turbo 420a exhaust smell?

[CYIMSOFAST]

I just turboed the RS im now noticing the exhaust smell is stronger than it was while non turboed. I checked for exhaust leaks but everything seems to be sealed up tight. Is this common becuse it's turboed now?

 

[Old Mitsu Tech]

I'm not a 420a man, but did you put that valve under your map sensor to keep it from seeing positive plenum pressure? Low intake pressure will equate to richer fuel mixture. Just a thought. Good Luck