Is there downside to running straight headers? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

winterboy8 · 06-21-2016, 09:14 AM

I'm interested in keeping my NPP but adding NoWeeds for those times when I want to have a little fun. As the car is tuned for headers and intake, I'm not sure if there are any mechanical concerns should I add the NoWeeds and run it hard while they're open. There are a lot of smart people here I'm hoping might be able to help me understand what the consequences will be should I add them. Thanks in advance.

Olddudesrule · 06-21-2016, 09:41 AM

An obnoxiously loud car.....

LS1 Fun · 06-21-2016, 07:08 PM

Not sure what you consider a mechanical concern but the tune will be off, I would definitely have that adjusted. More airflow = more fuel.

winterboy8 · 06-22-2016, 05:53 AM

By mechanical I mean not like the first dude stated about it being loud. I wanted to reply "no $hit". So, I modified my post.

I'll just contact my tuner and ask him what his thoughts are and perhaps do some data recording for him once I get them on, assuming he says there are no issues.

Dega Man · 06-22-2016, 07:14 AM

There is less back pressure so you would possibly lose some low end to mid range horsepower and probably gain on the high-end.

winterboy8 · 06-22-2016, 09:21 AM

That's cool, I'm not really too worried about gaining or losing time/power. But more worried about damaging the engine. How much can the ECU adjust for less back pressure and easier flow? Will this cause a lean situation? Don't want that, rich is ok, I can buy more gas, haha.

Olddudesrule · 06-22-2016, 09:25 AM

Not to offend. Just my attempt at being obvious.....

winterboy8 · 06-22-2016, 09:49 AM

Quote:

Originally Posted by Olddudesrule

Not to offend. Just my attempt at being obvious.....

No worries here, and if someone were considering putting on a set of NoWeeds and didn't realize how loud they would be when open, then I guess they are the fool for not realizing it.

Reichler · 06-22-2016, 12:10 PM

Quote:

Originally Posted by Dega Man

There is less back pressure so you would possibly lose some low end to mid range horsepower and probably gain on the high-end.

One of the absolute worst myths out there that needs to stop being regurgitated. The only detrimental thing that can be done after the headers is utilizing a too restrictive catback.

This "loss of back pressure" crap needs to go away as it's 100% complete bullshit.

mmarx82 · 06-22-2016, 01:35 PM

I've been running the PFADT Headers without cats and with Noweeds for years now with no issues. I still have the NPP on as well. Just have the ECU tuned for it. I won an exhaust contest on my first try with that setup. Will be about 112-113 decibels with cutouts open. I close the Noweeds when I go to the road courses because I setoff their meters.

winterboy8 · 06-22-2016, 01:42 PM

Quote:

Originally Posted by mmarx82

I've been running the PFADT Headers without cats and with Noweeds for years now with no issues. I still have the NPP on as well. Just have the ECU tuned for it. I won an exhaust contest on my first try with that setup. Will be about 112-113 decibels with cutouts open. I close the Noweeds when I go to the road courses because I setoff their meters.

So, you have a specific tune for when you run with your NoWeeds open? Was there a reason for this? Are you racing your car when they're open?

jayno20 · 06-22-2016, 05:34 PM

Quote:

Originally Posted by Reichler

One of the absolute worst myths out there that needs to stop being regurgitated. The only detrimental thing that can be done after the headers is utilizing a too restrictive catback.

This "loss of back pressure" crap needs to go away as it's 100% complete bullshit.

This.

I hear this all too often and how this ever got started is beyond me.

06-21-2016, 09:14 AM	#1
winterboy8 Drives: 2015 ZL1 Blue Velvet Metallic Join Date: Mar 2015 Location: Melbourne, FL Posts: 720 View My Garage	Is there downside to running straight headers? I'm interested in keeping my NPP but adding NoWeeds for those times when I want to have a little fun. As the car is tuned for headers and intake, I'm not sure if there are any mechanical concerns should I add the NoWeeds and run it hard while they're open. There are a lot of smart people here I'm hoping might be able to help me understand what the consequences will be should I add them. Thanks in advance. __________________ Roto-Fab CAI, ARH LT, SW 3" catback, JRE tune, Elite-2 CC, VMAX TB, Big Gulp, WW II relo, Lingenfelter S/C reservoir Last edited by winterboy8; 06-21-2016 at 09:51 AM.

06-21-2016, 09:41 AM	#2
Olddudesrule Resident nomad Drives: 2014 Summit White 1SS/1LE Join Date: Nov 2015 Location: Gilbert, AZ Posts: 1,765	An obnoxiously loud car..... __________________ Sold: 2007 Z06 2002 Viper GTS/ACR 2003 Z06 1965 FFR Cobra 2012 Nissan 370Z ADM LSA Stage II, Roto-Fab CAI, Kooks LTH/HFC's, Phastek CC, ported TB, Mishimoto radiator and oil cooler, BC Racing ER Series CO's, JPSS 32mm Black Magic rear bar, JPSS front inserts, R1 Concepts Premier slotted rotors/Goodrich SS lines, Schroth ASM harness, MGW flatstick, Brey-Krause HB, Tuned by NicD, at Cordes Performance Racing.

06-21-2016, 07:08 PM	#3
LS1 Fun Drives: 2013 ZL1 Join Date: Nov 2012 Location: CA, USA Posts: 128	Not sure what you consider a mechanical concern but the tune will be off, I would definitely have that adjusted. More airflow = more fuel. __________________ 1974 Cadillac Coupe DeVille 2002 Camaro Z28 A4 \| 10.80 @ 131 \| 383ci, D1SC, 4L80E, 9" 2013 Camaro ZL1 A6 \| 12.62 @ 113 \| Stock SOLD 2017 Lexus GS350F*

06-22-2016, 05:53 AM	#4
winterboy8 Drives: 2015 ZL1 Blue Velvet Metallic Join Date: Mar 2015 Location: Melbourne, FL Posts: 720 View My Garage	By mechanical I mean not like the first dude stated about it being loud. I wanted to reply "no $hit". So, I modified my post. I'll just contact my tuner and ask him what his thoughts are and perhaps do some data recording for him once I get them on, assuming he says there are no issues. __________________ Roto-Fab CAI, ARH LT, SW 3" catback, JRE tune, Elite-2 CC, VMAX TB, Big Gulp, WW II relo, Lingenfelter S/C reservoir

06-22-2016, 09:21 AM	#6
winterboy8 Drives: 2015 ZL1 Blue Velvet Metallic Join Date: Mar 2015 Location: Melbourne, FL Posts: 720 View My Garage	That's cool, I'm not really too worried about gaining or losing time/power. But more worried about damaging the engine. How much can the ECU adjust for less back pressure and easier flow? Will this cause a lean situation? Don't want that, rich is ok, I can buy more gas, haha. __________________ Roto-Fab CAI, ARH LT, SW 3" catback, JRE tune, Elite-2 CC, VMAX TB, Big Gulp, WW II relo, Lingenfelter S/C reservoir

06-22-2016, 07:14 AM	#5
Dega Man Drives: ZL1 Join Date: Oct 2012 Location: Talladega Posts: 631	There is less back pressure so you would possibly lose some low end to mid range horsepower and probably gain on the high-end.

06-22-2016, 09:25 AM	#7
Olddudesrule Resident nomad Drives: 2014 Summit White 1SS/1LE Join Date: Nov 2015 Location: Gilbert, AZ Posts: 1,765	Not to offend. Just my attempt at being obvious..... __________________ Sold: 2007 Z06 2002 Viper GTS/ACR 2003 Z06 1965 FFR Cobra 2012 Nissan 370Z ADM LSA Stage II, Roto-Fab CAI, Kooks LTH/HFC's, Phastek CC, ported TB, Mishimoto radiator and oil cooler, BC Racing ER Series CO's, JPSS 32mm Black Magic rear bar, JPSS front inserts, R1 Concepts Premier slotted rotors/Goodrich SS lines, Schroth ASM harness, MGW flatstick, Brey-Krause HB, Tuned by NicD, at Cordes Performance Racing.

06-22-2016, 01:35 PM	#10
mmarx82 Drives: '12 ZL1 #1609 Join Date: Feb 2010 Location: Georgia Posts: 1,762	I've been running the PFADT Headers without cats and with Noweeds for years now with no issues. I still have the NPP on as well. Just have the ECU tuned for it. I won an exhaust contest on my first try with that setup. Will be about 112-113 decibels with cutouts open. I close the Noweeds when I go to the road courses because I setoff their meters. __________________ Life is too short to drive cars that suck. My build Thread