Judson Superchargers & Judson Rotors

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[John Moxon]

Yes the drillings are to balance the rotor. Drilling more will be counter-productive as it will unbalance the rotor.

How will you balance it again?
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John.
Judson Supercharger Information on The Samba
My 1958 Shorrock Supercharged Karmann Ghia
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Picture courtesy of Alejandro Martin:

[/quote]

Hi I'm back again to post here again got me thinking again lol ...yes got me thinking about something else but I notice the drilling done to the rotor ..my guess it was done to balance the rotor ???? But what would you guys think if the whole rotor was done like that ..I've noticed some guys are doing those golf ball intake manifolds , doing there Intake ports in the head , even some in the compression chamber.. so what do you guys think would happen if that was done to the rotor yes it will lighten the rotor another benefits you guys think ???? Maybe I'm thinking tooo much but once I got an idea it gots me thinking hmmm what if ......

[John Moxon]

Just had a message from Ricardo Deisernia aka “splitpartsunlimited” He has now found a new supplier of high quality Judson Rotors. Unfortunately the original supplier of the rotors passed away about 4 years ago but now it's business as usual. https://www.thesamba.com/vw/classifieds/detail.php?id=1243484
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John.
Judson Supercharger Information on The Samba
My 1958 Shorrock Supercharged Karmann Ghia
Stop dead photo links! Post your photos to The Samba Gallery!

[steven wardlaw]

Just wanted to share some info on the replacement rotors. The rotor in my Judson was worn so bad when that it sounded like it had marbles inside. The old rotors were not made from a material that was very wear resistant. The aluminum was a cast material that was very porous. The replacement I bought for mine was made from 7071 aluminum and then hard anodize coated. I have machine parts over the years that were coated with hard anodize and I can tell you that with this coating you may never have to replace the part again. I have over 6500 miles on mine since the rebuild and during a tune up this past October I thought I would pull the Judosn down to see how it was doing and it didn't have any noticeable wear. My Judson is still cranking out 6 pounds of boost.

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I know it's been sometime someone posted here...but it got me wondering...OK here's what's on my mind and let's debate or help each other understand more ...OK I notice how the judson rotors wear out and can cause alot of noise..but what if we were to change the rotor to steel or a cast iron I know what why it would be heavy..but I see it like this since the fiber blades are sliding up and down on the aluminum a steel version would last longer ...it would be like using aluminum pulley vs a steel or cast iron pulley cast iron pulley will out last aluminum pulley by alot ... so wouldnt that be the same Logic with the aluminum rotor of the judson ...with a steel rotor version would need be drilled to lighten it up .... or cast iron version....

[henry roberts]

thanks john. that is a lot more than i was expecting.

edit. it is a smidge less than i was expecting.

[John Moxon]

[avus]

.5mm seems like a lot--maybe .05mm??

[John Moxon]

[henry roberts]

just re-asking the question on what the clearance of the blade to blade slot on a new rotor/blade combo is?

thanks.

[DMNCLNR]

[billmetric]

Awesome, I sold a worn out housing by itself a few years ago for $100 , wish i had kept it, I have had about 5 Judsons and I have to say they were all pretty far gone, finally the spool is available, I had one unit that had huge waves in the cast iron part also, I suppose there was enough left to bore it out but I got rid of that one cheap as well, I just broke another oiler bottle a few weeks ago, I have broken 3 of those darn antique pickle bottles, will have to be more careful with them after seeing the new price! , was there ever a smaller bottle or was that the only size available?
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There is an idea of a Billmetric; some kind of abstraction. But there is no real me: only an entity, something illusory. And though I can hide my cold gaze, and you can shake my hand and feel flesh gripping yours and maybe you can even sense our lifestyles are probably comparable... I simply am not there...

[splitjunkie]

[DMNCLNR]

[John Moxon]

[DMNCLNR]

I feel like i just sat through an infomercial. On a serious note, I will be rebuilding my judson soon, and will buy the new rotor wether it needs it or not, just to be safe. Although they appear to be a bit pricey, I think in the end they will be worth it. I have bought from libreriajenny before, and he is an excellent seller. Hopefully a pricebreak will come soon
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To his their own PBJ
Pl@y@ #1

[Dave]

I was lucky; the Judson I rebuilt for Hot VWs Magazine had virtually no wear on the rotor, but still, when I re-assembled it, you could hear a slight "clacking" from inside the blower when it was spinning. I've heard worse, much worse, and as soon as you revved the engine the sound pretty much went away.
I think one of the main things is getting the "end float" or end play, between the rotor and the front and back plates right. As well, when pressing in new bearings, realise that those plates are old, and they are aluminum. Take your time, go slow, and get them in straight.
If you have all the right parts, hey aren't hard to rebuild. They are actually quite a simple affair, and WILL provide extra power, with no decrease in reliability, IMHO.
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2003 Samba Chummie Winner- Best Story

"Those that matter, don't mind,
and those that mind, don't matter"

[John Moxon]

[Snort]