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+--- Thread: hybrid turbo gt20 (/showthread.php?tid=20442)
hybrid turbo gt20 - Chris_90 - 14-01-2014
So just stripping my gt20 down and was thinking couldn't you fit a gt2252 turbine to it if you had the cold side merchined to take it?
Would this make an epic spooling turbo but flow loads of air?
I might be talking rubbish as I don't no much about this stuff but if it is possible and the costs arnt massive it could be pretty epic,
So what you guys think?
RE: hybrid turbo gt20 - zx_volcane - 14-01-2014
short answer no (unfortunately)
RE: hybrid turbo gt20 - Chris_90 - 14-01-2014
(14-01-2014, 05:25 PM)zx_volcane Wrote: short answer no (unfortunately)
Oh worth a ask, anything I can do to it to upgrade it why I rebuild it?
hybrid turbo gt20 - zx_volcane - 14-01-2014
Are you actually rebuilding the core or just clocking the hot / cold sides?
Again, not much worth doing tbh without incurring cost. You could up the comp wheel to a 56 perhaps but you'd need the housing to match, and potentially rebalancing the core, unless you're certain the wheel has been balanced as a component
RE: hybrid turbo gt20 - Chris_90 - 14-01-2014
(14-01-2014, 05:58 PM)zx_volcane Wrote: Are you actually rebuilding the core or just clocking the hot / cold sides?
Again, not much worth doing tbh without incurring cost. You could up the comp wheel to a 56 perhaps but you'd need the housing to match, and potentially rebalancing the core, unless you're certain the wheel has been balanced as a component
We'll I've took it to bits to clock it and it has oil in the cold side not much but a dusting so thinking of just rebuilding the core new oil seals etc so I no it's ok. Think I will leave upgradeing then. Just re-build the core so I no it's all ok.
hybrid turbo gt20 - zx_volcane - 14-01-2014
If there isn't any worrying play I'd leave it be
If it ain't broke ...etc
RE: hybrid turbo gt20 - Chris_90 - 14-01-2014
(14-01-2014, 06:06 PM)zx_volcane Wrote: If there isn't any worrying play I'd leave it be
If it ain't broke ...etc
There is but only a small amount? Still worth doing
RE: hybrid turbo gt20 - Ruan - 14-01-2014
Little point in swapping to a GT22 hotside with a 52mm coldside... You'd be better off swapping the 52mm compressor for a 56mm compressor... Making a GT2056...
More hassle than it's worth though, you'd have to strip it down, replace all the bearings, get it VSR'd, find a compressor housing that actually fits...
RE: hybrid turbo gt20 - Chris_90 - 15-01-2014
(14-01-2014, 09:43 PM)Ruan Wrote: Little point in swapping to a GT22 hotside with a 52mm coldside... You'd be better off swapping the 52mm compressor for a 56mm compressor... Making a GT2056...
More hassle than it's worth though, you'd have to strip it down, replace all the bearings, get it VSR'd, find a compressor housing that actually fits...
Yer think It best to leave it as it is.
Next question when when rebuilding it (new oil seals bearing etc) do I need to get it balanced or can I just mark the shaft and compressor wheel but it back on in the same place?
RE: hybrid turbo gt20 - Chris_90 - 15-01-2014
(15-01-2014, 07:02 AM)Chris_90 Wrote:(14-01-2014, 09:43 PM)Ruan Wrote: Little point in swapping to a GT22 hotside with a 52mm coldside... You'd be better off swapping the 52mm compressor for a 56mm compressor... Making a GT2056...
More hassle than it's worth though, you'd have to strip it down, replace all the bearings, get it VSR'd, find a compressor housing that actually fits...
Yer think It best to leave it as it is.
Next question when when rebuilding it (new oil seals bearing etc) do I need to get it balanced or can I just mark the shaft and compressor wheel but it back on in the same place?
Any one?
RE: hybrid turbo gt20 - zx_volcane - 15-01-2014
What more info do you need over what myself and Ruan have said?
You either go balls in, put a cheap ebay copy rebuild kit on and not balance it, and hope for the best - tbh I'd only do this if you think the turbo is shagged anyway and you've got nothing to loose.
Or you get a genuine garrett rebuild kit and have it VSR'd, but for the money you may as well get a refurb core on an exchange basis from a reputable company. Because the chances are if you've got play, or oil passing or whatever, you may have damage to the shaft too.
Unless its passing a crap load of oil or has serious play I'd just leave it alone. I don't see the point rebuilding it with none oem parts just for the fun of it.
If you mark the compressor wheel relative to the shaft / turbine and get it 99% back in the same place you shouldn't be too far out. You have to think that any turbos with damaged blades will be effectively out of balance too. It will just shorten the life of the turbo to some degree depending on how far out it is. These things spin up to insane rpm.
Theres a chance too that the turbine and comp wheels are balanced individually - I'm 90% sure they are on my gt2260v for example, so its not as big a deal swapping bits around
RE: hybrid turbo gt20 - Chris_90 - 15-01-2014
Oh right I will just leave it then, worst comes to worst I have to buy a new core for it, thanks for info
RE: hybrid turbo gt20 - zx_volcane - 15-01-2014
The way I see it, if you're going to kill the turbo you're going to kill it catastrophically, I'd be tempted to have another identical one as quick bolt on spare if / when the situation arrises.
RE: hybrid turbo gt20 - Ruan - 15-01-2014
(15-01-2014, 08:14 PM)zx_volcane Wrote: Theres a chance too that the turbine and comp wheels are balanced individually - I'm 90% sure they are on my gt2260v for example, so its not as big a deal swapping bits around
They're statically balanced, but when it's spinning at over 200,000rpm, dynamic balancing IS important, you have to balance the assembly as a whole...
You can't balance an assembly as a whole with only one part... Especially with the tolerances required at over 200,000rpm...
Hence yes, replacing wheels is all nice, but unless you VSR it, it's likely to end up with your engine eating a compressor... Especially since GTs run seriously small shafts to reduce inertia...
RE: hybrid turbo gt20 - zx_volcane - 15-01-2014
(15-01-2014, 08:49 PM)Ruan Wrote:(15-01-2014, 08:14 PM)zx_volcane Wrote: Theres a chance too that the turbine and comp wheels are balanced individually - I'm 90% sure they are on my gt2260v for example, so its not as big a deal swapping bits around
They're statically balanced, but when it's spinning at over 200,000rpm, dynamic balancing IS important, you have to balance the assembly as a whole...
You can't balance an assembly as a whole with only one part... Especially with the tolerances required at over 200,000rpm...
Hence yes, replacing wheels is all nice, but unless you VSR it, it's likely to end up with your engine eating a compressor... Especially since GTs run seriously small shafts to reduce inertia...
I think that pretty much sums it up, its a ball deep situation unless you're VSR ing the complete assembly!