Npp question
Thread Starter
Advanced
Joined: Sep 2016
Posts: 75
Likes: 1
From: Tx
Npp question
I have 2008 corvette. I bought my corvette with stock exhaust and flowmaster muffler. It came with npp and I want to put them back on. I have lg exhaust setup with flowmaster now. I don't know how the npp work or how to set it up. Is there something I need for the npp to work right when install?
Racer
Joined: Nov 2016
Posts: 478
Likes: 18
From: Cape Coral Florida
I have 2008 corvette. I bought my corvette with stock exhaust and flowmaster muffler. It came with npp and I want to put them back on. I have lg exhaust setup with flowmaster now. I don't know how the npp work or how to set it up. Is there something I need for the npp to work right when install?
Melting Slicks
Joined: Mar 2016
Posts: 2,211
Likes: 237
From: Indianapolis IN
**None of these pictures are my own. I found them all using google search.
The NPP system works using vacuum from your engine which is plumbed from the back passenger side of your intake manifold to the rear of the car.
The small nipple on the back of the intake is seen in this close up of a stock intake.
Here is what the line in the engine bay looks like. The one he is pointing to is it. The small round thing down the line is a check valve.
In the outlet of the exhaust tips there is one tip on each muffler that has a butterfly valve installed in it. These butterfly valves are actuated using that vacuum. When these valves are closed it forces the exhuast gasses through a chamber that muffles the noise.
See the round vacuum actuator at rear just before tip? Also look at those butterflys.
Here is a better picture outside the vehicle.
Here is the inside of the muffler to see where the gasses flow.
This is the rear equipment you need to make sure you still have in order for the NPP actuators to work. If you are lucky they will just have capped the lines to the actuators. If not, they may have sold all of it except the line from front to rear.
Here is a pic of what you need to be in the rear of the car. These are lines, a reservoir, a solenoid, and a few other odds and ends. Not the end of the world if you need this stuff. Junkyards are full of it.
Your computer decides when to open or close these valves based on user input. That is unless you either remove the NPP fuse (open all the time) or you buy a mild to wild switch that allows you to decide when to actuate them.
Here is the location of the fuse for the solenoid that controls vacuum for valves. It is a 10a fuse.
Keep in mind that you have other options that are NPP capable such as Akrapovic or Bill Boat Fusion. You don't have to run stock (quiet even open) NPP mufflers.
The NPP system works using vacuum from your engine which is plumbed from the back passenger side of your intake manifold to the rear of the car.
The small nipple on the back of the intake is seen in this close up of a stock intake.
Here is what the line in the engine bay looks like. The one he is pointing to is it. The small round thing down the line is a check valve.
In the outlet of the exhaust tips there is one tip on each muffler that has a butterfly valve installed in it. These butterfly valves are actuated using that vacuum. When these valves are closed it forces the exhuast gasses through a chamber that muffles the noise.
See the round vacuum actuator at rear just before tip? Also look at those butterflys.
Here is a better picture outside the vehicle.
Here is the inside of the muffler to see where the gasses flow.
This is the rear equipment you need to make sure you still have in order for the NPP actuators to work. If you are lucky they will just have capped the lines to the actuators. If not, they may have sold all of it except the line from front to rear.
Here is a pic of what you need to be in the rear of the car. These are lines, a reservoir, a solenoid, and a few other odds and ends. Not the end of the world if you need this stuff. Junkyards are full of it.
Your computer decides when to open or close these valves based on user input. That is unless you either remove the NPP fuse (open all the time) or you buy a mild to wild switch that allows you to decide when to actuate them.
Here is the location of the fuse for the solenoid that controls vacuum for valves. It is a 10a fuse.
Keep in mind that you have other options that are NPP capable such as Akrapovic or Bill Boat Fusion. You don't have to run stock (quiet even open) NPP mufflers.
Instructor
Joined: Mar 2015
Posts: 215
Likes: 23
From: Snohomish County, WA
**None of these pictures are my own. I found them all using google search.
The NPP system works using vacuum from your engine which is plumbed from the back passenger side of your intake manifold to the rear of the car.
The small nipple on the back of the intake is seen in this close up of a stock intake.
Here is what the line in the engine bay looks like. The one he is pointing to is it. The small round thing down the line is a check valve.
In the outlet of the exhaust tips there is one tip on each muffler that has a butterfly valve installed in it. These butterfly valves are actuated using that vacuum. When these valves are closed it forces the exhuast gasses through a chamber that muffles the noise.
See the round vacuum actuator at rear just before tip? Also look at those butterflys.
Here is a better picture outside the vehicle.
Here is the inside of the muffler to see where the gasses flow.
This is the rear equipment you need to make sure you still have in order for the NPP actuators to work. If you are lucky they will just have capped the lines to the actuators. If not, they may have sold all of it except the line from front to rear.
Here is a pic of what you need to be in the rear of the car. These are lines, a reservoir, a solenoid, and a few other odds and ends. Not the end of the world if you need this stuff. Junkyards are full of it.
Your computer decides when to open or close these valves based on user input. That is unless you either remove the NPP fuse (open all the time) or you buy a mild to wild switch that allows you to decide when to actuate them.
Here is the location of the fuse for the solenoid that controls vacuum for valves. It is a 10a fuse.
Keep in mind that you have other options that are NPP capable such as Akrapovic or Bill Boat Fusion. You don't have to run stock (quiet even open) NPP mufflers.
The NPP system works using vacuum from your engine which is plumbed from the back passenger side of your intake manifold to the rear of the car.
The small nipple on the back of the intake is seen in this close up of a stock intake.
Here is what the line in the engine bay looks like. The one he is pointing to is it. The small round thing down the line is a check valve.
In the outlet of the exhaust tips there is one tip on each muffler that has a butterfly valve installed in it. These butterfly valves are actuated using that vacuum. When these valves are closed it forces the exhuast gasses through a chamber that muffles the noise.
See the round vacuum actuator at rear just before tip? Also look at those butterflys.
Here is a better picture outside the vehicle.
Here is the inside of the muffler to see where the gasses flow.
This is the rear equipment you need to make sure you still have in order for the NPP actuators to work. If you are lucky they will just have capped the lines to the actuators. If not, they may have sold all of it except the line from front to rear.
Here is a pic of what you need to be in the rear of the car. These are lines, a reservoir, a solenoid, and a few other odds and ends. Not the end of the world if you need this stuff. Junkyards are full of it.
Your computer decides when to open or close these valves based on user input. That is unless you either remove the NPP fuse (open all the time) or you buy a mild to wild switch that allows you to decide when to actuate them.
Here is the location of the fuse for the solenoid that controls vacuum for valves. It is a 10a fuse.
Keep in mind that you have other options that are NPP capable such as Akrapovic or Bill Boat Fusion. You don't have to run stock (quiet even open) NPP mufflers.
.!!
Thread Starter
Advanced
Joined: Sep 2016
Posts: 75
Likes: 1
From: Tx
**None of these pictures are my own. I found them all using google search.
The NPP system works using vacuum from your engine which is plumbed from the back passenger side of your intake manifold to the rear of the car.
The small nipple on the back of the intake is seen in this close up of a stock intake.
Here is what the line in the engine bay looks like. The one he is pointing to is it. The small round thing down the line is a check valve.
In the outlet of the exhaust tips there is one tip on each muffler that has a butterfly valve installed in it. These butterfly valves are actuated using that vacuum. When these valves are closed it forces the exhuast gasses through a chamber that muffles the noise.
See the round vacuum actuator at rear just before tip? Also look at those butterflys.
Here is a better picture outside the vehicle.
Here is the inside of the muffler to see where the gasses flow.
This is the rear equipment you need to make sure you still have in order for the NPP actuators to work. If you are lucky they will just have capped the lines to the actuators. If not, they may have sold all of it except the line from front to rear.
Here is a pic of what you need to be in the rear of the car. These are lines, a reservoir, a solenoid, and a few other odds and ends. Not the end of the world if you need this stuff. Junkyards are full of it.
Your computer decides when to open or close these valves based on user input. That is unless you either remove the NPP fuse (open all the time) or you buy a mild to wild switch that allows you to decide when to actuate them.
Here is the location of the fuse for the solenoid that controls vacuum for valves. It is a 10a fuse.
Keep in mind that you have other options that are NPP capable such as Akrapovic or Bill Boat Fusion. You don't have to run stock (quiet even open) NPP mufflers.
The NPP system works using vacuum from your engine which is plumbed from the back passenger side of your intake manifold to the rear of the car.
The small nipple on the back of the intake is seen in this close up of a stock intake.
Here is what the line in the engine bay looks like. The one he is pointing to is it. The small round thing down the line is a check valve.
In the outlet of the exhaust tips there is one tip on each muffler that has a butterfly valve installed in it. These butterfly valves are actuated using that vacuum. When these valves are closed it forces the exhuast gasses through a chamber that muffles the noise.
See the round vacuum actuator at rear just before tip? Also look at those butterflys.
Here is a better picture outside the vehicle.
Here is the inside of the muffler to see where the gasses flow.
This is the rear equipment you need to make sure you still have in order for the NPP actuators to work. If you are lucky they will just have capped the lines to the actuators. If not, they may have sold all of it except the line from front to rear.
Here is a pic of what you need to be in the rear of the car. These are lines, a reservoir, a solenoid, and a few other odds and ends. Not the end of the world if you need this stuff. Junkyards are full of it.
Your computer decides when to open or close these valves based on user input. That is unless you either remove the NPP fuse (open all the time) or you buy a mild to wild switch that allows you to decide when to actuate them.
Here is the location of the fuse for the solenoid that controls vacuum for valves. It is a 10a fuse.
Keep in mind that you have other options that are NPP capable such as Akrapovic or Bill Boat Fusion. You don't have to run stock (quiet even open) NPP mufflers.
Melting Slicks
Joined: Mar 2016
Posts: 2,211
Likes: 237
From: Indianapolis IN
No problem. I run the B&B Fusion setup. If you ever decide to upgrade you cannot go wrong with them. It looks great and sounds amazing.
Good luck with your install.
