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View Full Version : question on turbo's again



Oggie
20-09-2011, 07:35 PM
ok i have been lookign at turbos and some have these "extra" holes like the one i have attached.

what is the purpose of these many "extra" holes?

ta

Nutter_John
20-09-2011, 08:45 PM
It looks like a ported shroud ( anti surge ) - moves the area the turbo is likely to enter surge further left giving you more working area on the graph