Join Date: Jan 2003
Location: Crown Point, IN, USA
Posts: 278
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Re: (btrim23)
Just remember that there are 3 different ball bearing systems on the market, each with its own advantages and disadvantages. The Garrett uses a single sleeve system with a set of two angular contact ball bearings on either end with no journal bearing. Here are the advantages:
1) Reduced amount of oil flow for adequate lubrication. Lower oil volume reduces the chance for seal leakage and is more tolerant of marginal lube conditions.
2) Better damping and control over shaft motion for better reliability under extreme conditions (e.g. street racing). This system also eliminates the need for a thrust bearing, which is a common weak link in journal bearing turbos.
3) Decrease in lag time by about 15% over journal bearing turbos. This gives you better acceleration, particularly in the 0 to 60 mph range.
4) The Garrett system is also quicker spooling that some competitor's single ball bearing system. Since a single bearing system can only take thrust in one direction, a thrust bearing is still necessary in competitor's systems. The drag on the turbine side journal bearing is still there.
Finally . . .
*These systems are water-cooled, but we can also build a water cooled journal bearing if someone so desires.
*We do rebuild the Garrett ball bearing turbos that we sell.
*Journal bearing turbos will last . . . if you take care of them. Mine is 19 years old, but I am switching over to a ball bearing myself.
Rod Short
Sales Manager
Precision Turbo
Call rod short... If he even exists... He is on the internet cant believe anything on the internet.