Well i bought myself a precision sc6152 turbo last year for my evo 3.
Went with the car to the dyno jet a pulled 502whp at 230kpa.

Everything seemed to work fine untill after 1200miles and when the car was idling it came blue smoke from the exhaust..
Soo it was the turbo that has gone bad.. so i bought myself a new one..sc6262 and the samething happend again wtf.
It was time to take in the car for a rest under the cold winter.

Now everything is rebuilt with a brand new HP6262 Billet turbo that so many uses over the world.
and now it ****ty happends again.. what's wrong.. isn't the precision chargers workable on evos?
is precision low crap quality turbos??..probably not?

I talked with Eric on titan and he recomended me to use a 3mm oil restrictor on my oilfeed as i have changed location and using the oilfeed from the filter housing. It is a journal bearing turbo, i'm using an4 steelbraided hoose to the turbo and an10 return line.
Shall i switch back and take oilfeed from the head even as precision says that i should not take oil from the head??

Ths year the turbo hadn't got less than 1bar of oilpressure and not more than 8bar of oil pressure.

//Anders

 

i had the same problem on my sti as did many others. a lot of evo guys blow them too. precision is just garbage. i wouldnt run another precision turbo if they paid me.

 

You are not getting enough oil psi. Ive used percision and have had a 6262. its recommended to run a longer line to the oil filter housing and not the head. If you are doing this and having a issue maybe you dont want a restrictor. Ive ran the 6262 for a year and 30+psi daily with zero issues,and no alot of people doing the same. You can say screw one co. just because one person has a problem, Worse case switch to a dual ball bearing . Good luck either way.

 

can you point me in the direction of a blown garrett turbo thread? cause i can find dozens of blown precisions and garrett dwarfs precision.

 

So you mean that 14,5 psi is to little at idle?
And 116psi is also to little at 8000rpm??

It isn't the problem here, it maybe could be the launch that causes the problem.
When launching the exhaust wheel gets to warm and the oil seal loses it's strenght and also the journal radial bearings after a while i'm afraid.
I ordered a staggergap oil seal today and will try it and se if it works.. otherwise it will be expensive..

 

no one knows?
i took apart my turbo and replaced the oil seal to a staggergap seal.
Hopefully it will work this time.

 

Did you say the launch?? like Antilag??? there is not always a need for Antilag for a street car , why cant you just set up a normal 2step ? If so thats exactly why your blowing your turbo to ****. Thanks for the more accurate description on your problem. Stop using the antilag and your turbo will last longer
Or change to a full dual ballbearing oil/water cooled imo, i m no expert just some of these situations I or know someone who has had similar problems.

 

He means 2 step. True antilag is when hes off the throttle and wants to keep the turbo spooled, its a road/rally racing technique, not for drag.

 

precision turbos are garrett chra's so i'm not sure why you're so mad over precision.

i'd run a restrictor for both journal and ball bearing turbos.

 

+11ty ^^^^ and utilizing antilag isn't a bad thing, but it does put extra wear on your turbo. constant spooling during daily street driving is not the best, but is the answer when it comes to all out road racing.

 

I'm not so sure about that...... Garrett and Precision parted ways like two years ago. I know Precision doesn't use Garrett turbine or compressor wheels, at least from what I have seen. So that would mean they are using someone elses, which means they have to change the bearings or other related parts. So, things are no longer to the same specs/tolerances as Garrett parts.

 

I would NOT run a restrictor on a journal bearing turbo. Worst case, there's too much oil and you blow some out. Then you can add in a restricitor and it'll be fine.

In your case, you're running a restrictor which may be starving the turbo of oil, and bye-bye bearings.

 

some of the ball bearing ones are, but many arent and all the journal bearing turbo's are precisions own.

im so mad with precision because i had 2 of their turbo's perform like garbage and explode on me for no good reason with less than 2,000 miles on each. not only was my time and my tuners time wasted, i lost a ton of money between the turbo's and tuning. well over $2,000 not including puking oil over a $300 wideband twice.

swapped to a garrett and lived happily since.

 

The Precision TE44 journal bearing on my Syclone is finicky about the size oil feed you give it too. Hell it started smoking once when I put a thinner oil in. In fact - the only turbo center section I have seen that you can give a garden hose dose of any oil to without any problems are Holsets. Pretty much everything else I have run across can only handle a -3 AN feed max and even that is dependent on the weight of the oil.

 

your obviously doing something wrong. and subarus have horrible oil pressure to begin with. and not running a restrictor on a journal bearing is a crap idea. ive done it as a recommendation from someone. didnt turn out so nice.

but precision arnt using true garret cores anymore.