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Discussion Starter #1
Paxton Novi 1220SL Noise (video)

Video Link: https://vimeo.com/319247918

After 5 years and about 10k miles (weekend cruiser) I have noticed that my blower has developed a "whine" to it that to me is very similar to what a bad power steering pump sounds like when you turn the steering wheel. The unit has had 2 fluid changes since new and the level isn't down. I removed the intake tubing and the drive belt and there is no play in the shaft and when I spin the blower by hand I hear no grinding and it doesn't require any more effort than it used to. I have been spinning it to the max by running an 8" crank with a 3.15 blower pulley, at 6k rpms this equals 54857 rpms on the impeller. However, this rpm is rare and even with aggressive driving I am shifting at around 5500-5800. I believe max rpm recommendation is 52k from manufacturer.

Anyone with experience on the self lubricated V3 Vortech or the Paxton Novi 1220 come across anything like this and was a rebuild in order or does the blower increase in noise as the miles wear the units?
 

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how does the impeller look?

spinning it by hand is not going to replicate the side load as with the belt on

i dont now how they should sound, but all the belt driven hair driers i have heard, whine a lot
 

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Impeller looked fine and no sign on casing that any contact has/is occurring.

I will run it and monitor for any changes with the noise.

Any worse and I'll have to send it off for rebuild.
 

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From my Vortech days I was told by a very good source that you could over spin a Vortech by 10,000 rpms before you had to worry. After that you had to be checking that the impeller didn't hit the volute. Also had to be run a large BOV. I over spun my V2 by 10,000rpm and never had a problem.
 
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