is this turbine ok?
#1
Elite Member
Thread Starter
iTrader: (4)
Join Date: Dec 2009
Location: Reno, NV
Posts: 3,686
Total Cats: 95
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I am planning to attempt to rebuild one of my T2 turbos for my first practice rebuild... but came across a snag. A month ago I was pulling apart my masterpower turbo, to see what rebuild kit I need, and somewhere between wrenching off the wastegate actuator off the compressor housing... and a few drinks, I dumbassly knocked & dropped the turbine shaft off the cabinet on to the computer desk (which is made of tempered glass with a steel frame), then fell on the feet of the desk... after that I just put everything in a box and went to bed. Well when the rebuild kits came in, I inspected the turbine and came across a very small crack on a compressor blade, and a ******* small chip on the exhaust turbine... Do I need a replacement? Will they be fine? If the turbine is off balence, can it just be countered?![vash](https://www.miataturbo.net/images/smilies/vash.gif)
Here are some pics.
![vash](https://www.miataturbo.net/images/smilies/vash.gif)
Here are some pics.
#5
Senior Member
iTrader: (4)
Join Date: Jan 2008
Location: Falls Church, VA
Posts: 1,361
Total Cats: 17
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
When the compressor blade breaks off it is taking a ride through your motor, unless you get lucky enough to have it break off in a large enough chunk to remain trapped in your IC. I would never use a turbo with known-damaged compressor blades.
I'm not sure if that turbine wheel can be rebalanced but it's probably not something you can do yourself because it needs to be done with a fair amount of precision. Something spinning at 100,000 rpm on a 20mm radius (conservative size estimate for that wheel) is experiencing over 220,000 x g. G-Pop Shop will rebalance turbos for $65 but by the time you pay for that and a new compressor wheel you're into what a used SR20 T25 costs.
I'm not sure if that turbine wheel can be rebalanced but it's probably not something you can do yourself because it needs to be done with a fair amount of precision. Something spinning at 100,000 rpm on a 20mm radius (conservative size estimate for that wheel) is experiencing over 220,000 x g. G-Pop Shop will rebalance turbos for $65 but by the time you pay for that and a new compressor wheel you're into what a used SR20 T25 costs.
#7
Elite Member
Thread Starter
iTrader: (4)
Join Date: Dec 2009
Location: Reno, NV
Posts: 3,686
Total Cats: 95
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I payed for the turbo brand new for $500... so spending 200 for a new turbine and compressor isnt that much. I dont know much about the internals for a turbo, does the comressor and turbine in a T2 fit the T25? I heard somewhere they do, the T25 just has a bigger housing on both ends.
#9
Elite Member
Thread Starter
iTrader: (4)
Join Date: Dec 2009
Location: Reno, NV
Posts: 3,686
Total Cats: 95
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
NP here, ill just add it to my list of things to buy with military bonus+tax return... got quoted $275 from a garrett dealer for the complete shaft. Then Ill just keep the turbo as a spare or sell it along with the other healthy T2 I have to rebuild also. Thanks guys, glad I got advice before rebuild and test run...
#11
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I seriously wouldn't worry about it on the turbine side. I dropped my CHRA on concrete and took a chunk out of a tip of one of the fins on my turbo and put a little crack in the blade. Its been just fine for well over a year and many many thousands of miles, track, autox etc. I'm pretty sure the compressor is fine too but I would replace that wheel before the turbine.
Thread
Thread Starter
Forum
Replies
Last Post
StratoBlue1109
Miata parts for sale/trade
21
09-30-2018 01:09 PM