upgrade to a larger single turbo for my FM.

Thanks to this thread I would think twice.

00Wildcat

**** one person off they'll tell the world. Make 10 people happy one of them might tell one or two others.

Hank Peabody

iTrader: (2)

I cant imagine it isnt getting enough oil, I have a journal bearing PT7675 on my car I bought new late last year. I had a T4 S400 and TC78 on the same car/setup with the same oil feed setup and it worked great with them. I put the PT76 on and it had oil coming out of the compressor and turbine seals. Even though Precision and most others recommend no oil restrictors, I wound up with a tiny restrictor on it to get it to stop pushing oil out of the seals. I only have maybe 900 miles on this turbo so far, hoping it doesnt take a dump from lack of oil. It sure seems like Precisions have alot more "oil" problems than Turbonetics and Garrett, not sure if its from trying to squeeze the last 1% of performance out of the turbos or what.

kainedogg

iTrader: (23)

True, but a legitimate issue is just that and this forum is both for praise and gripes.

westtexasbuff

iTrader: (40)

Before I bought the turbos I have right now, I did a lot of research on Precisions and found that a ton of the new CEA models were blowing up. I shied away from them, and COMP Turbo came to me and wanted to do a partial race sponsorship with my car, and I would get a set of their TBB billet 67s at a real good discount. Even including the discount, it was more than I wanted to spend at the time on a set of turbos.

I then later found a used set of older model Precision 6676s at a price I really couldn't pass up, so I scooped them up. I'll run these for a while and then go with the COMPs at a later time.

Here's an article I found on Precision turbos a while back when I was researching, it's a really good read: http://www.turbodirect.co.za/site/in...=778&Itemid=21

kainedogg

iTrader: (23)

Very interesting read indeed. Bottom line by Ebay turbos...support the U.S. economy, no?

Wicked69

I thought I would post an update to this thread. Precision is going to stand behind the rebuild and do them again. They also said I need to run a -6 line off the block to a "Y" fitting and then to two -4's. I am going to make that change and we shall see how they hold up. I'm just frustrated and want to enjoy my car. Let's hope this works well. I just ordered a new "Y" fitting.

2005vetteTT

iTrader: (1)

I have two Precision SC61's with a -4 T fitting, -10 returns (using a scavenge pump though, turbos sit lower then pan). Never had an issue so far.. probably around 10k miles.

kainedogg

iTrader: (23)

Well hopefully this works for you.

spoolin turbo

So what happened with the $$? Did you get it back?

Wicked69

No. but they are rebuilding it this time at No charge. As long as it stays together I will be okay with it. If it doesn't then I will go chinese turbo's. They feel pretty confident if I use a -6 line to a "Y" fitting and then to two -4 fittings for each turbo that I will be fine.

2000RATA

That CBR distribution block with their separate -4 lines would be better. It's bigger than 1 -6 line. I still think that's the way to go.

Toxic-Evo

iTrader: (2)

If u go back and read where he posted about the cbr block. He doesn't have two lines coming off block. He has one to a T other goes to a sensor.

Guessing the elbow is a -4 so he has a -4 feeding a T to two -4 lines. ( I could be way off. But it makes sense looking at picture) so a -6 feeding a T or a Y would be better

2000RATA

Yes I read that. And if you go back you will see where I suggested he move his oil sensor/sender to the original location on the block thus freeing up the other port on the CBR block.