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Ok this may seem like a silly question, but I blew my turbo this week, and while I wait for the replacement 2nd hand unit to arrive (thanks Odessa) I decided to pull apart the old one to see how it works (its a rainy sunday in Tas, Im bored) and I discovered that the compressor wheel looks pretty untidy, the fan blades are ground off to the right shape, leaving the edges all messy, I have seen photos of compressor wheels with sharp fan blade edges so I wondered if I could tidy it up a little with some sandpaper, so I set about cleaning up a few blades...

Turbo1.jpg

Im not really expecting any gains, but I figure if I am trying to flow 165'ish kw through this little wheel a bit of a tidy up couldnt hurt? am I gong to do it any harm by doing this to the replacement turbo? is this part of what happens when a turbo is 'high flowed'?

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Yeah, ok before this thread gets silly :wave: , I dont have a lot of cash -hence the standard replacement, but what I do have is patience, and if this will give the new turbo a bit easier time of it then I will do the job...

Edited by Medium Dave
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I was thinking that too, but it dosent seem like they have gone to any great lengths to balance it from the factory, plus im not taking all that much off, just the dags from the grinding process...

Edited by Medium Dave
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If you modify the compressor wheel in any way its a sure fire way to cost yourself a turbo.

Balancing is the most important part of making the turbo and the slightest imbalance will cause it to die.

If the replacement turbo has damaged or worn blades it wont last very long anyway.

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Yeah, it was too much shaft play, I could move it enough to touch the exhaust side but I wasnt able to make it touch the inlet, hmm it seems it was on a bit of a self distruct mission :)

So what happens when a turbo gets a 'high flow' job?

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Yeah, it was too much shaft play, I could move it enough to touch the exhaust side but I wasnt able to make it touch the inlet, hmm it seems it was on a bit of a self distruct mission :happy:

So what happens when a turbo gets a 'high flow' job?

a gcg hi flow which in my mind is the best (only) option due to the the fact of the use of ball bearing! new wheels which are larger about t4 size i think, shaft gets ground down a tad and new oversize bearings and cartridges. heaps bigger on the turbine side same size as the housing, everything gets machined cleaned rebuilt everything is new pretty much. im runiing one of these and found it to the best option for the cost $1650 trade price and now running 240 rwkw on 16 psi with microtech and the usual bolt on stuff :yes:

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yeah my gcg highflow is awesome definately a very good option for turbo upgrade ;)

but yeah a healthy turbo comp wheel wont have shavings like that on it dude they would have happened when ur turbo failed or sometime not long before it.

if u opened up the turbo i sent you it wouldnt need to be cleaned up anyway, well i hope it wouldnt ive never opened it :happy:

ur like me though, patient and will fiddle around with stuff :)

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