I was refferring to turbos because on a SA detailing forum I posted a tip about simply giving a car a short blip of the throttle to remove old dirt etc in the exhaust when detailing a vehicle....
(Obviosuly you do this after you have scrubbed the exhaust pipe, poured engine cleaner in it etc to reove excess water and to dry it).
I made mentionn that a detailer should not do this with a turbo'ed car cos it would damage the turbo....and I sorta got confused and mssed your explanation up and wanted to check that I was speaking the truth which turns out my story was slightly warped. So I posted the link to that thread there so that people could make sense of what I was saying
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Thanks everyone.
Mike