Turbo still doesnt boost.

[Boosted98gsx]

heh, no more turbine for joo!

 

[delta448]

Does it have any shaft play now?
-Just kidding... I know,... it's not funny. That really sucks.

Sorry for your loss, but at least now you have a good reason to upgrade.

Just remember to ditch that ruined cat.
Now clogged with 80% more turbine blade chunks.

 

[GsxEcutioner]

yup, its all good, putting my ebay 16g back on, just until I can afford a new turbo..
-shane

 

[GsxEcutioner]

I put the 16g back on, but still no boost, I really need to get that cat cut off -___-. ahaha

 

[GsxEcutioner]

btw, question. Can the Cat being melted/not flowing blah blah, cause the Wheel on the turbo to snap like that? Was that the cause???? if it is, then thats what did it right?
-shane

 

[juanpac0]

btw, question. Can the Cat being melted/not flowing blah blah, cause the Wheel on the turbo to snap like that? Was that the cause???? if it is, then thats what did it right?
-shane

Trying super hard, too much backpressure, bouncing pressure off the turbine wheel, could be a ton of stuff. You still want that turbo? I'll take it off your hands if you dont, .

 

[GsxEcutioner]

Trying super hard, too much backpressure, bouncing pressure off the turbine wheel, could be a ton of stuff. You still want that turbo? I'll take it off your hands if you dont, .

its cool, I gave it to my friend, hes going to rebuild it. , Tre3zy called me, are you coming out tonight Yuri?
-shane

 

[juanpac0]

its cool, I gave it to my friend, hes going to rebuild it. , Tre3zy called me, are you coming out tonight Yuri?
-shane

Lol gl rebuilding it, I was gonna use it as a paperweight. Yeah I'm coming out tonight, but I'm boutta drop my transmission.

 

[GsxEcutioner]

Lol gl rebuilding it, I was gonna use it as a paperweight. Yeah I'm coming out tonight, but I'm boutta drop my transmission.

fasho, i may come out tonight if i get the cat done....

 

[GsxEcutioner]

Boost like a bat out of hell, Gutted cat this morning, car flies but hits fuel cut, time to start tuning =] ahaha

 

[rush2252]

Dayum. So was the wheel melted or did the shaft sheer? Because if that was an MHI the exhaust wheel should be attached to the shaft. Justing posted some pics the other day thats why I stated the wheel couldnt have fallen off if you didnt have shaft play.

What the hell did you do to that poor turbo WTF

 

[delta448]

btw, question. Can the Cat being melted/not flowing blah blah, cause the Wheel on the turbo to snap like that? Was that the cause???? if it is, then thats what did it right?
-shane

Not likely. Turbos extract work from the energy of the exhaust. When there is a higher flow across the turbine, the turbo spins faster. A higher flow level can be accomplished by eliminating restrictions after the turbo, not by adding them.

Think of it like this, if the pressure in the exhaust manifold was pretty close to the pressure after the turbine and before entering the cat, do you think very much exhaust energy would be available to spin the turbine? What about if the pressure in the manifold was 5-10 times the pressure after the turbine wheel? The clogged cat may have been the only thing keeping the turbo together this long.

Whole system exhaust backpressure is never a good thing. Especially on a turbo engine.

What the hell did you do to that poor turbo WTF

Looks like it had been shaving the housing, so something was out of balance or bent. Probably causing the noise he heard at the beginning. I'm sure that when he dropped the downpipe, saw big boost and oil pressure, that's likely when the bad oil seals really failed in their duty. Then the CHRA puked even more oil everywhere and the shaft started doing the harlem shuffle.

But Jus might be able to diagnose it better. I'm just wondering if the compressor side didn't shit the bed as well.

 

[GsxEcutioner]

Dayum. So was the wheel melted or did the shaft sheer? Because if that was an MHI the exhaust wheel should be attached to the shaft. Justing posted some pics the other day thats why I stated the wheel couldnt have fallen off if you didnt have shaft play.

What the hell did you do to that poor turbo WTF

cat melted, and shot all of it back towards the turbine wheel I think, because The shaft cracked...... no more wheel

 

[GsxEcutioner]

Not likely. Turbos extract work from the energy of the exhaust. When there is a higher flow across the turbine, the turbo spins faster. A higher flow level can be accomplished by eliminating restrictions after the turbo, not by adding them.

Think of it like this, if the pressure in the exhaust manifold was pretty close to the pressure after the turbine and before entering the cat, do you think very much exhaust energy would be available to spin the turbine? What about if the pressure in the manifold was 5-10 times the pressure after the turbine wheel? The clogged cat may have been the only thing keeping the turbo together this long.

Whole system exhaust backpressure is never a good thing. Especially on a turbo engine.


Looks like it had been shaving the housing, so something was out of balance or bent. Probably causing the noise he heard at the beginning. I'm sure that when he dropped the downpipe, saw big boost and oil pressure, that's likely when the bad oil seals really failed in their duty. Then the CHRA puked even more oil everywhere and the shaft started doing the harlem shuffle.

But Jus might be able to diagnose it better. I'm just wondering if the compressor side didn't shit the bed as well.

btw thats a 14b turbo too , uhm no i still have that whining noise once in awhile, but its from a loose intake tract..........damn my boost set all the way out is 15-16 psi. I know its bad without a tune, and now my rpm wire failed on my safc
-shane

 

[rush2252]

if the whining noise is kind of a squeal its probably a leaky intake gasket. Mine started doing this and the boost was erratic and it would squeal under WOT.

 

[JusMX141]

A good buddy of mine ran a TD05H 20G coupled to a stock exhaust on his 2G TSi AWD in an attempt to break into the 12's with a full stock exhaust (unported 2G o2 housing, downpipe, cat, midpipe, muffler). The car ran this way for one full season, and he did indeed run a 12.8 at around 23psi.

At the end of the season we decided to rebuild the turbo because it was starting to develop a slight in/out shaft play. Upon disassembly we were shocked to find the inducer tips from all of the turbine fins were completely gone; no doubt caused by too much backpressure.

The car was tuned perfectly, and everything was in order otherwise. A turbine would not normally melt the inducer tips in such a short amount of time; I'm damn sure the restriction caused the damage.


Apply this theory to the extreme exhaust restriction that the OP is seeing, and it all makes perfect sense.

 

[GsxEcutioner]

my mbc was messed up too or something, Yuri hooked up my j pipe to the Actuator and it boost 9 psi, with the mbc it was showing 22 psi....
-shane