my love for ball bearings!!!!

[Hypsi87]

OH MAN!!!!!!

I have recently upgraded from a standard sleve bearing TE-63 to a dual ball bearing TE-66.. and I have just put it on the car last night.


JESEUS CHRIST!!!!!!!!

when I first bought this turbocharger people told me that I wasted my money. I say they don't know what the hell they are talking about. Boost comes in sooo damn fast that at 65 MPH and I flatfoot it. my car just goes insane and blows the tires loose and kicks sideways. There is no difference between how fast a supercharger builds boost and how fast this dualball bearing turbocharger does. It's great 11 in of vac. to 26 PSI in less than a second.

[Zgringo]

Mr. Hypsi87, Whoever said you were waisting your money and didn't know what you were talking about are just plain retarded. It's a fact that roller bearings are much better than solid (sleve) bearings. You don't have to be a rocket scientest to figure that out.
Sounds like you got it working.

[SaabJohan]

Originally Posted by Zgringo

Mr. Hypsi87, Whoever said you were waisting your money and didn't know what you were talking about are just plain retarded. It's a fact that roller bearings are much better than solid (sleve) bearings. You don't have to be a rocket scientest to figure that out.
Sounds like you got it working.

Actually, that depends on how you define better and how you're going to use them.

Hydrodynamic bearings does for example offer lower costs and a longer life. So if you're using them in a turbocharger for a diesel truck the hydrodymnamic bearings will likely be the better ones.

The advantage with the ball bearings is their low friction loss.

[Zgringo]

Originally Posted by SaabJohan

Actually, that depends on how you define better and how you're going to use them.

Hydrodynamic bearings does for example offer lower costs and a longer life. So if you're using them in a turbocharger for a diesel truck the hydrodymnamic bearings will likely be the better ones.

The advantage with the ball bearings is their low friction loss.

Lets see....how would you define better? You think less friction, less wear and longer life would be considered better? How about less heat transfer and quicked spool times, does that fall into the better range?
Where was anything said about turbocharging a diesel truck?

[nissanfanatic]

lol

[SaabJohan]

Originally Posted by Zgringo

Lets see....how would you define better? You think less friction, less wear and longer life would be considered better? How about less heat transfer and quicked spool times, does that fall into the better range?
Where was anything said about turbocharging a diesel truck?

Ball bearings in a turbocharger offer lower friction but at a higher cost and shorter life. Lower friction results in a faster spool up and a lower boost threshold. Performance is especially improved at low engine speeds.

Heat transfer isn't an issue in either case. But temperature resistance is. In the case of the ball bearing turbocharger (two angular contact bearings) the outer race will see about 160 degC with engine at full load at high engine speed (900 degC turbine inlet temperature) and the inner race around 260 degC. This means that the bearing materials must be chosen carfully. In the case of the hydrodynamic bearings it it recommended that on at least racing turbochargers to use lead free bronze as the temperature can exceed the melting point of lead which is around 327 degC (1100 degC turbine inlet temperature).
These temperatures does however illustrate how well the exhaust gas is isolated from the bearing and compressor housing, considering the temperature drop of around 700 degC.

NOTE: The friction in the hydrodynamic bearings are caused by the shear of the oil film. There is normally no metal-metal contact and no wear.

[Zgringo]

You seem to amaze me. You state how great ball bearings are then turn around and say hydrodynamic bearings are better. Then you go on to say, "There is normally no metal-metal contact". Now correct me if I'm wrong, but any metal contact is bad.
Don't dig the hole too deep.

[Hit_N_Run-player]

ive got to agree that there is little wear on sleeve bearings that are new, verse super old shitty ones. I just pulled some sleeves out of a turbo from a diesal, compare it too brand new one and there really is barely a difference...

[SaabJohan]

Originally Posted by Zgringo

You seem to amaze me. You state how great ball bearings are then turn around and say hydrodynamic bearings are better. Then you go on to say, "There is normally no metal-metal contact". Now correct me if I'm wrong, but any metal contact is bad.
Don't dig the hole too deep.

It's all about how you define better!

If one want cheap durable bearings hydrodynamic bearings is the way to go. On the other hand, if cost is no object, minimum turbocharger response is important and the shorter life doesn't matter then ball bearings is best.

Metal-metal contact can always happend when for example the engine is started up and there isn't oil pressure after one or a few seconds. Under normal conditions it shouldn't happend.