Looking for documentation on NPP operation - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Indydriver · 03-01-2014, 05:21 PM

I've read NPP programming opens the valves at idle, then closes them until 3500 then re-opens them. Is this correct? Does anyone have Documentation of this? Is there any way to keep the valves closed at all time until 3500? Yes, I've looked at the Mild2Wild but that appears to have only two modes: open all the time or factory settings which would still leave the valves open at idle. Get what I'm looking for? A quieter startup.

mhoskins76 · 03-01-2014, 06:05 PM

I thougt there was something out so that the valves would be closed until you wanted them opened....maybe not??

Indydriver · 03-01-2014, 06:44 PM

I think you are thinking about this device which I mention in the first post:

http://www.apex-speed.com/mild2wild.html

You don't really get "full" control, you get two modes: factory and open full time. If you rad the product description, it seems to suggest that the factory setting is always closed below 3500. Maybe the idea that I picked up that it was open at idle was wrong. I would be happy to determine that. That's why I'm looking for some documentation on exactly what RPM the factory setting opens and closes. Of course, there's nothing in the nowner's manual (thank you GM). Maybe I can get the CS rep to find out.

h018871 · 03-01-2014, 07:20 PM

Indydriver
take a look here http://www.camaro5.com/forums/showthread.php?t=318683

not really documentation, but an overview

oh, and i'm not trying to be a jerk..........search NPP or dual mode exhaust. there's lots of posts on c5 with various options to control NPP

one more: welcome and enjoy your new Camaro!

Indydriver · 03-01-2014, 07:28 PM

Quote:

Originally Posted by h018871

Indydriver
take a look here http://www.camaro5.com/forums/showthread.php?t=318683

not really documentation, but an overview

oh, and i'm not trying to be a jerk..........search NPP or dual mode exhaust. there's lots of posts on c5 with various options to control NPP

one more: welcome and enjoy your new Camaro!

Oh believe me, I've searched. The problem is, you get every thread that ever mentions NPP and I'm just not going to wade through all of those when someone will see this and have the answer. Easy. In fact, i have read your thread. It does NOT answer my question.

h018871 · 03-01-2014, 09:17 PM

Quote:

Originally Posted by Indydriver

Is there any way to keep the valves closed at all time until 3500?

Get what I'm looking for? A quieter startup.

Quote:

Originally Posted by Indydriver

In fact, i have read your thread. It does NOT answer my question.

hmmmmm, i guess i missed something...........

the DIY is specifically about having the flaps closed at startup

the barber · 03-01-2014, 10:30 PM

Quieter startup with an uprgraded exhaust option...

thkfast · 03-02-2014, 02:10 AM

I know I've read a thread that describes a device that keeps the valve CLOSED = full time quiet. I don't remember where it was...I just recall it seemed counter intuitive at the time.

Indydriver · 03-02-2014, 06:02 AM

Quote:

Originally Posted by Fundando

The valves will open un after 3000 rpm and >25% throttle

So they do not open at startup and fast idle?

Indydriver · 03-02-2014, 06:04 AM

Quote:

Originally Posted by h018871

hmmmmm, i guess i missed something...........

the DIY is specifically about having the flaps closed at startup

So, they are open at startup/fast idle?

Chi-One · 03-02-2014, 07:14 AM

Quote:

Originally Posted by Indydriver

So, they are open at startup/fast idle?

Yes, they are open at start up and fast idle.

Indydriver · 03-02-2014, 08:13 AM

Quote:

Originally Posted by Chi-One

Yes, they are open at start up and fast idle.

OK, great. That's what I said my understanding was in post 1. What I want is to have the valves closed from startup until 3000 or so. My reading of M2W is that it doesn't do that. It has two modes: open all the time or factory settings.

So I guess h018871's home made solution is the only known method of getting the flaps closed at idle?

03-01-2014, 05:21 PM	#1
Indydriver Drives: '14 2SS/RS Vert 6M/KTU/NPP/DTA/ARH Join Date: Jan 2014 Location: Indianapolis Posts: 2,826	Looking for documentation on NPP operation I've read NPP programming opens the valves at idle, then closes them until 3500 then re-opens them. Is this correct? Does anyone have Documentation of this? Is there any way to keep the valves closed at all time until 3500? Yes, I've looked at the Mild2Wild but that appears to have only two modes: open all the time or factory settings which would still leave the valves open at idle. Get what I'm looking for? A quieter startup. __________________ Consensus is, by definition, a lack of leadership.

03-01-2014, 06:05 PM	#2
mhoskins76 HTWEELZ Drives: 2013 2SS Hot Wheels Edition Join Date: Jan 2013 Location: Fort McMurray, Alberta Posts: 1,018	I thougt there was something out so that the valves would be closed until you wanted them opened....maybe not?? __________________ 2013 2SS Hot Wheels Edition 727 of 1524 w/ Dual Mode Performance Exhaust, Nav, and Performance Shifter. DELIVERED APRIL 22nd, 2013 and enjoying every minute since! Mods: Cold Air Inductions CAI, CNC Ported Throttle Body, Elite Engineering Oil Catch Can, Smoked Spyder LED Tail Lights, 12" JBL Sub, JBL Amp, Stealth Sub Box, American Racing LT headers and hi-flo cats, Tuned by Davenport, Custom painted interior pieces, Custom painted hood liner and trunk liner, Niche Targa M-130 wheels, LED side markers

03-01-2014, 06:44 PM	#3
Indydriver Drives: '14 2SS/RS Vert 6M/KTU/NPP/DTA/ARH Join Date: Jan 2014 Location: Indianapolis Posts: 2,826	I think you are thinking about this device which I mention in the first post: http://www.apex-speed.com/mild2wild.html You don't really get "full" control, you get two modes: factory and open full time. If you rad the product description, it seems to suggest that the factory setting is always closed below 3500. Maybe the idea that I picked up that it was open at idle was wrong. I would be happy to determine that. That's why I'm looking for some documentation on exactly what RPM the factory setting opens and closes. Of course, there's nothing in the nowner's manual (thank you GM). Maybe I can get the CS rep to find out. __________________ Consensus is, by definition, a lack of leadership.

03-01-2014, 07:20 PM	#4
h018871 Geoff Drives: 2020 ZL1 Green Join Date: May 2013 Location: Houston Posts: 1,720	Indydriver take a look here http://www.camaro5.com/forums/showthread.php?t=318683 not really documentation, but an overview oh, and i'm not trying to be a jerk..........search NPP or dual mode exhaust. there's lots of posts on c5 with various options to control NPP one more: welcome and enjoy your new Camaro! __________________ Having a Blast https://www.camaro6.com/forums/showt...php?p=10741733

03-01-2014, 10:30 PM	#7
the barber Drives: 13' Sw 2ss Ls3 Join Date: Dec 2012 Location: porterville ca Posts: 543	Quieter startup with an uprgraded exhaust option...

03-02-2014, 02:10 AM	#8
thkfast Drives: '14 Red 2SS/RS/LS3 Join Date: Dec 2013 Location: Cedar Rapids, IA Posts: 692	I know I've read a thread that describes a device that keeps the valve CLOSED = full time quiet. I don't remember where it was...I just recall it seemed counter intuitive at the time.