turbo binding up

[Greg5OH]

Putting my hx35 back together, and as soon as you get the smallest bit of torque on the nut, the impellers bind up and you cannot spin the shaft. I checked everything is seated corrected..i dont see a problem, any ideas?

 

[Agnem]

Let me rebuild it for you. What you have described is the beginning of you ending up with a turbo, that when it fails even I won't be able to rebuild it for you.

 

[Greg5OH]

I do my own work, thanks though.
Figure out i put the upper thrust collar on backwards

 

[icanfixall]

I do my own work, thanks though.
Figure out i put the upper thrust collar on backwards

Most here will do their own work till it comes to turbo rebuilding. Many have really messed them up. some beyond repairs too. Please have a shop balance the spinning part of the turbo. the shaft is turning as much as 120,000 rpm at speed. Thats 2000 rpm per second. It takes less than a gram out of balance to ruin all your work.

 

[Greg5OH]

Yes i had the rotating assembly balanced and cheked for runout by midwest turbo

 

[icanfixall]

Great thing to do really. Many here have no idea these tiny turbo spools spin 2000 rpm per second. Most probably have never given it a second thought. Anything spinning that fast MUST be balanced to lots less than a gram. Glad you are doing it right and not attempting something "different"... Over in the lounge in the pictures of something unusual is a turbo that had some metal poorly welded to the inlet blades. The owner was trying to increase boost but all was done was cut down the boost. That turbo could not have spun up to full rpm without ripping apart everything. Besides ruining a turbo he had no idea what he was doing. Those are the dangerous types. The "hold my beer kind"...

 

[Iowa 73]

2000 rpm per second

2000 rps
rpm = revolutions per minute

 

[snicklas]

No, he is correct, 2000 Revolutions per Second. They spin very fast. The blades spinning that fast, cutting the air, is what causes the whistle.

 

[79jasper]

Garret/Honeywell has some info on some that are up to 280,000 rpm. That's about 4,700 rps.
Getting off topic here, but it's pretty interesting.
And for some turbos, garret actually has rpm gauges.
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[icanfixall]

Technically I should have written it as"these turbo shafts will spin 120,00 rpm. Thats 2000 revs per second".

 

[chris142]

that speed is amazing! whats more amazing is that an.oil that looks like its loaded with junk,black as night can protect the bearings in that turbo for many thousands of miles.

 

[mohavewolfpup]

Garret/Honeywell has some info on some that are up to 280,000 rpm. That's about 4,700 rps.
Getting off topic here, but it's pretty interesting.
And for some turbos, garret actually has rpm gauges.
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How do I get one of those gauges for my hypermax?

 

[79jasper]

I'm sure it could be done. Would take some machining.
Other companies make them also.
Easiest way: getting a turbo already setup for it. ;Peelout

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[mohavewolfpup]

I'm sure it could be done. Would take some machining.
Other companies make them also.
Easiest way: getting a turbo already setup for it. ;Peelout

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sounds expensive and like it will be a ton of boost!

 

[79jasper]

Haha just search around, might find something interesting.
And something Chris mentioned that I wanted to touch on; the turbos these truck use, the "bearing" is just a cushion of oil.
Some other types use a ball bearing setup.
To say ball bearing turbos are an advancement, is an understatement.

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