Fuse 51 - Page 2

NightSkyCode · 08-26-2017, 10:13 AM

Quote:

Originally Posted by ninetres

100% sure.

Hmm.. Maybe his spring is stuck? Do you have a rod you can stick into the valve to release your springs?

KingLT1 · 08-26-2017, 03:25 PM

It made a big difference on mine by pulling it. Track mode, manual mode NPP does stay open longer, but it still closes cruising. Pulled the fuse and the exhaust ways stays open all the time and sounds throaty.

ninetres · 08-26-2017, 04:30 PM

Quote:

Originally Posted by NightSkyCode

Hmm.. Maybe his spring is stuck? Do you have a rod you can stick into the valve to release your springs?

Nothing was stuck. Valves were 100% open with fuse removed (visually verified), and the car sounded identical during all driving situations to when the fuse was installed.

I'm not the only one who feels this way. Several memebers have pulled their fuse and noticed no difference. I think you guys are hearing a placebo improvement lol.

CruzySS · 08-26-2017, 04:43 PM

There is a noticeable difference. Yea it sounds the same as in track mode with the valves open but the valves don't close making the car louder even under light acceleration.

JCunningham · 08-26-2017, 08:56 PM

build a mild 2 wild switch and you will notice a difference. But really it drones at cruise with the valves open. its nice to just be able to push a button. After a hour driving with the valves open i need to close them.

CT ZL1 · 04-26-2018, 12:55 PM

Quote:

Originally Posted by ninetres

Nothing was stuck. Valves were 100% open with fuse removed (visually verified), and the car sounded identical during all driving situations to when the fuse was installed.

I'm not the only one who feels this way. Several memebers have pulled their fuse and noticed no difference. I think you guys are hearing a placebo improvement lol.

I do not hear any difference when pulling fuse 51 as well> Sounds same

Rayfield · 04-26-2018, 01:42 PM

Quote:

Originally Posted by CruzySS

There is a noticeable difference. Yea it sounds the same as in track mode with the valves open but the valves don't close making the car louder even under light acceleration.

This echoes my experience. In Track mode, the valves would close again unless I was giving it a lot of gas. Now they don't..it's pretty obvious. Well worth it, love the way my NPP sounds now.

Soleil · 04-26-2018, 01:51 PM

Quote:

Originally Posted by ninetres

Nothing was stuck. Valves were 100% open with fuse removed (visually verified), and the car sounded identical during all driving situations to when the fuse was installed. ...... I think you guys are hearing a placebo improvement lol.

Or maybe you guys having hearing problems

just kidding.

There is a huge difference between pull fuse 51 and with 51 ask the cops

Rayfield · 04-26-2018, 02:15 PM

Quote:

Originally Posted by Soleil

Or maybe you guys having hearing problems

just kidding.

I actually do have measurable hearing loss..but I can tell the difference. It may also be more apparent when you're outside the car.

zx9rmal · 04-26-2018, 02:41 PM

FWIW, when I first pulled the fuse, many months ago, I thought there was no difference from track mode so I put it back. I recently pulled it again, and now I do believe there is a difference. Not significant, but it sounds better at cruising speed.

rap47 · 04-26-2018, 02:45 PM

There is a difference in my sound for sure.

.

LT4Greg · 04-26-2018, 03:49 PM

Made a difference in sound on my 2SS when I pulled the fuse. I set mine in Track mode and have kept it there.

ScottMZ3 · 04-27-2018, 01:14 AM

18 ZL1 here and I also noticed a fairly large difference after pulling the fuse. The exhaust isn’t louder than before...it’s just as loud but now more often. Like someone else mentioned, the big change I noticed is under light acceleration. Before pulling fuse even in track mode the valves would be closed under light acceleration. Now they are open all the time and the additional roar is definitely very apparent! Also I get more crackle and pops from exhaust while decelerating. Even my wife noticed the change! I’m very happy with it.

Another thing I noticed is that before the fuse pull I would see exhaust soot in all 4 tips (even in track mode)...with fuse pulled there is now zero soot in the inner pipes. So the effect is even visible!

red_johnny · 04-27-2018, 01:29 AM

I have not pulled the fuse but can tell the difference between the different modes. Maybe there is something else going on here for those who cant hear a difference? I have not pulled the fuse nor will I. I like the ability to stealth it. I have a A-hole neighbor who has a mustang and I swear he starts his up in a track mode on purpose every day. He has remote start so he lets it idle for about 10 mins, quite annoying.

08-26-2017, 03:25 PM	#16
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 7,641	It made a big difference on mine by pulling it. Track mode, manual mode NPP does stay open longer, but it still closes cruising. Pulled the fuse and the exhaust ways stays open all the time and sounds throaty. __________________ 2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel

08-26-2017, 08:56 PM	#19
JCunningham Drives: 2017 2SS M6 Join Date: Jun 2013 Location: WNY Posts: 7,069	build a mild 2 wild switch and you will notice a difference. But really it drones at cruise with the valves open. its nice to just be able to push a button. After a hour driving with the valves open i need to close them. __________________ real ZL1 wheels and brakes, 285/305 Michelin Pilot Super Sports, Pray ported Intake manifold, Soler Throttle Body, Rotofab intake, EFI Tuning Flex fuel kit, full American Racing Headers Exhaust, 1 7/8" w/ cats H pipe and mufflers. Full 1LE suspension, with BMR adjustable sway bars and links, GM aluminum cradle bushings, Hurst shifter with lighter reverse spring, TWM shifter knob, Tick level 1 transmission. I should have bought a ZL1

04-26-2018, 02:41 PM	#24
zx9rmal Drives: '20 ZL1 M6 Join Date: Apr 2017 Location: FT. Lauderdale, FL Posts: 731	FWIW, when I first pulled the fuse, many months ago, I thought there was no difference from track mode so I put it back. I recently pulled it again, and now I do believe there is a difference. Not significant, but it sounds better at cruising speed. __________________ Mal Ft. Lauderdale, FL '20 Camaro ZL1 M6 '22 Kawasaki ZX-14R

04-26-2018, 03:49 PM	#26
LT4Greg Drives: 2017 Camaro ZL1 Coupe Join Date: May 2016 Location: Georgia Posts: 5,872	Made a difference in sound on my 2SS when I pulled the fuse. I set mine in Track mode and have kept it there. __________________ ZL1 Coupe, PDR, Exposed carbon fiber hood insert, My Link with Nav, M6 6 speed and Silver Ice Metallic. Mods done: ceramic window tint, GM Accessories Camaro floor mats and Roto-Fab CAI.

04-27-2018, 01:14 AM	#27
ScottMZ3 Drives: 2018 ZL1 A10, 2019 BMW X5 Join Date: Dec 2016 Location: Roseville, CA Posts: 256	18 ZL1 here and I also noticed a fairly large difference after pulling the fuse. The exhaust isn’t louder than before...it’s just as loud but now more often. Like someone else mentioned, the big change I noticed is under light acceleration. Before pulling fuse even in track mode the valves would be closed under light acceleration. Now they are open all the time and the additional roar is definitely very apparent! Also I get more crackle and pops from exhaust while decelerating. Even my wife noticed the change! I’m very happy with it. Another thing I noticed is that before the fuse pull I would see exhaust soot in all 4 tips (even in track mode)...with fuse pulled there is now zero soot in the inner pipes. So the effect is even visible! __________________ 2018 Nightfall Gray Metallic Camaro ZL1 - A10 Purchased 9/23/2017

08-26-2017, 04:43 PM	#18
CruzySS Drives: 2016 Camaro 2ss Join Date: May 2017 Location: Annandale MN Posts: 588 View My Garage	There is a noticeable difference. Yea it sounds the same as in track mode with the valves open but the valves don't close making the car louder even under light acceleration.

04-26-2018, 02:45 PM	#25
rap47 Drives: 2017 Camaro SS 50th Join Date: Nov 2016 Location: Iowa Posts: 91	There is a difference in my sound for sure. .

04-27-2018, 01:29 AM	#28
red_johnny Drives: 2016 Gray 2SS M6 Join Date: Jun 2012 Location: Hermitage, PA Posts: 753 View My Garage	I have not pulled the fuse but can tell the difference between the different modes. Maybe there is something else going on here for those who cant hear a difference? I have not pulled the fuse nor will I. I like the ability to stealth it. I have a A-hole neighbor who has a mustang and I swear he starts his up in a track mode on purpose every day. He has remote start so he lets it idle for about 10 mins, quite annoying.

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