Ok,
My name is Dennis, built a turbo kit about a year ago, just finished a couple months ago. The turbo that i used was a never fired, brand new precision 78mm/.96ar exhaust. I made 9 1/4 passes, and maybe 20 street miles or so (to work a few times). I was told by many people here on tech that that particular turbo has to small of a exhaust turbine for my cubic inches (383) so I pulled the turbo and sold it to go bigger. Sold it to a member on here, and am trying to straighten all this out. He pulled the exhaust housing to confirm the 75mm wheel and it was, however, two of the turbine fins are bent...Now this turbo came off of a car that went 9.90 on low boost (10.5 psi) and was working flawlessly when I took it off. I will post pictures below and show the issue. Can this be fixed or just rebalanced? Please let me know what you think but be reasonable. Thanks.

Dennis

http://s152.photobucket.com/albums/s...t=IMG_0467.jpg

http://s152.photobucket.com/albums/s...t=IMG_0469.jpg

http://s152.photobucket.com/albums/s...t=IMG_0470.jpg

http://s152.photobucket.com/albums/s...t=IMG_0475.jpg

 

Maybe they do it for balancing? Just a thought, subscribing

 

need pictures of the inside of the housing, it could only have bent that way by a person or contact with its surroundings and most def not for balancing. You say the turbo was brand new never fired, did you purchase it from a manufacturer or a person?

 

Did you have it balanced before you put it on ur car and ran it?
Im because if it was new and you never took it apart and it ran fine (no oil or noise issues) then I dont see the problem. Either thats how they balanced the thing or he dropped it after it was apart while inspecting and is now blaming you but I hope thats not the case obviously.
At least thats what I get from the pics, hard to tell in most...

 

I am the buyer, and I did not drop or do anything to the turbo. I am an honest guy and am glad Dennis is being a good seller.

I was just verifying it had the 75mm turbine and that is what I found.






I have had many turbos apart and they don’t look like this unless something has been run through it.

Too me it seems it was apart at one time and new bearings put in and nothing done with the fucked turbine. Then the guy pawned it off to dennis.

We really just want to know what the best option is best for the both of us.

 

I bought it new or so I thought, from a person, not a dealer. Was in a precision box, still in plastic. Ran it at 10 psi for a couple weeks to and from work, and 9 1/4 mile passes, best of which was a 9.90 @136 in a full weight car with a nitrous gear and converter (4400 stall and 3.90 gear on a 26" tire. Was definitely making great power, but no idea whats goin on with the fins....Maybe Zac can get pics of the housing as he has the turbo in ND now? Also said the fins are different lengths? Is that normal? And the fins that are bent are a fin apart...example, bent fin, good fin, bent fin.....then 3 good fins

 

If you look closely at the outer edge of the turbine fins you can see they made contact with a housing at one time, which IMO supports the conclusion it had a bearing failure at one time in its life

Also note the scratches on the heat/carbon cover right beneath the turbine??

 

Bearings are nice and tight and no contact with the turbine housing

 

and it had no oil or noise issues....turbo was incredible....best thing i ever did by far, but needed a bigger exhaust housing.....Turned into a lot bigger of a deal then it was supposed to....

 

could also be an turbine housing that is not on correctly. If they are not seated flush, they will contact on one side.

 

Not worried so much about how it happened as to if it's fixable or will need a brand new wheel and center section, or can they just re balance it........Except with it being the weekend, no one is going to be working pry til monday......

 

Like said previous.....The turbine wheel exducers fins have touched the housing. Could have been cause when whomever rebuild it and f*#ck up that fin. Which could have cause the inbalance in the wheel which cause it to touch the housing. That turbine wheel is gone though. You'll need a replace if you don't already know. The turbo will eventually self destruct if not.

 

I have read a lot of people saying as long as there is no material missing, that the balance should be able to be restored and the turbo will be fine....is this not correct? I'm guessing the main dealers will say that its completely junk, but so many people say they are repairable with such small damage......just want to find out for sure.

 

Its is not so much the two bent fins that worry me it is the fact that three fins are shorter than the rest. How that is possible I have no idea

It is clear as day if you spin it by hand and watch or if you mic it.

Here is a normal one



And one of the short ones


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It goes bent fin, normal fin, bent fin, then three consecutive fins that are shorter


All fins have made contact at one time

 

Would the shorter fins be from balancing? trimming fins off the heavy side for balancing??

 

Balancing the turbine is done by grinding on the nut end of the turbine. I think the fins can be clipped? Just by looking at the photos. It seems like you'll need atleast a new turbine shaft/wheel and a rebuild. Hopefully for your sake the compressor wheel did not kiss the compressor housing. Then the turbo is for parts. Either which way. It's going to cost at least 1/2 to 3/4 of a new one. This is the reason why I try to stay away from used or rebuilt turbos.

 

I guess I want to know what you guys think is fair??

I paid $1000 bucks for it and could of had a brand new one a couple hundred more


Is it fair to for me to ask for a full refund and then me ship the turbo back?

Or ask for some money back so i can have it repaired? if so how much?


I guess i paid a grand for it and i don't want to slap a ticking time bomb on the car

 

i had this EXACT issue when i bought my PT88. Me being a tweaker about all my ****, i pulled the comp and exh housings off to inspect the wheels and sure enough... The hot side had bent blades and you can see the impeller ate something at one point or another. I made the seller refund me $300 of the paid $1000 for it to cover repair costs. I got lucky and the seller was cool as **** when i presented the photos to him.

 

thanks for the input guys

I made a short video to hopefully capture what is going on, it is still hard to see in the video compared to real life

turn the sound up and watch the turbine inducer carefully

the other turbo with the red backing plate is my old TC78


http://www.youtube.com/watch?v=IaD3gK0nZQs

 

I have no problem fixing what is wrong if it needs to be fixed, and i already told Zac that it will be taken care of. I believe the only thing that is wrong is the bent fins, the shorter fins i'm almost positive are from precision themselves. There is no way the fins just made themselves shorter. That is why I would like one of the big turbo guys to chime in. Dr. Turbo, jose at forced inductions...and get a real dealer opinion. I am not a shafty guy, I sold the product, obviously thinking it was in perfect working order, as it came off of my car working flawlessly......Thanks to all who had input though, anything helps....Even in the video, the tc78 has a little bit of difference between the fins...just not near as much as the pte78.