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02-21-2019, 11:46 AM
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#15 |
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SoCal Camaro5 Race Team
Drives: 2021 Shadow Grey Camaro 2SS 1LE Join Date: Mar 2010
Location: SO CAL
Posts: 14,288
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A guy tested the npp at full open at idle and 4000 rpm with a decibel reader as the ref station would. Read the max 95 dB. But that was in the garage where I suspect a echo could cause a louder reading. The chp uses 95 dB at 50 ft. I have what is in my sig. the 3” catback booms at low rpm, removed hiflow cats and put stock ones back in to be legal, and a little more quiet. Sounds good still and more liveable. Only lost 11 hp. To compare, with the hiflows on, at scca autocross events there is a 95 dB max and My car never hit that. They gave a meter set to make sure.
Now a cop hearing your car can be another thing. I felt best not to be noticed at all so not to get pulled over |
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02-21-2019, 11:55 AM
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#16 |
 Drives: 2015 2SS 1LE Join Date: Dec 2016
Location: Indianapolis
Posts: 116
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505/465: 416 stroker, landspeed stg 3 heads, 10.5 compression, btr stg 3 stroker cam, E85, kooks 1-7/8" headers,k&n intake,vmaxx tb,mgw,rxt,bmr 1.5" drop springs,bmr poly cradle bushings,bmr toe rods,bmr trailing arms,bmr uca,bmr diff bushings
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