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Tune+nozzles+surging turbo=BOOM!
by
410
on 17 Aug, 2013 22:49
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I guess the vnt 15 couldn't handle all the abuse I've been throwing at it lately. I've been planning on ordering a vnt 17 for my golf and keep this one as a spare for the wife's car but there's no way this one will ever run again.
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#1
by
burn_your_money
on 17 Aug, 2013 23:50
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Did you remove it with a hammer or is that the way it failed?
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#2
by
410
on 17 Aug, 2013 23:55
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That is the way it failed. I reached down to remove the spring clamp and the compressor housing moved.
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#3
by
745 turbogreasel
on 18 Aug, 2013 05:07
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That is one way to lube your linkage.
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#4
by
theman53
on 18 Aug, 2013 08:31
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New center section and cold side it could make it LOL
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#5
by
410
on 18 Aug, 2013 09:06
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New center section and cold side it could make it LOL
That's if the exhaust housing is untouched. Vnt-17 has been ordered. I just hope the intercooler caught all the shrapnel. I really don't feel like changing the motor out right now.
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#6
by
theman53
on 18 Aug, 2013 09:49
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Did it give any signs of letting go or did it just go boom
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#7
by
burn_your_money
on 18 Aug, 2013 10:05
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What tune do you have?
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#8
by
libbydiesel
on 18 Aug, 2013 11:18
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FWIW, the VNT15 and VNT17 share the same exhaust side and center section (they are actually both gt17XXv turbos). The compressor is larger on the 17 and my understanding is that it makes it less likely to overspeed but more likely to surge.
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#9
by
410
on 18 Aug, 2013 19:25
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FWIW, the VNT15 and VNT17 share the same exhaust side and center section (they are actually both gt17XXv turbos). The compressor is larger on the 17 and my understanding is that it makes it less likely to overspeed but more likely to surge.
I am not sure about the hot sides or the center sections being the same but I have no specs to verify that. The compressors are different for sure but for some reason I thought the hot side is also bigger. I'll report back once I get the turbo. I also have a 1749va kicking around for comparison.
I have a pretty aggressive tune but I don't blame the tune at all. My drive to work is quite short and even though I drive quite aggressively, I have a problem with vanes sticking in a short period of time.
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#10
by
410
on 18 Aug, 2013 19:29
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Did it give any signs of letting go or did it just go boom
A few days before I noticed a slight, faint whine at higher boost levels. It never got worse and actually went away a bit. And then it just went bang on a second gear pull. Did you notice that the nut is still on the shaft?
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#11
by
theman53
on 18 Aug, 2013 19:48
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From what I have read there are 3 VNT 15 turbos. A 1749a, a 1749b, and a 1749c or is it va, vb, vc??? I cannot remember, but the 17/22 is as Andrew says. The 3 vnt 15's are pretty much identical, I guess they made small changes in the cold side and that was all. I think the "c" is the one everyone wants for performance. It has been a bit since I read about it, so I could be off on that.
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#12
by
libbydiesel
on 18 Aug, 2013 21:12
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FWIW, the VNT15 and VNT17 share the same exhaust side and center section (they are actually both gt17XXv turbos). The compressor is larger on the 17 and my understanding is that it makes it less likely to overspeed but more likely to surge.
I am not sure about the hot sides or the center sections being the same but I have no specs to verify that. The turbines are different for sure but for some reason I thought the hot side is also bigger. I'll report back once I get the turbo. I also have a 1749va kicking around for comparison.
The turbines aren't different. The compressors are.
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#13
by
RabbitJockey
on 20 Aug, 2013 07:41
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im thinking maybe he thinks the compressor wheel is the turbine? easy to mistake
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#14
by
410
on 20 Aug, 2013 18:21
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No I'm not confusing the turbine with the compressor. Like I said I'll compare turbos once the vnt17 shows up. The 1749vb is a little laggy from what I hear so imo the exhaust side is different. If the only difference is a bigger compressor side then it would be less laggy then the vnt 15.
Edit: Oops, apparently I did mix up the turbine and impeller. I was thinking compressor and wrote turbine. The previous post has been corrected.