Installing NPP on non NPP car
Thread Starter
Racer
Joined: Feb 2015
Posts: 274
Likes: 9
Installing NPP on non NPP car
My uncle wants the NPP exhaust installed on his 2013. He doesn't want to hook up any vacuum lines or anything, he just wants to put it on and keep the flaps open. Is here a way to do this. Just keep the flaps open without installing an vacuum lines or anything?
Race Director
Joined: Sep 2007
Posts: 16,557
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From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
It might be nice if he plugs the vacuum port so dirt is kept out, in case he wants to close the flaps in the future.
Race Director
Joined: Dec 2013
Posts: 12,502
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Tell uncle that he should install either a Corsa extreme or Borla Atak mufflers instead. Hence this will give him the sound he is looking for, with none of the drone that the NPP mufflers will have with the gates open instead.
The Corsa system has more of a V10 sound, while the Borla is lower pitch 70's style musle car tone instead.
Race Director
Joined: May 2004
Posts: 16,667
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From: Raleigh, NC
St. Jude Donor '15
Flaps will be open by default.. so just install them and it'll work.
The drone on them is horrible under about 1800 RPM's FYI
The drone on them is horrible under about 1800 RPM's FYI
Last edited by schpenxel; Jan 10, 2016 at 05:36 PM.
Safety Car
Joined: Jul 2009
Posts: 3,755
Likes: 190
From: Baton Rouge LA
St. Jude Donor '14, '16
He's gonna want to close them when cruising for sure.I saw you mention in the past that you were going to install the factory npp electronics/vacuum setup on your car...did you ever find out what's needed so that you can use your dashlogic to control them? I have a couple of friends with non-npp cars that would be interested so I'm curious.
Race Director
Joined: May 2004
Posts: 16,667
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From: Raleigh, NC
St. Jude Donor '15
Yep. I installed the whole setup
It's fairly simple actually. Controller connects to power, one wire to the serial bus, then one wire as an output to the NPP solenoid
NPP solenoid connects to controller and ground. Run vacuum to solenoid and solenoid to NPP flaps and there ya go.
If you want it to 100% behave like a factory corvette than you need a 1 way valve on the vacuum hose. If you want it to open automatically around -2psi then leave it out
Here's a post that covers most of it. I put the controller in the passenger foot well. There's a nice spot for it and there's a serial bus connection near there that you can splice off of.
https://www.corvetteforum.com/forums...post1591003860
Dash logic works perfect. I removed the 1 way valve so I can't keep it 100% quiet all the time (went very rich when I kept the flaps closed while in boost). So now I can make it loud all the time or I can make it be closed until -2psi then open after that.
It's fairly simple actually. Controller connects to power, one wire to the serial bus, then one wire as an output to the NPP solenoid
NPP solenoid connects to controller and ground. Run vacuum to solenoid and solenoid to NPP flaps and there ya go.
If you want it to 100% behave like a factory corvette than you need a 1 way valve on the vacuum hose. If you want it to open automatically around -2psi then leave it out
Here's a post that covers most of it. I put the controller in the passenger foot well. There's a nice spot for it and there's a serial bus connection near there that you can splice off of.
https://www.corvetteforum.com/forums...post1591003860
Dash logic works perfect. I removed the 1 way valve so I can't keep it 100% quiet all the time (went very rich when I kept the flaps closed while in boost). So now I can make it loud all the time or I can make it be closed until -2psi then open after that.
Last edited by schpenxel; Jan 12, 2016 at 09:47 PM.
Safety Car
Joined: Jul 2009
Posts: 3,755
Likes: 190
From: Baton Rouge LA
St. Jude Donor '14, '16
Yep. I installed the whole setup
It's fairly simple actually. Controller connects to power, one wire to the serial bus, then one wire as an output to the NPP solenoid
NPP solenoid connects to controller and ground. Run vacuum to solenoid and solenoid to NPP flaps and there ya go.
If you want it to 100% behave like a factory corvette than you need a 1 way valve on the vacuum hose. If you want it to open automatically around -2psi then leave it out
Here's a post that covers most of us. I put the controller in the passenger foot well. There's a nice spot for it and there's a serial bus connection near there that you can splice off of.
https://www.corvetteforum.com/forums...post1591003860
It's fairly simple actually. Controller connects to power, one wire to the serial bus, then one wire as an output to the NPP solenoid
NPP solenoid connects to controller and ground. Run vacuum to solenoid and solenoid to NPP flaps and there ya go.
If you want it to 100% behave like a factory corvette than you need a 1 way valve on the vacuum hose. If you want it to open automatically around -2psi then leave it out
Here's a post that covers most of us. I put the controller in the passenger foot well. There's a nice spot for it and there's a serial bus connection near there that you can splice off of.
https://www.corvetteforum.com/forums...post1591003860
Racer
Joined: Dec 2015
Posts: 488
Likes: 59
From: New Melle, Missouri
2018 C6 of Year Finalist
Tell uncle that he should install either a Corsa extreme or Borla Atak mufflers instead. Hence this will give him the sound he is looking for, with none of the drone that the NPP mufflers will have with the gates open instead.
The Corsa system has more of a V10 sound, while the Borla is lower pitch 70's style musle car tone instead.
https://youtu.be/cTJSVxTuzpE
https://youtu.be/K1Afn3X_3yg
The Corsa system has more of a V10 sound, while the Borla is lower pitch 70's style musle car tone instead.
https://youtu.be/cTJSVxTuzpE
https://youtu.be/K1Afn3X_3yg
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Melting Slicks
Joined: Sep 2008
Posts: 2,360
Likes: 59
From: San Jose California
Tell uncle that he should install either a Corsa extreme or Borla Atak mufflers instead. Hence this will give him the sound he is looking for, with none of the drone that the NPP mufflers will have with the gates open instead.
The Corsa system has more of a V10 sound, while the Borla is lower pitch 70's style musle car tone instead.
https://youtu.be/cTJSVxTuzpE
https://youtu.be/K1Afn3X_3yg
The Corsa system has more of a V10 sound, while the Borla is lower pitch 70's style musle car tone instead.
https://youtu.be/cTJSVxTuzpE
https://youtu.be/K1Afn3X_3yg
DJ