NPP exhaust = 6 hp increase?

z28guy30 · 04-07-2016, 01:09 AM

According to GM the NPP exhaust option resulted in a 6 hp increase on the LS3 Corvette (430 to 436). It makes me wonder why the Camaro SS with NPP is not rated higher.

bpang1234 · 04-07-2016, 01:45 AM

Maybe they decided that the main marketing angle for the exhaust was the sound / looks and they didn't need to claim a handful of hp?

z28guy30 · 04-07-2016, 02:13 AM

Quote:

Originally Posted by bpang1234

Maybe they decided that the main marketing angle for the exhaust was the sound / looks and they didn't need to claim a handful of hp?

Possibly. I mean a 6 hp increase is pretty negligible, and the main purpose of NPP is producing an awesome exhaust note.

andrec10 · 04-07-2016, 06:40 AM

So as to not piss off Corvette Owners!

2016SS · 04-07-2016, 06:44 AM

Such a small increase would never feel it but I would take it

all adds up in the end.

Libra Red · 04-07-2016, 07:40 AM

Well it is included by default on their performance packs/models like the 1LE and ZL1. I'd imagine there's some small benefit. But who knows.

jdasnt3 · 04-07-2016, 08:10 AM

Well discussed topic here.

Blazin383 · 04-07-2016, 08:26 AM

My 2012 Vette had the NPP with the 436 hp. Ran a few buddies without the NPP and, as you can imagine, there was no real advantage....but it sure did sound nice!! With that car I had to buy a Mild-to-Wild controller to manually operate the exhaust. Of course I kept the exhaust open all the time because with it closed the Vette was quieter than my Camaro is in Stealth Mode. The one thing I really miss about the Vette was the sound on deceleration with the exhaust open. Lots of gurgle and burgle on the decel! Don't get much of that with the Camaro for whatever reason.

Jeb114 · 04-07-2016, 09:41 AM

SAE certification of a motors horsepower does not include the exhaust system. So no one can claim GM of false HP numbers they stick to the SAE rating.

Modshack · 04-07-2016, 12:08 PM

The Corvette has a more efficient exhaust path. Keep in mind, the exhaust changes direction twice (90 degrees each) before it exits the Camaro tips...

Corvette is essentially straight through, the outer tips being the NPP enabled side:

ParisTNDude · 04-08-2016, 11:09 AM

And what will we say if we find out the 455 HP was 6HP more than the non-NPP at 449 HP?...lol. I'm waiting for someone to DYNO the car with and without the NPP open to give us a definitive answer to this question. It's going to continue confounding Camar6 posters until we know...lol.

jdasnt3 · 04-08-2016, 11:17 AM

Quote:

Originally Posted by ParisTNDude

And what will we say if we find out the 455 HP was 6HP more than the non-NPP at 449 HP?...lol. I'm waiting for someone to DYNO the car with and without the NPP open to give us a definitive answer to this question. It's going to continue confounding Camar6 posters until we know...lol.

There's so many factors here. We dyno'd 402 stock. Is that 460ish HP? Maybe. LOL Either that or the drivetrain does not have typical 15% average loss.

Modshack · 04-08-2016, 11:26 AM

Quote:

Originally Posted by ParisTNDude

And what will we say if we find out the 455 HP was 6HP more than the non-NPP at 449 HP?...lol. I'm waiting for someone to DYNO the car with and without the NPP open to give us a definitive answer to this question. It's going to continue confounding Camar6 posters until we know...lol.

I'd bet the differences will be within the margin of error from run to run...Just like a lot of other bolt ons....Doubt you'd get anything conclusive out of that..

jdasnt3 · 04-08-2016, 11:36 AM

Quote:

Originally Posted by Modshack

I'd bet the differences will be within the margin of error from run to run...Just like a lot of other bolt ons....Doubt you'd get anything conclusive out of that..

Agreed. And at these power levels, 5-6HP difference won't amount to much at the track or on the street. NPP is all about sound and looks in my opinion. We love ours.

04-07-2016, 01:09 AM	#1
z28guy30 Drives: 2016 camaro 1ss Join Date: May 2011 Location: hawaii Posts: 326 View My Garage	NPP exhaust = 6 hp increase? According to GM the NPP exhaust option resulted in a 6 hp increase on the LS3 Corvette (430 to 436). It makes me wonder why the Camaro SS with NPP is not rated higher. __________________ 2016 Camaro SS, Summit White, A8, MRC, Rally Stripes, Black Bowties.

04-07-2016, 01:45 AM	#2
bpang1234 You can only YOLO once. Drives: '16 2SS & '15 Subaru Forester Join Date: Jan 2016 Location: Albany, OR Posts: 1,677	Maybe they decided that the main marketing angle for the exhaust was the sound / looks and they didn't need to claim a handful of hp? __________________ 2016 Camaro 2ss -Summit White / Ceramic White -8A, NPP, MRC, Ceramic White package plus knee pads, black bowties. -1st Car to have the "full" SEMA High Performance Graphics kit from 6LEDesigns. -1st Car to have the 6LEDesigns Blade Spoiler. -Borla S-Type w/ custom H-Pipe -Procharger P-1X Stage 2

04-07-2016, 06:40 AM	#4
andrec10 Drives: 2016 Camaro 2SS 6SP/Suby Legacy 6 Join Date: Oct 2015 Location: Hyde Park, NY Posts: 844	So as to not piss off Corvette Owners! __________________ TFPK40 Its Here! Finally came home on 3-31-16! Red Hot 2SS,6 Speed, NPP, MRC, Adrenaline Red interior, Silver Rally Stripes, NAV, Sunroof, 56W Split Spoke Wheels, Body color Hood vents, Body color Splash Guards and winter protection package. Ordered 1-28-16: 1100 2-11-2016 :2000 2-15-2016: 3000 TPW of 3/7...That went quick! 2-26-2016: 3400 Status TPW 3/7 3-5-2016 : 3800 3-8-2016 : 4300 3-11-2016 : 4B00 3-15-2016 : 4200 3-22-2016 : 4800 3-29-2016 : 6000!

04-07-2016, 06:44 AM	#5
2016SS Drives: 2016 Summit White 2SS Join Date: Jan 2016 Location: Ontario Posts: 423	Such a small increase would never feel it but I would take it all adds up in the end. __________________ 2003 Cadillac CTS Sold 2006 Nissan 350Z Sold 2008 Cobalt SS/TC Sold 2016 Camaro 2SS Summit built 3/28/16 delivered 2018 Camaro ZL1 cancelled by GM 😡 2019 Corvette 2lt Z51

04-07-2016, 08:10 AM	#7
jdasnt3 Drives: 18 Silverado 1500 Join Date: Dec 2015 Location: Bradenton, FL Posts: 1,721	Well discussed topic here. __________________ 16 Red Hot 2SS A8: NPP, CAI Cold air, Ported TB, Fasterproms Ported intake, E85 flex, Formatto tuned. 11.80@118 with 1.92 60' (600-700 DA) on stock run flats.

04-07-2016, 07:40 AM	#6
Libra Red Drives: 2016 Garnet Red 2SS Join Date: Mar 2016 Location: My Car Posts: 17	Well it is included by default on their performance packs/models like the 1LE and ZL1. I'd imagine there's some small benefit. But who knows.

04-07-2016, 08:26 AM	#8
Blazin383 Drives: 2016 SS Join Date: Mar 2016 Location: Richland WA Posts: 451	My 2012 Vette had the NPP with the 436 hp. Ran a few buddies without the NPP and, as you can imagine, there was no real advantage....but it sure did sound nice!! With that car I had to buy a Mild-to-Wild controller to manually operate the exhaust. Of course I kept the exhaust open all the time because with it closed the Vette was quieter than my Camaro is in Stealth Mode. The one thing I really miss about the Vette was the sound on deceleration with the exhaust open. Lots of gurgle and burgle on the decel! Don't get much of that with the Camaro for whatever reason.

04-07-2016, 09:41 AM	#9
Jeb114 Drives: 2021 300 Join Date: Jan 2015 Location: New Jersey Posts: 968	SAE certification of a motors horsepower does not include the exhaust system. So no one can claim GM of false HP numbers they stick to the SAE rating.

04-07-2016, 12:08 PM	#10
Modshack Drives: 2SS, Hyper Blue Join Date: Feb 2016 Location: Greenville NC Posts: 835	The Corvette has a more efficient exhaust path. Keep in mind, the exhaust changes direction twice (90 degrees each) before it exits the Camaro tips... Corvette is essentially straight through, the outer tips being the NPP enabled side: __________________ Steve Hyper Blue 2SS, 6M, NPP, Sunroof, Nav

04-08-2016, 11:09 AM	#11
ParisTNDude Owning SSes for 50 Years Drives: Sharkskin Grey LT1 Join Date: Apr 2010 Location: Paris, TN Posts: 3,139 View My Garage	And what will we say if we find out the 455 HP was 6HP more than the non-NPP at 449 HP?...lol. I'm waiting for someone to DYNO the car with and without the NPP open to give us a definitive answer to this question. It's going to continue confounding Camar6 posters until we know...lol. __________________ The new ride: 2023 Camaro, LT1, Sharkskin Grey Previous Performance Cars: 1966 Chevelle SS 4M, 2010 Corvette 6M 1968 Dodge Charger R/T Auto 2012 1SS 6M 1982 Corvette Auto 2010 1SS 6A 1984 Corvette Auto 2016 2SS 8A 1999 Camaro Auto 2017 HBM 1SS 1le 2002 C5 Corvette 6M 2018 2SS 2006 Corvette Auto 2023 Camaro LT1

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