Yes another EVO GT thread (but i own one, or did so I can give input on it)

[1993TalonTsiAWD]

So anyway after getting my engine problems sorted out. (Lots of money there) my car decides to act up. Now I'm at the edge of the cliff with this car already. It had just drove 600 trouble free miles. So I wasn't sure what to think.

Anyway here I am on army trail in west chicago. I hit 15psi or so (it always drops off) and then, nothing. I try and get it to boost, but only 2psi will show. So I limp it home at 35mph. It almost dies at every stop sign and stop light. Vac is at 10 or 5 most of the time at idle. Having a hard time getting it home. At this point I decide to take it to the only place I trust AMS (even though I'm sure there sick of me, but not making money off me ). The only bad thing is. The car would only go about 45max anymore and it would run like total crap. So I decide to go at around 11pm at night. It takes about 1hour and a half or a little less. I almost also get ran over by a semi backing up(that would have been fun)So I get it there, the whole time watching the logger for any problems. The next day I call AMS and there not to happy with me dropping it off without telling them.(which makes since). I wasn't thinking at the time and just acted. I mean it's my dd and I really had no other way to get it there, and I wasn't going during rush hour or lunch time, that would have been hell. Anyway AMS calls and says they found the problem. I have a few guess, but they say it's the EVO gt. Now the turbo only has 2500 miles with oil changed on it about 4 times in that period. So i ask whats wrong with it. They say it seizes and then spins again. Which does make since. You see sometimes when I would go out, the first time I boosted it would like stall and nothing then it would boost, but not very strong and would drop off. I'm hoping the new evo mitsu one holds strong to redline. So anyway I will get pics up of the damage when I get the turbo back.

But I want to be sure, would a bad turbo effect low throttle,idle,top end (like it's running out of steam?),and like it's only running on two cylinders?

And my final advice GO 50-100 MORE FOR THE REAL THING. don't even chance it with the evo gt knock off,because I'm proof of them failing at 2500 miles with ok oil pressure.

And yes the evo mitsu one is ported and a 34mm waste gate flapper is installed so creep won't be a issue for quite a while.

And yes people think I'm crazy for sinking 10000 in the car and it still runs 14's, which does suck, but that money I spent on my second turbo was my exhaust money. Maybe some day the injectors,FMIC,dsm link or safc,wide band,and others will be added, but for now I can't spend anymore.

And yes I did do the fast+expensive,but it hasn't =reliable yet........still waiting............

Derek

 

[subiekillrGST]

Sorry to hear about that man, I have a EVO 3 GT turbo and it is running strong still. I have heard mixed messages about this turbo and it's too bad you had to see the bad side of them. I hope everything works out for you man, have fun with the new turbo.

 

[Thomas91169]

the GT's are hit or miss. sorry you missed, but at least you got some good miles on it with no problems.

but a dead turbo will do the symptoms you said. its basically a huge intake and exhaust restriction when its fried.

 

[chicagoavenger]

It's under warranty so there should be no probs. Take it off send it in get another one. Bad thing is your DD will be down for a bit good luck.

 

[shpyder]

SlowBoy Racing goes to considerable lengths trying to forewarn people about these GT turbos. Most stuff made in China (close your eyes and randomly reach out to touch something: it'll probably be made in China) is actually pretty good quality and exellent dollar value, but something as complex as a turbo, I'm not sure.

I do believe after a few years, or even months in the turbo game, they'll start making good turbos, but I'd steer clear of them at present: I just tell people to spend a few extra bucks and get the MHI. It's good that yours is still under warranty, but imagine what a badly desinged turbo can do to your block if the shaft fails or the blades chip.

And yes people think I'm crazy for sinking 10000 in the car ---1993TalonTsiAWD

Don't feel bad man, I just blew away $10,000 too on a ridculous 6-bolt swap. Couldve been done cheaper, but oh no, I needed that "race" motor with all the goodies. I couldve done a stock 6-bolt swap, AND bought an old 3000GT SL for the money. But yeah, some DSMers are more retarded than others, and I'm a prime candidate .

 

[subiekillrGST]

The EVO 3 GT is made in Taiwan, not China and I have heard of many people running those turbos for a long period of time, this guy just happened to see the bad luck of buying this turbo. Also did you have a SS oil feed line on your EVO 3 GT?

 

[1993TalonTsiAWD]

I have got some more news. It seems that something entered the intake some how and damaged the fins. Now that means the turbo itself is not at fault. Also I didn't buy the turbo new, the guy said it was, but it was not, so he could have bent the fins long before I bought it. I still will never buy one regardless. I will get pics up tomarrow when I pick up my car. I want to see the damage as bad as you. I don't see how I could have gotten anything in the intake track, so I;m not sure how I could damage the fins. Pics will tell.


Derek

 

[Wanted:SWGSXAWD]

I wonder if it was from compressor surge by the previous owner ?

 

[1993TalonTsiAWD]

Here are some of the pics.At first I blamed the turbo, but as you can see something else was the cause. AMS said something got sucked in. I find that hard to believe, since the rubber piece was tossed out years ago, and I can't think of anything or any other way something could get in there. I will talk more with them on Monday. I think it may be compressor surge. But I'm not sure why it would damage the fins so bad. I feel if something was sucked up I would have noticed it from day one. You see my old 14b was bad shortly after I got the car running. I thought it was just old age. Now my old EVO GT wore out in about 2500 miles, which makes no since to me. How could the turbo suck anything in when I haven't touched the intake? It's stock(won't be for long). I just hope that it really never had anything enter the engine, because I know I didn't do it. I'm very anal about things like this. When I did the turbo swap I read on how to do it for about 2-3weeks before I even did it. I just want to figure out what caused it, so it doesn't happen with this one.

I can't be buying a 750 dollar turbo every 6months to a year.

So I need your help in figuring this one out.

I'm starting a new thread on turbo theory, and we'll go from there. I have a lot of questions and need to start a new thread to ask them all.

Steve I really need your help on this one.

Derek

 

[1993TalonTsiAWD]

Here they are. Can that be caused by compressor surge?

 

[sbiggi]

You may have not really sucked anything in other then the chips from the broken blades.

If the bearings go and the compressor wheel hits the housing it will start to chip away. When that thing is spinning 100K rpm and a small piece of anything hits it, the blades will lose.

From your description it sounds like the bearings failed and caused the compressor to hit the wall and destroy its self. I had two turbos go that way, except the 2nd one I relized what was going on before it got damaged bad.

 

[1993TalonTsiAWD]

So what was the cause with your other turbos then. Was it oil lines, or a bad bov, or what.

Can compressor surge cause that damage at only 15psi, for about 3-4months? Or about 2500 miles? I know it can damage the bearings.

How can I check the BOV, I never hear it, and think it may be bad, also what effects will stock exhaust have on my car with the EVO at 15psi?

thanks Derek

 

[92redman]

Big boost leak causing the turbo to spin too fast?
Are you sure you have good oil pressure at the turbo? Maybe a blockage in the feed line or perhaps the head, that's what took out my stock turbo, of course the shaft was just broken off at the turbine wheel and the compressor wheel looked perfect.

 

[AMS Eric #2]

Derek you said you threw the rubber ring out? I actually found about half of it left around the inlet of the turbo. It may be a good possibility that part of that thing got sucked in there and started the damage. I know people wouldnt think a piece of rubber could cause that much damage, but compressor wheels are usually cast alluminum and spin at 120k+ RPMs. If ANYTHING touches it at that speed, sh*t will hit the fan (no pun intended)!

After I installed the turbo, i actually exchanged your boost controller with another one that has a bigger bleed hole and a lighter spring, (yours was a pre-modded one that the bleed hole was too small and it had the heavy spring in there for the Evos, both of which will cause spiking and boost falling off issues). The best I could tell after I drove it was it would go to 16 psi and hold 15 for most of the gear.

Hope everything is doing well with it now.

Eric #2

P.S. GET SOME DAMN EXHAUST FOR THAT THING!! It will raise the boost big time and gain ALOT of horsepower!

 

[1993TalonTsiAWD]

No one ever told me anything was found, if thats the case. Then I know how the turbo went. Which is good. But since were on that topic the car won't handle 15-16psi. I did a log last night and got 43counts of knock at 5600 rpm. I know now I don't have the fuel needed so I turned it down to about 13psi or so. And yes I did see you put a different spring in. Thats fine I never said it's not holding boost. I just want to know that the new turbo won't go,because I can't afford anymore Major probelms. It still is sorta stalling or freezing up at first, then it takes off, and yes the engine is at operating temp before I ever boost. I'm not mad or anything, I just want to make sure that turbo will last. And yes exhaust would be nice, but when you just blew that money on another turbo, thats hard to come by.

So if you guys found a rubber piece then good I know it died that way, and yes I know any object will do damage to the compressor wheel at 125k.

Last but not least I still wonder about the bov, I can't hear it at all. My friend has a stock gst and you can at least here it. It's probably nothing, but I don't like to chance things.

Anybody want a new well "broken" in turbo

Derek

 

[GST with PSI]

Derek, didn't AMS install your MBC backwards? can't expect them to do everything for you. you only spent $7000.

 

[1993TalonTsiAWD]

I spent that much to have it done right by the best. I could have done it all myself, but I'd rather it be done right. I'm trying to prove that I made the right choice letting the pros do it, rather than myself to make sure it was done right the first time.

Sure I'm not 100% satisfied,but I won't go bashing them on this site. All places make mistakes, it's how a shop deals with them that sets them apart from other shops.

I just want to make my goal of 300HP, but have a ways to go. If I don't have to buy any more parts I have already replaced I may be able to get there, by the age of 55, we'll see.

Right now this exhaust issue sucks. I need to find 45 and 90 mandrel bends. Yes I'm making it myself, can't afford one now, and I need one badly.

Derek