Observation of NPP Exhaust / Crimped Exhaust pipes - Page 2

Subperfect · 01-11-2016, 05:59 PM

http://www.camaro6.com/forums/showthread.php?t=431040

KaBoom1701 · 01-11-2016, 06:13 PM

I'm sure it's for making sure cabin drone is not too bad in the car...

I don't think GM would put these on a rate the engine HP lower for the hell of it. lol

bbrown450 · 01-11-2016, 06:15 PM

It's done for cancelation of certain tones and minimize drone...

ULTRAZLS1 · 01-11-2016, 07:56 PM

Holy cow...without seeing the pics I thought everyone was being anal.

That's pretty significant...

Not sure it will effect a stock car much....but when the hp numbers start rising that could be a bottleneck....

I was planning on standard SS exhaust anyway and will go aftermarket...one more reason now I guess...

Tr6 · 01-11-2016, 09:00 PM

Holy hell that's crazy! I will take a look next time I have the car on jackstands or on a lift!

Kracka · 01-11-2016, 09:25 PM

Resonance tuning/drone cancellation.

SS 1LE · 01-11-2016, 09:57 PM

Quote:

Originally Posted by Kracka

Resonance tuning/drone cancellation.

Yup, the 5.0 Coyotes have had similar "dents" since day one.

BradfordCamaro · 01-12-2016, 04:22 AM

I look at it as they did it to increase the exhuast velocity as it exits the 'Performance Reducers'

Creating ferocious sound and power!

Can't always think negative.....

drivingagain · 01-12-2016, 09:20 AM

Quote:

Originally Posted by BradfordCamaro

I look at it as they did it to increase the exhuast velocity as it exits the 'Performance Reducers'

Creating ferocious sound and power!

Can't always think negative.....

Makes me sleep better at night Brad thank you for the in depth explanation.

I think most of us with NPP are going to buy headers and replace the pipe back to the mufflers if dyno's show a improvement any ways.

I can say I love the NPP exhaust! It does work well.

Kracka · 01-12-2016, 09:27 AM

I'm going to take this off-topic for a second, but remember that bigger piping isn't always better. The C7 guys are now figuring out that by swapping to 3.0" X-pipes (Corsa) rather than 2.75" ( stock & Borla) they're losing torque down low which is actually increasing 1/4 mile times and reducing trap speeds. From an email exchange I had with David Borla, their testing indicated that 2.75" diameter piping is ideal for a strong overall curve with the LT1/4 when retaining the primary cats.

vtirocz · 01-12-2016, 10:48 AM

Quote:

Originally Posted by Sledgehammer70

So, any theory on why this is? Having my car on a lift and on the ground, it looks like there is plenty of clearance. Could this be damping the sound and or performance?

I am working with my brother in-law to see how we can add an H-Pipe and have a better flow on this section of pipes for the NPP system.

Can you post a picture from the side to illustrate how far that is crushed down? Do the non-NPP exhausts have that as well?

jimmypop13 · 01-12-2016, 12:15 PM

Quote:

Originally Posted by vtirocz

Can you post a picture from the side to illustrate how far that is crushed down? Do the non-NPP exhausts have that as well?

Yes, non-NPP is the same

jimmypop13 · 01-12-2016, 12:18 PM

Quote:

Originally Posted by drivingagain

Makes me sleep better at night Brad thank you for the in depth explanation.

I think most of us with NPP are going to buy headers and replace the pipe back to the mufflers if dyno's show a improvement any ways.

I can say I love the NPP exhaust! It does work well.

This indention is after the AFM valves. I know for me personally anyway, if I go the header/x-pipe route I still want my afm valves to keep the sound and vibrations down in v4 mode, and I still want v4 mode for the gas mileage. I wonder if aftermarket x-pipes will stop before the afm valves , go all the way back and get rid of them, or include their own afm valves

Bitchin' Camaro · 01-13-2016, 05:11 PM

Pretty sure we aren't giving up any power. Check out this video of them bashing the cr@p out of some headers on a dyno

http://youtu.be/azPKIjxmmdU

01-11-2016, 06:13 PM	#16
KaBoom1701 KaBoom1701 Drives: 13' ZL1 Red M6 Join Date: Dec 2012 Location: I.E. SoCal (Yucaipa) Posts: 8,631	I'm sure it's for making sure cabin drone is not too bad in the car... I don't think GM would put these on a rate the engine HP lower for the hell of it. lol __________________ Mods: Roto-Fab Intake, WW Res. kit & Big Gulp Air Scoop, Elite Catch Can, ATI Super Damper & 18% OD Pulley, LF Idler pulley bracket, Metco CC breather, ID850 Injectors, Stainless Power Headers w/ ceramic coating, TR71X Spark Plugs, JMS Fuel Pump Booster, Bo White TB, Tuned by Ted @ Jannetty Racing, Ron Davis HX, D3 Reservoir, Pfadt 1" Springs, Moreno Camber Plates, ZL1 Addons Splitter guard washers, Tow Hook kit & rock guards, Hurst Shifter Billet Plus 6 Speed Short Shifter, ZL1 DRL lighting harness, ZL1 Recaro Seats.

01-11-2016, 09:00 PM	#19
Tr6 The Dogfather Drives: #1 off the line for a customer. '16 Join Date: Oct 2015 Location: Andover, KS Posts: 2,621	Holy hell that's crazy! I will take a look next time I have the car on jackstands or on a lift! __________________ 2SS, Garnet Red with Adrenalin red, NPP, MRC M6 coupe #33 off the line #1 order for Customer. Build thread HERE! Story of my delivery HERE!

01-12-2016, 04:22 AM	#22
BradfordCamaro SABIO Drives: 2016 CAMARO 1SS Join Date: Jul 2015 Location: Bradford, ON Posts: 5,013	I look at it as they did it to increase the exhuast velocity as it exits the 'Performance Reducers' Creating ferocious sound and power! Can't always think negative..... __________________

01-13-2016, 05:11 PM	#28
Bitchin' Camaro Drives: 2016 Camaro 2SS Mosaic Black/Black Join Date: Dec 2015 Location: NE Ohio Posts: 64	Pretty sure we aren't giving up any power. Check out this video of them bashing the cr@p out of some headers on a dyno http://youtu.be/azPKIjxmmdU __________________ 2016 Camaro 2SS Mosaic Black/Black, Low Gloss Black 5 spokes, Dual Mode Exhaust, MagRheo Shocks (GB8 56V NPP F55) http://www.last.fm/music/The+Dead+Mi...in'+Camaro 12/14/15 Dealer processed order TPW 1/25/16 1/21/16 Built and Bayed 1/28/16 At the dealer 1/29/16 Took delivery w/ 3 miles on it

01-11-2016, 05:59 PM	#15
Subperfect Drives: 16 Camaro Join Date: Aug 2015 Location: 805 Posts: 282	http://www.camaro6.com/forums/showthread.php?t=431040

01-11-2016, 06:15 PM	#17
bbrown450 Drives: 2016 Mosaic Black 2SS Join Date: Dec 2013 Location: Plant City Posts: 408	It's done for cancelation of certain tones and minimize drone...

01-11-2016, 07:56 PM	#18
ULTRAZLS1 Drives: 14 Silverado LTZ Z71, 16 Camaro SS Join Date: Nov 2009 Location: Jackson, Michigan Posts: 4,421	Holy cow...without seeing the pics I thought everyone was being anal. That's pretty significant... Not sure it will effect a stock car much....but when the hp numbers start rising that could be a bottleneck.... I was planning on standard SS exhaust anyway and will go aftermarket...one more reason now I guess...

01-11-2016, 09:25 PM	#20
Kracka Drives: 2021 Corvette Z51 Join Date: Dec 2014 Location: Oak Point, TX Posts: 151	Resonance tuning/drone cancellation.

01-12-2016, 09:27 AM	#24
Kracka Drives: 2021 Corvette Z51 Join Date: Dec 2014 Location: Oak Point, TX Posts: 151	I'm going to take this off-topic for a second, but remember that bigger piping isn't always better. The C7 guys are now figuring out that by swapping to 3.0" X-pipes (Corsa) rather than 2.75" ( stock & Borla) they're losing torque down low which is actually increasing 1/4 mile times and reducing trap speeds. From an email exchange I had with David Borla, their testing indicated that 2.75" diameter piping is ideal for a strong overall curve with the LT1/4 when retaining the primary cats.

User Name		Remember Me?
Password