I would have thought the boost generated be quite negligible at idle (if you're on about a vnt). A supercharger on the other hand would probably register a few psi. Don't think it would cause you any problems. Adjust preload /fit stronger spring and it should be fine.
Also, whistle on idle does not = boost!!
Also, whistle on idle does not = boost!!
![[Image: brokendown-1-1-1.jpg]](http://i1054.photobucket.com/albums/s491/n0v0s/brokendown-1-1-1.jpg)
Dturbo GT2259s build thread;
http://306oc.co.uk/forum/thread-3692.html
Daily driver; 330d Msport (doesn't blow up!)