Quote:
Originally Posted by mrg666
That unit is sealed and not serviceable for a reason. Engineering tolerances get pretty tight to function reliably at 100K rpm. You have no idea about those tolerances and material specs. And, yes, I am an engineer and wise enough not to share credentials on public forums.
Thank you again for the teardown; that was interesting. But I don't take your design criticism too seriously. If you want to risk more of your "hard-earned" money by installing that unit again Sure that is my opinion and it is your car. Good luck.
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Fair enough, you have a stronger educational background (engineering) in this stuff than I do. Saying I have no idea about the tolerances and material specs however is incorrect and is very naive. Rockwell hardness measurements and micrometers were used to check the specs before reassembly. I also checked the alloy that Rotrex used with instrumentation I have access to just for my information.
Quote:
Originally Posted by CSG Mike
How high the engine revs has nothing to do with high how the Rotrex is revved. The pulleys used determine the ratio, and a rotrex geared to rev to 90,000 (for example), will rev to 90,000 at redline, whether the driving engine is doign 6000, 8000, or 10,000 rpm.
In other words, the engine's RPM + gearing determines rotrex RPM, not just the engine RPM.
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I realized that I wasn't thinking right when I wrote that on my drive home today. What I meant to say is that those engines change RPMs very rapidly especially when people dump their clutches to launch into VTEC. The rapid change in RPM is rumored to be snapping the brittle hardened sun shafts. We know that hardened steel = brittle. Just a theory though and not a proven fact.
Either way, what's done is done and I am confident enough to run this blower. I will run some nylon filters on the hot side pipes before the intercooler for some added protection. Best of luck to me!
No more arguing on my end - what's done is done. I wrote this thread to help people understand what is potentially happening inside their blowers.