Road racing with journal bearing turbos

I am Jacks N54

Specialist
Sep 10, 2018
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Ventura, CA
Ride
e90 335i
I found this blurb over on Evasive's site when looking at journal bearing turbo maps:

Many have reported terrible longevity with turbochargers that are not water cooled when it comes to road racing, but it seems that the limited full throttle pulls an owner can achieve on the street or at the drag strip don't cause any problems for non-water cooled turbochargers.


I hadn't heard this before. Has anyone experienced this first-hand?

This makes more sense in an endurance environment, but I'm wondering if it would apply in 30 min hpde sessions.
 
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