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930LDR 930LDR is offline
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Join Date: Dec 2004
Location: Danville - CA
Posts: 1,259
You should probably use a small dump pipe for your wastegate if your testing facility still puts the sniffer on the tail pipes. I used to have a matching wastegate dump pipe which I had to imagine skewed my test results when they stick the sniffer on it. Sure it doesn't release any exhaust normally but if they crank the car up enough to pop the wastegate you'll get a burst on un filtered exhaust running into the sniffer.

I ended up having a local muffler shop weld up a small cat and resonator (inline) to an exhuast flange in order to pass the test the last (and final time) that I needed to worry about this in Chicago. Real simple and cheap. I'll see if I can snap some pictures this weekend.
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Rob Montgomery
'88 Blk/Blk 930 ('Lucy') - Not Stock & Not Running
Old 01-24-2008, 05:49 AM
  Pelican Parts Technical Article Directory    Reply With Quote #8 (permalink)