Drilling/Porting through the supercharger rotors, from another forum

grey500se

Registered User
I know a lot of guys use stiegemeier racing here but I found this interesting, sure hope they can drill these straight and still get it to seal, either way, interesting.


http://www.stiegemeier.com/lwr.html


rotors_sc_drilled.jpg
 
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I see the M112 and the M62 listed on the site there, but nothing for the M90, unless I didn't dig far enough.

Seems like a good idea though. Anytime you can reduce the rotating mass of an item it has benefits. I would wonder how this affects the balancing though. I suppose they are removing the same amount from each lobe, but it would have to be precise as to where the drilling started to keep it balanced across all 3 lobes as it rotates.
 
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