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11-04-2010, 11:23 AM
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#1 |
 
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L99 with Borla S-Type Catback
I recently bought the Borla S-Type catback system and all I can say is wow. It sounds amazing but doesnt drone all that much, just sometimes in third gear or so. But I have a question.
About two days after I got it installed, I began to notice a weird sound. When I'm cruising without any real throttle the system is quiet, but as soon as I give it a little gas, it sounds like almost like a bubble is coming out of the back of the car. The note of the exhaust changes suddenly, not in a bad way but noticibly. It goes from a quieter noise to the regular aggressive noise it should sound like. Is this the engine switching from 4 to 8 cylinders or something else? I'm confused. -Skeetss |
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11-04-2010, 11:25 AM
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#2 |
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How U Doin?
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It is your AFM (active fuel management) kicking in and out. I have the same exhaust on my L99 and I love it but the AFM got on my nerves. I ended up getting rid of the AFM with my custom tune.
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11-04-2010, 11:28 AM
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#3 |
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Camaro Lover
Drives: 2014 GMC Sierra 5.3L Join Date: Feb 2010
Location: Chicago 'Burbs
Posts: 709
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Yea its the AFM. no real easy way to get rid of it unless you get a custom tune. or use a handheld tune.
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No Camaro right now. But I'll be back in one in a few years.
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11-04-2010, 11:35 AM
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#4 |
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Yeah thats what I figured. Pretty annoying! I'm planning on getting a tune with my LTs anyway so I'll wait it out. Thanks a lot guys.
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11-04-2010, 11:38 AM
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#5 |
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How U Doin?
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No problem.
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11-04-2010, 11:41 AM
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#6 |
 
Drives: 2011 2SS/RS SIM L-99 Join Date: Jun 2010
Location: Dunbar WV
Posts: 385
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Would this bs as pronounced with just te axleback?
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3rd Time is the charm
2012 2SS/RS VR 6M. Borla S type, Volant CAI. |
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11-04-2010, 11:52 AM
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#7 |
 
Drives: 2010 camaro ss LS3 cyber grey Join Date: Aug 2010
Location: Madison,wi
Posts: 226
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Would you rather have kooks full exhaust or obx headers and factory exhaust?
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11-04-2010, 01:45 PM
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#8 |
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Drives: 2011 2SS/RS SIM L-99 Join Date: Jun 2010
Location: Dunbar WV
Posts: 385
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Answered my own question...sounds amazing as an axle back. I'm sure the cat back adds some actual hp though.
__________________
3rd Time is the charm
2012 2SS/RS VR 6M. Borla S type, Volant CAI. |
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11-04-2010, 02:09 PM
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#9 |
                  
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definitely get the tune, mine was tuned at Jannetty Racing and it is awesome.
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Jannetty Racing JRE Street Package
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11-04-2010, 10:38 PM
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#10 |
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Drives: 2010 SS L99 Join Date: Apr 2010
Location: Richmond, Va.
Posts: 15
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I have the L99 with the borla atak catback and solo high cats and it does sound awesome but the AFM does drives me crazy.
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11-05-2010, 05:23 AM
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#11 |
Drives: RED@2SS Join Date: Aug 2010
Location: UAE
Posts: 1,372
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u must tune it directly , u'll feel the change and the sound will gone ..
there is no AFM option in LS3 ..
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