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Highest HP out of a supercharger set-up

Originally Posted by MoulaZ For that kind of RPM, yeah they can replace the bearings with some hybrid ceramics, but how about the impeller wheel, shouldn't that also need to

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Old 06-02-2017, 10:07 PM   #1 (permalink)
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For that kind of RPM, yeah they can replace the bearings with some hybrid ceramics, but how about the impeller wheel, shouldn't that also need to be machined for much better balance? The limit imposed on these units takes into account both of those aspects.

I'm running the '9 psi' pulley and at 7500 engine RPM the impeller is spinning at just a hair over 56000. Do you know the diameter of your input pulley?
Their impeller is balanced to within .006g/inch at 60,000 RPM. So it will obviously be spinning faster but I don't think it will be enough to cause concern. Im going to start with a new combination and go from there. The 9 psi pulley, 2.85" supercharger pulley, and 3.47" jackshaft pulley. We might be bumping my redline up a little as well.
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Old 06-03-2017, 03:03 AM   #2 (permalink)
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Their impeller is balanced to within .006g/inch at 60,000 RPM. So it will obviously be spinning faster but I don't think it will be enough to cause concern. Im going to start with a new combination and go from there. The 9 psi pulley, 2.85" supercharger pulley, and 3.47" jackshaft pulley. We might be bumping my redline up a little as well.
What is the diameter of the 9 psi (or lb pulley as it is otherwise referred to) pulley?
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Old 06-03-2017, 07:57 AM   #3 (permalink)
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What is the diameter of the 9 psi (or lb pulley as it is otherwise referred to) pulley?
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Old 06-03-2017, 09:10 PM   #4 (permalink)
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Thank you for that.
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Old 06-03-2017, 10:41 AM   #5 (permalink)
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What is the diameter of the 9 psi (or lb pulley as it is otherwise referred to) pulley?
It seems that there have been 2 different sizes going around. Mine is the 2.75" I believe you measure down inside the grooves where the belt lays.
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Old 06-03-2017, 09:11 PM   #6 (permalink)
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It seems that there have been 2 different sizes going around. Mine is the 2.75" I believe you measure down inside the grooves where the belt lays.
Thank you for that.
Last edited by Optimiser; 06-03-2017 at 09:56 PM. Reason: spelling
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