01-08-2011, 01:06 PM | #1 |
Drives: 2011 Victory Red Auto 2SS Join Date: Aug 2010
Location: West Tn
Posts: 628
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Black exhaust pipes
I am running a unmodified SS. Have about 4100 miles on it and both exhaust pipes are black. Is that normal?
Always thought they should be a gray if mixture is set correctly. Mileage is a little lower than I expected. |
01-08-2011, 01:45 PM | #2 |
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The tune from the factory is a little rich for safety reasons, hence the carbon on the tips.
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01-08-2011, 04:09 PM | #3 |
The Hof
Drives: 2010 IOM Camaro 2SS/RS Join Date: Jan 2010
Location: Jamestown, RI
Posts: 825
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Pig rich IMHO
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01-09-2011, 05:15 PM | #4 | |
Drives: 2011 Victory Red Auto 2SS Join Date: Aug 2010
Location: West Tn
Posts: 628
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Quote:
It would seem to me that running rich would carbon up the heads and cause problems and also hurt gas mileage. |
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01-10-2011, 08:42 AM | #5 |
Drives: GM anything Join Date: Sep 2009
Location: Tuning GM in Richmond VA
Posts: 147
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It's only at WOT. The car does NOT run rich just driving around.
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01-10-2011, 08:54 AM | #6 |
Drives: 2010 Camaro SS LS3 Join Date: Sep 2010
Location: Eastern MO
Posts: 3,786
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Right, because in closed loop the O2 sensors keep things in check. But like the OP, I wonder why the tips are so black?
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01-10-2011, 02:05 PM | #7 |
Drives: 2011 Victory Red Auto 2SS Join Date: Aug 2010
Location: West Tn
Posts: 628
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01-10-2011, 03:33 PM | #8 |
It's black envy. The pipes want to match the body IMO
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01-10-2011, 06:55 PM | #9 | |
Drives: BLUE CAMARO ZL1 1LE M6 Join Date: Jun 2009
Location: ON THE DYNO WATERBURY CT.
Posts: 15,218
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Quote:
Back in the day when we had good fuel the pipes would be gray. Or switch to race fuel and they turn gray. Ted.
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01-11-2011, 01:03 PM | #10 |
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Although the tailpipes on my SS are still dark thanks to "environment friendly fuel", the amount of soot has been reduced at least 75% since I installed a catch can.
Ed M.
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01-12-2011, 04:48 PM | #11 |
Drives: 2011 Victory Red Auto 2SS Join Date: Aug 2010
Location: West Tn
Posts: 628
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I was under the impression that the 10% mix were cleaner burning. If it leaves a black residue, don't see how that could be true. Must be one of Al's miss understandings.
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