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Anyone know any testing results on the ceramic dual ball bearing upgrade on the large frame units?
PT
 

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The shaft floats on oil.....waste of money
I'd hardly say that it's a waste of money. There are plenty of advantages of ceramic bearings:

#1 Bearings are lighter - the lighter balls in the bearings allow them to rev up faster and use less energy to maintain its speed

#2 Bearings are harder - The ceramic ball is harder than steel. That gives you a bearing that will last longer since it will hold its' surface finish better

#3 Bearings are Smoother - Ceramic has smoother surface properties than steel, thus give you a smoother running bearing

#4 Thermal Properties are better than steel - Ceramic does not heat up like steel - Helps avoid heat build up in the bearing

#5 Ceramics require less lubrication that a standard bearing.
 

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Here's some information from Garrett:

The journal bearing has long been the brawn of the turbocharger, however a ball-bearing cartridge is now an affordable technology advancement that provides significant performance improvements to the turbocharger.
Ball bearing innovation began as a result of work with the Garrett Motorsports group for several racing series where it received the term the ‘cartridge ball bearing’. The cartridge is a single sleeve system that contains a set of angular contact ball bearings on either end, whereas the traditional bearing system contains a set of journal bearings and a thrust bearing
Journal Bearings
Ball Bearings
Turbo Response – When driving a vehicle with the cartridge ball bearing turbocharger, you will find exceptionally crisp and strong throttle response. Garrett Ball Bearing turbochargers spool up 15% faster than traditional journal bearings. This produces an improved response that can be converted to quicker 0-60 mph speed. In fact, some professional drivers of Garrett ball-bearing turbocharged engines report that they feel like they are driving a big, normally aspirated engine.
Tests run on CART turbos have shown that ball-bearings have up to half of the power consumption of traditional bearings. The result is faster time to boost which translates into better drivability and acceleration.
On-engine performance is also better in the steady-state for the Garrett Cartridge Ball Bearing

Reduced Oil Flow – The ball bearing design reduces the required amount of oil required to provide adequate lubrication. This lower oil volume reduces the chance for seal leakage. Also, the ball bearing is more tolerant of marginal lube conditions, and diminishes the possibility of turbocharger failure on engine shut down.
Improved Rotordynamics and Durability – The ball bearing cartridge gives better damping and control over shaft motion, allowing enhanced reliability for both everyday and extreme driving conditions. In addition, the opposed angular contact bearing cartridge eliminates the need for the thrust bearing commonly a weak link in the turbo bearing system.
Competitor Ball Bearing Options – Another option one will find is a hybrid ball bearing. This consists of replacing only the compressor side journal bearing with a single angular contact ball bearing. Since the single bearing can only take thrust in one direction, a thrust bearing is still necessary and drag in the turbine side journal bearing is unchanged. With the Garrett ball bearing cartridge the rotor-group is entirely supported by the ball bearings, maximizing efficiency, performance, and durability.
Ball Bearings in Original Equipment – Pumping up the MAZDASPEED Protegé’s heart rate is a Garrett T25 turbocharger system. With Garrett technology on board, the vehicle gains increased acceleration without sacrificing overall efficiency and it has received many rave reviews from the world’s top automotive press for it’s unprecedented performance.
 

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I'd hardly say that it's a waste of money. There are plenty of advantages of ceramic bearings:

#1 Bearings are lighter - the lighter balls in the bearings allow them to rev up faster and use less energy to maintain its speed

#2 Bearings are harder - The ceramic ball is harder than steel. That gives you a bearing that will last longer since it will hold its' surface finish better

#3 Bearings are Smoother - Ceramic has smoother surface properties than steel, thus give you a smoother running bearing

#4 Thermal Properties are better than steel - Ceramic does not heat up like steel - Helps avoid heat build up in the bearing

#5 Ceramics require less lubrication that a standard bearing.


lol, okay in a drag race application its a waste of money....
 

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If it will spool a tighter converter it's not a waste of money.
 

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I can say the compressor wheel spins for what seems like a minute after shutdown but aside from that...we build them to spool so generally spend the coin elsehwere unless it's a "best of everything" type of customer.
 
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