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Old 06-25-2013, 01:35 PM   #2
patternpilot

 
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Drives: 2012 2SS/RS 05 Jag S type R
Join Date: Aug 2011
Location: Tri-Cities WA.
Posts: 882
Well this is how I see it. The exhaust slows down during idle. When you speed the motor up the exhaust speeds up and the mufflers do not have time to absorb the sound, thus allowing more sound to pass by. Less muffler will allow more sound. I have Corsa exhaust and after the mods it was pretty loud all the time. I installed a Magnaflow muffler to the pipes in the tunnel. During idle it is very quiet, but during acceleration it comes alive.
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LS3, Whipple, Custom Comp Cam, springs, pushrods, timing set, CAI intake, Apex cold air scoop, Doug Thorley TRI-Y headers, Billet Custom Products baffled Valve covers, Mighty Mouse Catch can, ADM FPCM, ZL1 fuel pump, MSD boost-a-pump, Hex Vent hood vents, ProSport gauges(fuel pressure, AFR, Boost), Corsa, No Cats. Jannetty remote tuned, Pfadt trailing arms, all parts user installed. No Dyno yet. Manual trans. 3.45 gears.

Last edited by patternpilot; 06-25-2013 at 01:43 PM. Reason: wrong word
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