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Old 08-27-2021, 01:19 PM   #1
02hybridwrx
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Default vf48 compressor wheel noise

Hey guys, so I have a vf48 I'm swapping into my 2.0 soon but I'm a little concerned with a couple of noises I hear when spinning the compressor. I've stumbled across a few similar threads, with honestly no answers that make sense to me. The turbo has next to no shaft, play, but if you apply some pressure upwards, the compressor wheel will slightly hit the housing, causing a "ting" noise. The thing is that everyone says "oh that's too much shaft play", but it really isn't; I'd say it's no more than a brand new journal bearing should have. I know for a fact it came off a running car, and have also checked out 2 other vf39's that did the same thing...

With that being said, is it runable? I personally can't imagine the wheel hitting the housing especially when oil tightens it up even more. Has anyone experienced this and slapped it on a car? Maybe there is an seating issue at the v-band area? how could it hit with such little shaft play? Thanks
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Old 08-27-2021, 01:28 PM   #2
K3rm1tth3fr0g
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if it can hit the housing, it's too much play - Period.

The fact that it came off a running car doesn't mean anything... Cars with spun bearings run.

Just pay to get it rebuild/upgraded by So-cal porting or somewhere similar.
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Old 08-27-2021, 02:01 PM   #3
benflynn
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If you have to try hard to hit it, and itís dry, and there is no ridge on the wheel it will be ok. You can get a journal bearing wheel to touch of u try hard enough even when just kinda worn
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Old 08-27-2021, 03:03 PM   #4
02hybridwrx
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Quote:
Originally Posted by K3rm1tth3fr0g View Post
if it can hit the housing, it's too much play - Period.

The fact that it came off a running car doesn't mean anything... Cars with spun bearings run.

Just pay to get it rebuild/upgraded by So-cal porting or somewhere similar.
Think outside of the box please, which is why I positioned the possibility of improper seating at the v-band area. I'm not lying when I say the compressor has hardly any shaft play.
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Old 08-27-2021, 03:05 PM   #5
02hybridwrx
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Quote:
Originally Posted by benflynn View Post
If you have to try hard to hit it, and itís dry, and there is no ridge on the wheel it will be ok. You can get a journal bearing wheel to touch of u try hard enough even when just kinda worn
This is what I was thinking. There is absolutely no ridge on the wheel. I don't see how it's possible for a journal bearing to have less play than it does, which is why I was wondering about alignment of the housing... Thank you.
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Old 08-27-2021, 03:06 PM   #6
02hybridwrx
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I'm working on uploading a video to try and show what I'm seeing, but youtube isn't working too well with my GP7...
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Old 08-27-2021, 03:20 PM   #7
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Old 08-27-2021, 03:28 PM   #8
K3rm1tth3fr0g
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Quote:
Originally Posted by 02hybridwrx View Post
Think outside of the box please, which is why I positioned the possibility of improper seating at the v-band area. I'm not lying when I say the compressor has hardly any shaft play.
You're asking a mostly impossible question. We don't know if it'll be fine or blow up immediately. We are just guessing. I would not run a turbo where the compressor wheel touches the housing.

Run it and find out or rebuilt it for piece of mind.
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Old 08-27-2021, 03:33 PM   #9
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Quote:
Originally Posted by K3rm1tth3fr0g View Post
You're asking a mostly impossible question. We don't know if it'll be fine or blow up immediately. We are just guessing. I would not run a turbo where the compressor wheel touches the housing.

Run it and find out or rebuilt it for piece of mind.
I'm if anyone else has seen this with force being applied, and looking for results. Isn't it better to ask questions rather than hoping for the best?
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Old 08-27-2021, 03:34 PM   #10
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It looks fine to me. I think you are just pushing it too hard making it touch the housing. When there is oil and spinning forced, it will center itself out.
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Old 08-27-2021, 05:42 PM   #11
02hybridwrx
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Originally Posted by BlackFighter View Post
It looks fine to me. I think you are just pushing it too hard making it touch the housing. When there is oil and spinning forced, it will center itself out.
That's what I'm thinking too...

The weird thing is that my vf39 has more shaft play, but more clearance, preventing it from hitting the housing. The vf48 has less clearance.
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Old 08-28-2021, 03:33 PM   #12
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New CHRA is like $350 from XSboost I would just do that.
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Old 09-03-2021, 08:37 AM   #13
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New CHRA is like $350 from XSboost I would just do that.
Are they known to be reliable?
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Old 09-03-2021, 09:10 AM   #14
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Are they known to be reliable?
Yeah they sell Melett CHRA's which are pretty much the only aftermarket brand that's very good. You could potentially also find Melett for sale on eBay although they typically come from UK.
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Old 09-03-2021, 11:57 AM   #15
aidanmurphy
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I got a vf52 CHRA from XSBoost with a billet turbine wheel and it has been AMAZING. Can't recommend enough. If you do go billet you would need a tune though

Also check for in and out play. When my VF52 went out it had some slight in and out play
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Old 09-03-2021, 02:09 PM   #16
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In and out is thrust play from thrust bearing
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Old 09-03-2021, 02:11 PM   #17
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Also, I think a gt3071r can be had reasonably enough, I sold my last one with vf52 style housings for 450
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Old 09-10-2021, 04:31 PM   #18
02hybridwrx
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FYI the car runs fine and dyno'd fine. I had my tuner check it out and he said not to worry since the play will go away with once it's hot with oil. Will update later on with how it holds up.
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