Dual Mode NPP Exhaust Sound Question

njweatherman · 10-04-2018, 06:05 PM

2018 2ss automatic with dual mode npp exhaust and K&N cold air intake.

When I am cruising around at a steady speed and gently hit the acceleration, the car accelerates smoothly.

However, when I am cruising around at a steady speed and floor it, there is a brief hesitation, I hear a click and then the car moves. At first I though it was the AFM, but when I floored it, the DIC said it was still in V8 mode.
Am I hearing and feeling the dual npp exhaust valves opening?

Lastly: no click heard or hesitation felt when flooring it from a direct stop, which makes me think it is the dual mode npp exhaust valves. Any ideas?

drperry · 10-04-2018, 08:06 PM

The valves do not cause anywhere near enough restriction for that... That's the electronic throttle voodoo lagging.

Sent from my SM-G930W8 using Tapatalk

njweatherman · 10-05-2018, 04:38 AM

Thanks for the reply.

whitelightning011 · 10-05-2018, 09:27 AM

From what I've gathered, a tune will remove this throttle lag and improve responsiveness. I'm waiting until my warranty is over to tune my car for the same reason.

njweatherman · 10-05-2018, 02:20 PM

Thanks! I'm not going near that engine until the warranty is over. LOL!

crosive · 10-05-2018, 02:39 PM

yes yes, torque management is a pain, but atleast you are A8, and can tune it out. I don't believe the M6 guys even have the option.

10-04-2018, 06:05 PM	#1
njweatherman Drives: 2018 Camaro 2SS, redline edition Join Date: Jun 2013 Location: Hackettstown, NJ Posts: 209	Dual Mode NPP Exhaust Sound Question 2018 2ss automatic with dual mode npp exhaust and K&N cold air intake. When I am cruising around at a steady speed and gently hit the acceleration, the car accelerates smoothly. However, when I am cruising around at a steady speed and floor it, there is a brief hesitation, I hear a click and then the car moves. At first I though it was the AFM, but when I floored it, the DIC said it was still in V8 mode. Am I hearing and feeling the dual npp exhaust valves opening? Lastly: no click heard or hesitation felt when flooring it from a direct stop, which makes me think it is the dual mode npp exhaust valves. Any ideas? Last edited by njweatherman; 10-04-2018 at 07:08 PM.

10-04-2018, 08:06 PM	#2
drperry Drives: Chevy Blazer Join Date: Sep 2009 Location: Grande Prairie, AB Posts: 300	The valves do not cause anywhere near enough restriction for that... That's the electronic throttle voodoo lagging. Sent from my SM-G930W8 using Tapatalk

10-05-2018, 04:38 AM	#3
njweatherman Drives: 2018 Camaro 2SS, redline edition Join Date: Jun 2013 Location: Hackettstown, NJ Posts: 209	Thanks for the reply.

10-05-2018, 09:27 AM	#4
whitelightning011 Drives: '16 1SS A8 w/ NPP Join Date: Nov 2016 Location: New York Posts: 117	From what I've gathered, a tune will remove this throttle lag and improve responsiveness. I'm waiting until my warranty is over to tune my car for the same reason.

10-05-2018, 02:20 PM	#5
njweatherman Drives: 2018 Camaro 2SS, redline edition Join Date: Jun 2013 Location: Hackettstown, NJ Posts: 209	Thanks! I'm not going near that engine until the warranty is over. LOL!

10-05-2018, 02:39 PM	#6
crosive Drives: 18 zl1 Join Date: Aug 2017 Location: central alabama Posts: 935	yes yes, torque management is a pain, but atleast you are A8, and can tune it out. I don't believe the M6 guys even have the option.

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