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03-26-2018, 10:22 PM
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#1 |
 
Drives: 2015 ZL1 AGM Join Date: Jan 2008
Location: Eastern Idaho
Posts: 85
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sound reduction
Just got back from a Pro Solo event in Fontana. Got busted for exceeding sound levels. 102.4 DB limit is 100. I was hitting the rev limiter at the end of the course and that is where the mic was. So in combo with tying the valve shut in the tailpipe, I shifted prior to coming across the finish line. I was 90 DB. My 2015 ZL1 has Kooks headers, no cats and oem mufflers. Apparently those that run into this issue often, make a "burrito" out of chicken wire and stuff it in the end of the muffler, good for 3-5 DB. I also saw a RX8 with its exhaust turned up in the air to reduce the levels I guess. Anyone have any experience with this, and what you did to solve it?
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06 GMC 3500 CC 4X4 Duramax
2015 Chevy 3500HD CC SRW 4X4 Duramax 2015 ZL1 Camaro AGM |
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03-28-2018, 09:06 AM
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#2 |
 Drives: 2013 ZL1 M6 Join Date: Sep 2016
Location: CA Bay Area
Posts: 248
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Try this from magnaflow. Jegs carries them.
magnaflow 11386 I just put it on my car because it was a little loud with headers and no cats. Got a ticket for sound so I had to tone it down. At least i still have my cutouts in so I can make it as loud as I want.
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Fast 850cc Injectors, ATI Balancer, 8.66 Lower Pulley, 2.55 Upper Pulley, Lingenfelter CAI, Kooks LT with cat delete pipes, Noweeds Exhaust Cutouts (extremely loud under full throttle), BTR Stage 3 Cam, BTR Platinum 660 Valve Spring Kit, TR7ix Iridium Spark Plugs, Lingenfelter Solid Isolator, 160 Degree Thermostat, Larger SC Coolant Reservoir with Hose Relocation Kit, BMR 1.25" Lowering Springs, MGW Short Throw Shifter, Racing Brake 2 piece rotors front and rear, Starkweather Performance Custom Dyno Tune on 91 Octane.
691.38 RWHP 630.35 RWTQ |
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03-28-2018, 03:52 PM
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#3 | |
Drives: 2013 ZL1 Join Date: Dec 2015
Location: Gulfport, MS
Posts: 250
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03-29-2018, 08:58 AM
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#4 | |
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Drives: 2013 ZL1 M6 Join Date: Sep 2016
Location: CA Bay Area
Posts: 248
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Quote:
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Fast 850cc Injectors, ATI Balancer, 8.66 Lower Pulley, 2.55 Upper Pulley, Lingenfelter CAI, Kooks LT with cat delete pipes, Noweeds Exhaust Cutouts (extremely loud under full throttle), BTR Stage 3 Cam, BTR Platinum 660 Valve Spring Kit, TR7ix Iridium Spark Plugs, Lingenfelter Solid Isolator, 160 Degree Thermostat, Larger SC Coolant Reservoir with Hose Relocation Kit, BMR 1.25" Lowering Springs, MGW Short Throw Shifter, Racing Brake 2 piece rotors front and rear, Starkweather Performance Custom Dyno Tune on 91 Octane.
691.38 RWHP 630.35 RWTQ |
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03-29-2018, 01:37 PM
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#5 | |
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Drives: 2013 ZL1 Join Date: Dec 2015
Location: Gulfport, MS
Posts: 250
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