My con reasons to using a journal vs ball bearing are as follows.
Ceramic ball bearing turbo vs journal bearing.
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.
This consists of replacing only the compressor side journal bearing with a single angular contact ball.
Journal bearing vs ball bearing.
As we know the journal bearing has long been the strength of a turbocharger and is still currently used within most turbochargers.
Back in the early turbo days turbo lag was so bad that drivers used to hit the throttle a full 1 3 seconds before it was time to accelerate as.
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In addition the opposed angular contact bearing cartridge eliminates the need for the thrust bearing commonly a weak link in the turbo bearing system.
Hmmm actually cannot.
I do believe that on a lower boost application you can strike the right balance between size and response but on a larger high hp setup with larger turbo.
Seeing the difference in how easily a journal bearing spins vs a ball bearing isnt quite fair when you are doing a bench comparison since you arent running hot oil through the journal bearing.
In addition the opposed angular contact bearing cartridge eliminates the need for the thrust bearing commonly a weak link in the turbo bearing system.
This video has been made by special request the people have spoken having said that apologies for the late release.
The 76 bb made 680rwhp 700rwtq on my 2v 4 6 at around 23lbs.
This is a teardown and rebuild of both type of turbos step by step.
Competitor ball bearing options another option one will find is a hybrid ball bearing.
If you are referring to the on3 76mm journal vs ball bearing turbos i had the ball bearing 76mm on my 99 convertible car.
1 longer cool down time for journal bearing turbo.
The old days are over.
2 slightly slower spool time than ball bearing turbo.
This consists of replacing only the compressor side journal bearing with a single angular contact ball.
Additional ball bearing options another option one will find is a hybrid ball bearing.
The journal bearing 70mm that i had originally spooled a lot quicker but that was a 68 vs a 96 a r exhaust housing which obviously makes a difference.
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.
