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Old 09-03-2023, 08:30 AM   #1047
wbradley
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Join Date: May 2012
Drives: '13 FR-S M6, '23 Volvo V60 CC
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Garage
Quote:
Originally Posted by zachseidy39 View Post
Hi guys I recently bought a used GT2-7040L kit and of course when I got it I wanted to see how it worked and spun it by hand back and forth a few times. I then was doing some reading and it appears that some older models came with a disclaimer not to spin it in reverse. Do you think I did any damage or can I stop being paranoid? Thanks
I have a V2 dyno tuned and with the intake restrictor removed. I think this will be the 8th year and at least 50K km on it trouble free. Stop being paranoid. The oil wouldn't pump internally if spun in reverse at high speed, which would destroy the unit. Also, there's a small spring-actuated mechanism that disengages the internal rollers to some extent at lower to idle speeds. Almost like a centrifugal clutch. This is unique to the HKS system compared to a regular Rotrex based design. It's probably ok, but don't mess with it just to be safe.
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