Simple NPP Controller?
Thread Starter
4th Gear
Joined: Aug 2013
Posts: 4
Likes: 0
Simple NPP Controller?
I've done tons of searching both on the forum and off and cannot find an answer to this:
Does anyone make a SIMPLE NPP exhaust controller?
Meaning: I've added NPP mufflers and I don't really care about them opening / closing automatically based on rpm / throttle position / vacuum from the manifold - I only want to be able to open / close them manually on a switch.
I'm guessing this just means a simple vacuum pump that could be switched on and off which would eliminate the need of running a vacuum line off the manifold to the rear of the car.
Does anyone make such a thing?
Thanks in advance!
Does anyone make a SIMPLE NPP exhaust controller?
Meaning: I've added NPP mufflers and I don't really care about them opening / closing automatically based on rpm / throttle position / vacuum from the manifold - I only want to be able to open / close them manually on a switch.
I'm guessing this just means a simple vacuum pump that could be switched on and off which would eliminate the need of running a vacuum line off the manifold to the rear of the car.
Does anyone make such a thing?
Thanks in advance!
Thread Starter
4th Gear
Joined: Aug 2013
Posts: 4
Likes: 0
Hmm... all the ones I've seen - regardless of the opening at rpm option - still require a vacuum line from the manifold. Can you link to one that doesn't?
I'm trying to avoid having to tap into the vacuum system of the car and run the line as I really don't care about the functionality that would add. It would be a much much easier thing if I could find a controller that supplied its own vacuum - meaning all I would have to do it run switched power to it ... and then its vacuum line to the mufflers.
I'm trying to avoid having to tap into the vacuum system of the car and run the line as I really don't care about the functionality that would add. It would be a much much easier thing if I could find a controller that supplied its own vacuum - meaning all I would have to do it run switched power to it ... and then its vacuum line to the mufflers.
Last edited by jnance50; Sep 16, 2013 at 01:52 PM.
Burning Brakes
Joined: Jun 2002
Posts: 835
Likes: 21
From: Mooresville NC
Hmm... all the ones I've seen - regardless of the opening at rpm option - still require a vacuum line from the manifold. Can you link to one that doesn't?
I'm trying to avoid having to tap into the vacuum system of the car and run the line as I really don't care about the functionality that would add. It would be a much much easier thing if I could find a controller that supplied its own vacuum - meaning all I would have to do it run switched power to it ... and then its vacuum line to the mufflers.
I'm trying to avoid having to tap into the vacuum system of the car and run the line as I really don't care about the functionality that would add. It would be a much much easier thing if I could find a controller that supplied its own vacuum - meaning all I would have to do it run switched power to it ... and then its vacuum line to the mufflers.
Not really a way around this since the entire system operates off of vacuum pressure. The valve on the intake literally "sucks" the valves closed when it's in an off position. You could probably do this with some sort of pump on your own, but I don't see how that'd been economical.
Racer
Joined: Feb 2008
Posts: 326
Likes: 0
From: Norman OK
Don't think there will be a cheap, small, quiet vac pump that can hold them closed reliably.
You could get a mighty vac and run it into the cab. Pump it a couple times for quiet.
I want t o hook a set up with only manifold vacuum and see how it acts. No controller at all.
You could get a mighty vac and run it into the cab. Pump it a couple times for quiet.
I want t o hook a set up with only manifold vacuum and see how it acts. No controller at all.
Thread Starter
4th Gear
Joined: Aug 2013
Posts: 4
Likes: 0
I've seen Camaros with the ls3 hooked straight to manifold and it does work, it just opens at 50% throttle give or take (vs the Vette 's factory 3500 rpm). Actually I'm pretty sure this is how most aftermarket "Npp in a box" kits work (with exception of the one that integrates into the DIC). They're basically an electric switch that just cuts the vacuum between the engine and exhaust when in "wild" and directly connects the intake vacuum to the exhaust when in "mild". Hypothetically, one could accomplish the same thing with one of these, in the correct diameter of course:
http://amzn.com/B0042HLS3K
Someone feel free to correct me if I'm wrong, admittedly I'm new to this whole Corvette thing.
I've seen someone in the Camaro forum use a vacuum pump and canister off of another vehicle and accomplish what I'm looking to do - I just wondered if someone in the aftermarket had done anything similar. I hadn't however considered the noise of such a pump - perhaps that would be the problem with such a solution.
Still curious if anyone has tried anything similar.
Something like this, mounted behind the tail lamp or in the fender:
http://amzn.com/B0030Z666E
http://amzn.com/B0042HLS3K
Someone feel free to correct me if I'm wrong, admittedly I'm new to this whole Corvette thing.
I've seen someone in the Camaro forum use a vacuum pump and canister off of another vehicle and accomplish what I'm looking to do - I just wondered if someone in the aftermarket had done anything similar. I hadn't however considered the noise of such a pump - perhaps that would be the problem with such a solution.
Still curious if anyone has tried anything similar.
Something like this, mounted behind the tail lamp or in the fender:
http://amzn.com/B0030Z666E
Last edited by jnance50; Sep 16, 2013 at 04:08 PM.
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Tech Contributor
Joined: Oct 1999
Posts: 41,066
Likes: 9,834
From: Charlotte, NC (formerly Endicott, NY)
Something like this, mounted behind the tail lamp or in the fender:
http://amzn.com/B0030Z666E
http://amzn.com/B0030Z666E
The vacuum switch would be your best option. Just T into an engine manifold vacuum source and run it to the switch. Then just wire the switch so you can control it with a foot switch in the cabin.
With vacuum routed to the exhaust the mufflers will be quiet until you open the throttle enough to reduce vacuum to the point the muffler valves open which is pretty much the way the stock system operates. You won't get unmetered air into the manifold since the system is sealed if you connect the hoses correctly and your muffler valves don't have any leaks in them.
Bill
Instructor
Joined: Mar 2006
Posts: 222
Likes: 3
From: Campbell CA
Is it just the act of running the vacuum hose to the manifold that bothers you? I'm not trying to flame you, but my guess is that it took me less time to run the hose than you have spent researching an alternative. The only part that was difficult was cutting the "T" off the vacuum connector on the back of the manifold. I don't think it took more than a couple hours for the total installation.
I have the Exhaust Commander(not the Elite). I love it. Push the button and they open, push it again and they close.
I have the Exhaust Commander(not the Elite). I love it. Push the button and they open, push it again and they close.