Triumphrat

HooliganRandy · 07-05-2007, 12:10 PM

Hello all! I recently installed a D&D exhaust can on my stock S4. Observations: the new can is smaller, shorter, and lighter than the original. Oh, and the sound ... WOW ... I love it ... very loud/throaty indeed!!! And the womp-womp-womp at idle is now more of a WOMP-WOMP-WOMP. Don't have a performance opinion, as I really haven't tested that yet. My question is: do I have anything to worry about in terms of it running rich/lean??? Excuse my ignorance! I'm running the stock tune and the bike definately runs "different" with the new pipe. I like the way its running, just worried about harming the engine. Any advice would be greatly appreciated...

rustbucket · 07-05-2007, 12:32 PM

You won't hurt the engine. Low throttle inputs will probably be more abrupt (particularly on-off throttle transitions). To fix that, you can take spend money by getting a PowerComander/TuneBoy, or not, by bringing the bike into the dealer and asking them to load the California fuel map (#10164) and bump the CO value by a couple of points. If you go to the dealer, they'll look at you like you're crazy, but those changes work pretty well.

If you plan to get a K&N in the future, a TuneBoy is worth every penny.

HooliganRandy · 07-06-2007, 10:24 AM

Thanks rustbucket.