c6 open headers?
Thread Starter
Pro
Joined: Sep 2010
Posts: 535
Likes: 10
From: Fort Worth TX
I watched this (at the end) and it sounds really really great.
http://www.youtube.com/watch?v=Q2oqV...eature=related
Is that what everyone is saying sounds horrible and obnoxious?
Would I need to jack up the front or the back to clamp on the turndown pipes and how much room do I need under the car to take off the midpipe?
http://www.youtube.com/watch?v=Q2oqV...eature=related
Is that what everyone is saying sounds horrible and obnoxious?
Would I need to jack up the front or the back to clamp on the turndown pipes and how much room do I need under the car to take off the midpipe?
Racer
Joined: May 2010
Posts: 499
Likes: 5
From: Bensalem PA
Here are two videos of my car running open flowtubes one is in my driveway idling and the other is at the track.
http://www.youtube.com/watch?v=9F3mjoZ7dWk
http://www.youtube.com/watch?v=WzLXmtHAZ8Q
http://www.youtube.com/watch?v=9F3mjoZ7dWk
http://www.youtube.com/watch?v=WzLXmtHAZ8Q
Thread Starter
Pro
Joined: Sep 2010
Posts: 535
Likes: 10
From: Fort Worth TX
Here are two videos of my car running open flowtubes one is in my driveway idling and the other is at the track.
http://www.youtube.com/watch?v=9F3mjoZ7dWk
http://www.youtube.com/watch?v=WzLXmtHAZ8Q
http://www.youtube.com/watch?v=9F3mjoZ7dWk
http://www.youtube.com/watch?v=WzLXmtHAZ8Q
I love the volume level of the Harley's with exhaust when they do runs down the street... if I could get close to that with open headers I would be happy.
I'm also concerned about the smell though - to anyone who has run open headers or turndowns any issues with smell? Would putting the cutouts/turndowns after the hi flow cats eliminate this?
Race Director
Joined: Mar 2007
Posts: 11,331
Likes: 18
From: Missouri City Texas
If you still have cats on the car you shouldn't have any smell, but your level of volume will be greatly diminished using stock cats and stock manifolds. MUCH quieter than a true open longtube header.
Tech Contributor
Joined: Jul 2002
Posts: 14,949
Likes: 263
From: St. Louis, MO
St. Jude Donor '08
Whether cutouts are open or closed, you don't smell it in the car.
Race Director
Joined: Mar 2007
Posts: 11,331
Likes: 18
From: Missouri City Texas
Strange. My car has no cats and has no noticeable smell behind it. Confirmed by several others to be sure my nose isn't just off, lol.
Your cutouts are pretty far back, I thought...so I wouldn't expect any interior difference, but the OP is talking about running open headers, which would be dumping the exhaust right under the driver.
Your cutouts are pretty far back, I thought...so I wouldn't expect any interior difference, but the OP is talking about running open headers, which would be dumping the exhaust right under the driver.
Tech Contributor
Joined: Jul 2002
Posts: 14,949
Likes: 263
From: St. Louis, MO
St. Jude Donor '08
My friend had a set of headers and we were having fits, all of a sudden, getting it to tune at idle. It was going full rich at idle, and running perfectly at part throttle and WOT. We thought intake leak, bad maf, all sorts of things.
Finally, turned out he had a cracked header collector and at idle, air was bleeding back into the o2 sensor, causing it to read super lean, and flooding the engine with gas (and setting a SES as the engine can only do 25% rich then it lights the SES). During part throttle or WOT the exhaust gases were flowing enough to keep the air going out, not coming back in.
You might have the same problem with your plan of opening headers depending how close your primary 02 sensor is to the open air.
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Tech Contributor
Joined: Jul 2002
Posts: 14,949
Likes: 263
From: St. Louis, MO
St. Jude Donor '08
Once you hear how bad it sounds you'll have it back on in no time!
You need some sort of turndown. The sound blatting off the pavement has a distinctive sound. Some, like me, like it. Some hate it. My buddy thinks my car sounds like a UPS truck. The turndown gives that low super bass sound that I like but some hate.
open headers just sound like cr&p. Seriously, go to a drag strip and listen to some. Most racers even put on turndowns of some sort to make it sound a little better, but you'll find someone with open manifolds (really bad) or headers.
Racer
Joined: Feb 2008
Posts: 343
Likes: 1
It's not going to hurt anything....
Once you hear how bad it sounds you'll have it back on in no time!
You need some sort of turndown. The sound blatting off the pavement has a distinctive sound. Some, like me, like it. Some hate it. My buddy thinks my car sounds like a UPS truck. The turndown gives that low super bass sound that I like but some hate.
open headers just sound like cr&p. Seriously, go to a drag strip and listen to some. Most racers even put on turndowns of some sort to make it sound a little better, but you'll find someone with open manifolds (really bad) or headers.
Once you hear how bad it sounds you'll have it back on in no time!
You need some sort of turndown. The sound blatting off the pavement has a distinctive sound. Some, like me, like it. Some hate it. My buddy thinks my car sounds like a UPS truck. The turndown gives that low super bass sound that I like but some hate.
open headers just sound like cr&p. Seriously, go to a drag strip and listen to some. Most racers even put on turndowns of some sort to make it sound a little better, but you'll find someone with open manifolds (really bad) or headers.
Speedy
Joined: Mar 2007
Posts: 6,095
Likes: 924
From: Tn
2024 C8 of the Year Finalist - Modified
I love my cutouts, people think I'm stock until they're open. Sound difference is night and day. Closed I can close the windows and hear my passenger clearly, open my passenger can here me idling in they're car 50ft away. Much more aggressive than NPP or the Z06 system but also a little more time consuming for install
my setup:
long tubes, no cats, intake tune ~390rwhp
http://www.youtube.com/watch?v=xLkbfvARm50
+ cam and supercharger ~650rwhp
http://www.youtube.com/watch?v=Zlwg8PYOF1g
+2 step
http://www.youtube.com/watch?v=Bw9u8VVURck
my setup:
long tubes, no cats, intake tune ~390rwhp
http://www.youtube.com/watch?v=xLkbfvARm50
+ cam and supercharger ~650rwhp
http://www.youtube.com/watch?v=Zlwg8PYOF1g
+2 step
http://www.youtube.com/watch?v=Bw9u8VVURck
Thread Starter
Pro
Joined: Sep 2010
Posts: 535
Likes: 10
From: Fort Worth TX
What exactly is involved in removing the midpipe? I have the idea that I can jack the car up enough to get under it, unscrew some bolts and pull out a pipe and then clamp on turndowns. I have a feeling it's more than that though.
Speedy
Joined: Mar 2007
Posts: 6,095
Likes: 924
From: Tn
2024 C8 of the Year Finalist - Modified
get the mid pipe off the car, bring it to a muffler shop, show them my picture and have them weld on piping like I did and have them put a 3 bolt flange at the end of the added pipe
buy cutouts, I had a bad experience with race ready, they rattled after a week. I gave them to my friend for free and he threw them out after a month. I sent them back to RR a total of 4 times and they always rattle. I'm using DMH now and they're perfect.
When you put it all back together follow my mock up except I would rotate the cutouts 60degree so they sit between the transmission and frame.
I took my wires through the e-brake grommit and into the car.
Tech Contributor
Joined: Jul 2002
Posts: 14,949
Likes: 263
From: St. Louis, MO
St. Jude Donor '08
I had my cutouts put on with the exhaust on the car to make sure everything fit.
If you want to take the midpipe out and drive it you have to remove the mufflers too or they will fall off.
If you want to take the midpipe out and drive it you have to remove the mufflers too or they will fall off.
Burning Brakes
Joined: Apr 2009
Posts: 1,155
Likes: 0
From: Kansas City MO
OK, I will agree that open headers on an otherwise stock car does not sound good. Yes the UPS truck would sound better. Not sure I understand what you are thinking with removing the x-pipe and leaving the cat-back? so you would have open headers with turn down then a space and the your cat back just hanging in the back hooked to nothing???
I had open headers on another TA with a turndown. this ta had heads/cam/headers and at a stop like in traffic you will get the exhaust in your passenger compartment while sitting at a light. I did mine that way because it was a track only car.
I had open headers on another TA with a turndown. this ta had heads/cam/headers and at a stop like in traffic you will get the exhaust in your passenger compartment while sitting at a light. I did mine that way because it was a track only car.
