04-04-2013, 04:40 PM | #1 |
Drives: 2013 Camaro 1LE 2SS,RS,NPP Join Date: Feb 2013
Location: Mt Washington, KY
Posts: 69
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NPP Exhaust Issue
I just got home with my 1LE and noticed that the exhaust valve on the NPP is staying open all the time. Is this normal? I thought it would shut after start up and then be shut until over 3,000 RPM.
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04-04-2013, 04:50 PM | #2 |
Bayou City Muscle Cars
Drives: 2013 2SS Dusk Edition Join Date: Jan 2013
Location: Houston Texas
Posts: 1,443
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at idle/startup and below 2k it is open.
at 3k or higher it is also open. so only if you hold the rpms in that middle range will it be closed
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2013 2SS Dusk Edition
Lethal Racing Stage V PER 418ci Forged LS3 530/520 SAE |
04-04-2013, 04:53 PM | #3 |
Bayou City Muscle Cars
Drives: 2013 2SS Dusk Edition Join Date: Jan 2013
Location: Houston Texas
Posts: 1,443
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PS just yank the fuse and be done with it till you get heavily modded
sounds great going through the loud side. only after I cammed and did my exhaust did I bother putting a mild to wild in to keep the cam at bay while chugging around.
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2013 2SS Dusk Edition
Lethal Racing Stage V PER 418ci Forged LS3 530/520 SAE |
04-04-2013, 05:06 PM | #4 |
Drives: 2013 Camaro 1LE 2SS,RS,NPP Join Date: Feb 2013
Location: Mt Washington, KY
Posts: 69
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Great! Thanks, I thought I had an issue already!
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07-08-2014, 04:20 PM | #5 |
Drives: 2019 Camaro SS Join Date: Jul 2014
Location: ca
Posts: 1
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is there a way to keep the chamber open in the exhaust it sounds a lot better!!!!!!
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07-08-2014, 11:34 PM | #6 |
Drives: 2022 CT4-V Blackwing Join Date: Sep 2013
Location: Florida
Posts: 2,723
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07-09-2014, 04:09 AM | #7 |
Drives: '14 2SS/RS Vert 6M/KTU/NPP/DTA/ARH Join Date: Jan 2014
Location: Indianapolis
Posts: 2,826
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Not a 1LE but this is how mine is programmed. You can hear it close about 10 sec after cold start and hear it open at 3000.
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07-09-2014, 06:51 AM | #8 | |
Drives: E92 BMW M3 Join Date: Oct 2012
Location: Houston
Posts: 4,496
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Quote:
That's odd, it should stay open until you reach 2000rpms unless under heavy throttle.
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SOLD - 2013 1LE - Pat G Spec'd Cam, NPP with 1 7/8" Long Tube Headers with High Flow Cats, Intake w/scoop, Ported Throttle Body, and Apex 1.25" Lowering Springs.
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07-09-2014, 08:20 AM | #9 |
Drives: '14 2SS/RS Vert 6M/KTU/NPP/DTA/ARH Join Date: Jan 2014
Location: Indianapolis
Posts: 2,826
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Closes backing down the driveway (which is a good thing).
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Consensus is, by definition, a lack of leadership.
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07-09-2014, 09:51 AM | #10 |
Drives: 2014 Camaro SS/RS 1LE 1967 Camaro Join Date: Oct 2013
Location: Fort Wayne, IN
Posts: 873
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