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Thread: Ball bearing vs Journal bearing turbos

              
  1. #1
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    Ball bearing vs Journal bearing turbos

    Hey guys, it looks like we're just about to get several new aftermarket turbo options for the N54 and i saw this writeup on Garrett's site and i thought it would be a nice bit of info to share. I know for a lot of guys on here this is nothing new but for a few people it will be a good bit of info on exactly what a ball bearing turbo is and what it does. All credit goes to Garrett and the original can be found here: http://www.turbobygarrett.com/turbob..._ball_bearings



    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

    Ball Bearing

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    Journal Bearing
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    Chart showing response times
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    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.
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    Moving this to Advanced Tech, great stuff.

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    This is an excellent post +1 for you
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    Excellent article! I have always had great results with Turbonetics ceramic ball bearing turbo's on my setups and with the much more aerodynamic fin design, lighter weight and smaller snout that will allow for a longer fin, the newer billet aluminum wheels are a great plus!

    Here's a picture of a set of custom BTX6162XJ twins with ceramic ball bearing and billet wheels on a old school 911. My good friend Bisi over at Bisimoto Engineering mentions the turbo response is incredible!

    Click here to enlarge

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    Click here to enlarge Originally Posted by Driver Click here to enlarge
    This quote is hidden because you are ignoring this member. Show Quote
    Here's a picture of a set of custom BTX6162XJ twins with ceramic ball bearing and billet wheels on a old school 911. My good friend Bisi over at Bisimoto Engineering mentions the turbo response is incredible!
    Need more pics of that setup in a separate thread.

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    This quote is hidden because you are ignoring this member. Show Quote
    Need more pics of that setup in a separate thread.
    Sure thing. I just posted on this link: http://www.germanboost.com/showthread.php?32956-Incredible-Porsche-911-twin-turbo!

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    Click here to enlarge Originally Posted by Driver Click here to enlarge
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    Nicely done.

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    Click here to enlarge Originally Posted by Driver Click here to enlarge
    This quote is hidden because you are ignoring this member. Show Quote
    Excellent article! I have always had great results with Turbonetics ceramic ball bearing turbo's on my setups and with the much more aerodynamic fin design, lighter weight and smaller snout that will allow for a longer fin, the newer billet aluminum wheels are a great plus!

    Here's a picture of a set of custom BTX6162XJ twins with ceramic ball bearing and billet wheels on a old school 911. My good friend Bisi over at Bisimoto Engineering mentions the turbo response is incredible!
    The guys over at Bisimoto are BADASS. The 700hp D series wagon they built is amazing lol
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    MOTIV750, MOTIV P-1000 PI, MOTIV/FUEL-IT! low pressure fuel system, AEM EMS/COBB AP, Aquamist HFS-3, ETS FMIC, SPEC stage 3+ clutch/SS flywheel, BC Racing coilovers and VMR wheels wrapped in Hankook RS3s.

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    very nice, that transient response curve is the bees knees. Real data ftw
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