Is my turbine and compressor wheels too small?

[rabbitman]

Ok most of you know I'm having a lack of boost situation, I'm rather new to turbo's and don't have another good one to compare so I need some of the experts to look at these pics and tell me if this looks good or bad.









Thanks

[rabbitman]

Thanks Andrew, that's what I needed to see

So I wonder why I got such a big gap?
My only guess is the PO mustuv burned, melted or broke some blades and filed 'em even so it wound't be noticeable. Or he swapped wheels with another one before selling it, I bought it on ebay but that was 2+ years ago, no way to trace it.

So what are my options? New wheels? Or is there a way to shim 'em out? I highly doubt it.

Any input would be greatly appreciated.

[blackdogvan]

Looks fishy...

[rabbitman]

I don't have time right now to pull the turbo....and I'm tired of it .

Is yours a GT1749VA?  Do you have calipers?  Can you measure your housings and fans and I'll tell you if it's the housing or the fan. 

Probably most cost effective would be to get a replacement turbo or center section.

Andrew

Andrew, I measured the exhaust housing, 1.44 inches, probly not nearly enough info. That number isn't on my turbo anywere, here's a pic of the tag on the compressor. When I get a chance in the next few days I'll pull it and get real measurments. To measure the fans I just need to measure the back plate diameter?

Looks fishy...

I think it is......nothing looks worn or ground.....I'll figure it out sometime.

Thanks

[OM617]

That compressor is trashed and the turbine is either not right for the housing or worn down from housing contact. Either way, get that ting off your engine asap.

[Rabbit on Roids]

lol, a good VNT should give you 30+ psi with really crappy fueling. mine is so worn i was getting 15 out of it with crappy fueling, then i build a good turbo pump and i get almost 30 out of it. so i imagine you could get over 40 psi out of one of these buggers.

[rabbitman]

Yeah I'm just sick of messing with it. One problem is I don't know were to get another turbo that'll bolt to the euro manifold I've got and I don't want to get the one piece mani/housing that is more common because that would require that I make another DP .

I think the PO "rebuilt" it, maybe a new bearing is all because as is the wheels can't hit the housing.

I'm driving it now I just don't "hot rod" at all....or very much.

I looked on prothe's website which is the only place I've found new center cartridges for the vnt15. He's got different ones for the ALH and european AFN, mine is from an AFN.
So I wonder if the PO installed a center piece from an ALH vnt15? The price is $199 for the AFN and $249 for the ALH, sounds too cheap, perfect for my budget though . Maybe I should try to get some measurements from him. Thanks

[rabbitman]

Does anyone know if the vnt shares parts with other turbos? From what I've found, I "think" a GT15 is like a vnt-15 minus the vanes Most likely I'm wrong though. I just wondered if the fans from a GT15 would fit is all.

Or I could order it from prothe .

[rabbitman]

Well I emailed prothe and found out that the only difference between the ALH and AFN centers is the location of the vane lever, probably means I can't use an ALH center because then I'd need a new vane "control ring" so it would mesh with the lever. I'll measure mine soon hopefully so I know if a new cartridge would even fix it. MAN, I'm still tired of pulling it and it's been like two week since I've had it out .
The dream of having some tolerable power keeps me going though

[rabbitman]

It's tempting to just get a north American vnt but I spent WAY too much time getting the DP to fit, I figure that as different as they are I'd have to start over. I'll definitely let you know if I do decide to get rid of it.

I've noticed a sort of two tone turbo whistle coming from the turbo, as I push the pedal a really high pitch that quickly goes out of hearing range and then almost immediatly a lower pitch starts up and I can barely hear it at my full boost of 2psi.......yeah I know I should just fix it.....I keep wishing it would fix itself though

[jtanguay]

thats a shame about the turbo... the noise you're hearing is the pressure leaking past the blades   the turbo is probably doing more harm than good the way it is.  i'd definitely hit prothe up for a center cartridge if you can confirm it will work.  people can talk trash about those turbo's all they want, but they do have quality control.  just make sure you don't go too crazy with boost and it should be fine.  even the expensive 'oem' turbo's can fail and destroy an engine, so i personally think its a toss up.

i wouldn't pay more than $400 to get your turbo up and running.  for that price you could get a real nice vnt20 off of a diesel jeep, and never worry about destroying the turbo (you'll destroy your engine first  )

[Rabbit TD]

thats a shame about the turbo... the noise you're hearing is the pressure leaking past the blades   the turbo is probably doing more harm than good the way it is.  i'd definitely hit prothe up for a center cartridge if you can confirm it will work.  people can talk trash about those turbo's all they want, but they do have quality control.  just make sure you don't go too crazy with boost and it should be fine.  even the expensive 'oem' turbo's can fail and destroy an engine, so i personally think its a toss up.

i wouldn't pay more than $400 to get your turbo up and running.  for that price you could get a real nice vnt20 off of a diesel jeep, and never worry about destroying the turbo (you'll destroy your engine first  )

I can't imagine where you all find these turbos all the time for those prices.  Around here the junkyards wouldn't consider selling a turbo off a good engine.

[jtanguay]

thats a shame about the turbo... the noise you're hearing is the pressure leaking past the blades   the turbo is probably doing more harm than good the way it is.  i'd definitely hit prothe up for a center cartridge if you can confirm it will work.  people can talk trash about those turbo's all they want, but they do have quality control.  just make sure you don't go too crazy with boost and it should be fine.  even the expensive 'oem' turbo's can fail and destroy an engine, so i personally think its a toss up.

i wouldn't pay more than $400 to get your turbo up and running.  for that price you could get a real nice vnt20 off of a diesel jeep, and never worry about destroying the turbo (you'll destroy your engine first  )

I can't imagine where you all find these turbos all the time for those prices.  Around here the junkyards wouldn't consider selling a turbo off a good engine.

ebay   those vnt20's come up once in a while.   

[Rabbit on Roids]

LMFAO @ the 2psi boost. that turbo is trash. and i thought my seals and bearings were bad!

[rabbitman]

I'm ripping it off today and measuring stuff

... the noise you're hearing is the pressure leaking past the blades   the turbo is probably doing more harm than good the way it is.
i wouldn't pay more than $400 to get your turbo up and running.  for that price you could get a real nice vnt20 off of a diesel jeep, and never worry about destroying the turbo (you'll destroy your engine first  )

I didn't think that "whine" sounded right.

Yup, EGT's are higher just cruising and it's got less power then before.

I think I've got a little over $500 into it so far , after getting a new center piece I'll be up to 700 , it's spread out over 2 years so it's not too painful to think about.

VNT stuff is impossible to find up here in junkyards and there's never any swaps that I know of so I pretty much have to order from down south .