Open headers...
I know video is a poor representation of the real thing, but here is a friend's 98 Z28 with open headers. Didn't ever drive it that way. (Too much of a PITA to take it off and put it back up on the Jack Stands.) Its ******' loud.
http://youtube.com/watch?v=46pkvbenaQo
http://youtube.com/watch?v=46pkvbenaQo
If they are half-way to you, these will be like cranking it up to ELEVEN! haha...Open headers are LOUD as ****, some of my friends have ran their trucks like that before while in the middle of doing exhaust. You could hear them easily 2-3 miles away, it's racecar loud. I wouldn't do it if I were you, chances are VERY good that you will get pulled over, and there is no keeping open headers quiet if you do somehow see the cop before he hears you.
12 Second Club
Joined: May 2009
Posts: 184
Likes: 1
From: paintsville ky
Ive researched the backpressure myth and the postive effects of exhaust scavenging and so forth, my car is a show and track car only so when (or if) i run it open headers its only going to be at the track. Ive had the car tuned by bluecat with LT headers no cats offroad 3in y-pipe and loudmouth bullit2 exhaust so it has very little resistance through the exhaust but just for fun and maybe saving 10 lbs of weight id like to run it at the track open headers. Bluecat tuned the 02 sensors out there are NONE in the exhaust so with that being said...do you guys think it would hurt or help or make no diffrence if i ran open headers at the track ONLY? no 02's to worry about and i also know if u unhook the battery for about 15min when u hook it back up the computer relearns how to idle, run wot ext...so im guessing i could just do that and it would adapt to the open headers and then when im ready to put the exhuast back on unhook the battery again and let it reboot with the exhaust back on. what do u guys think?
And it also sounds like he has shitty exhaust of it was costing him 3/10s.
Ive researched the backpressure myth and the postive effects of exhaust scavenging and so forth, my car is a show and track car only so when (or if) i run it open headers its only going to be at the track. Ive had the car tuned by bluecat with LT headers no cats offroad 3in y-pipe and loudmouth bullit2 exhaust so it has very little resistance through the exhaust but just for fun and maybe saving 10 lbs of weight id like to run it at the track open headers. Bluecat tuned the 02 sensors out there are NONE in the exhaust so with that being said...do you guys think it would hurt or help or make no diffrence if i ran open headers at the track ONLY? no 02's to worry about and i also know if u unhook the battery for about 15min when u hook it back up the computer relearns how to idle, run wot ext...so im guessing i could just do that and it would adapt to the open headers and then when im ready to put the exhuast back on unhook the battery again and let it reboot with the exhaust back on. what do u guys think?
On a different note... you have no O2 Sensors in your exhaust? I know the Rears are expendable, but I believe LSx Cars need the Front O2's in order for the PCM to properly gauge Air/Fuel Mixture and monitor Air/Fuel Ratio. I have no Real World experience with tuning or running with the Fronts removed, but every thread I've read on the subject says, Tuned out or not, not having the Front O2's in place has the potential to damage your engine.
TECH Apprentice
Joined: Feb 2011
Posts: 322
Likes: 0
From: Bentonville, AR
Yeah you gotta at least start it up for a while... I put 18" long pipes and turndowns on mine for 2 days. I loved it, it wasn't any louder than an open ORY pipe cruising easy around town or at idle, and it sounded much better. They are not as loud as drag cars at the track. Bigger cams make a huge difference and with our stock cams it's not near as loud as that. But it will put a smile on your face to hear it idle for a little while.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0
Brett Foote
10 Reasons the LS7 Is GM's Most Extreme Naturally Aspirated V8 Engine Ever
Verdad Gallardo 12 Second Club
Joined: May 2009
Posts: 184
Likes: 1
From: paintsville ky
Many have run with Open Headers in the past. I don't see how with the limited amount you drive your car (Show & Track) running it this way would do any permanent damage.
On a different note... you have no O2 Sensors in your exhaust? I know the Rears are expendable, but I believe LSx Cars need the Front O2's in order for the PCM to properly gauge Air/Fuel Mixture and monitor Air/Fuel Ratio. I have no Real World experience with tuning or running with the Fronts removed, but every thread I've read on the subject says, Tuned out or not, not having the Front O2's in place has the potential to damage your engine.
On a different note... you have no O2 Sensors in your exhaust? I know the Rears are expendable, but I believe LSx Cars need the Front O2's in order for the PCM to properly gauge Air/Fuel Mixture and monitor Air/Fuel Ratio. I have no Real World experience with tuning or running with the Fronts removed, but every thread I've read on the subject says, Tuned out or not, not having the Front O2's in place has the potential to damage your engine.
TECH Fanatic
Joined: Jan 2012
Posts: 1,076
Likes: 0
After I installed mine i went for a drive with them on a back road. I could tell it was a bit faster. On the first start up it will be "retarded".... It will have a low idle for about 5-10sec and sounds like you have a big cam even though you don't.... I wouldn't run them very long because how the exhaust comes out and hits the floor board. When your at a stop the hot exhaust fumes will go under the hood... Yes you can start it and give it a little ride but don't be driving in a busy street or for more than a few days.
i ran my like open headers like 2 months , only 2 ft dump extensions to be safe on the O2 i guess ,,, that was freaking LOUD!! but it gets annoying
lucky it was not my DD because on WOT EVERYONE on the little street of my country was turning their heads to see what was coming ..... or taking cover. lol
lucky it was not my DD because on WOT EVERYONE on the little street of my country was turning their heads to see what was coming ..... or taking cover. lol
12 Second Club
Joined: May 2009
Posts: 184
Likes: 1
From: paintsville ky
im most def not going to run o/h on the street i paid way too much for my full SLP exhaust to do that lol. but i was just wondering if it would hurt my 1/4 mile time any? i figured with the dropped weight and slightly less back pressure i might gain maybe 1mph or .05
You are def gonna need o2 sensors. If your on a stock tune your car is not going to run correctly at all. If there were no provisions in your headers (im not sure why this is) you are going to have to make some. What kind of headers did you get?
12 Second Club
Joined: May 2009
Posts: 184
Likes: 1
From: paintsville ky
You are def gonna need o2 sensors. If your on a stock tune your car is not going to run correctly at all. If there were no provisions in your headers (im not sure why this is) you are going to have to make some. What kind of headers did you get?[/QUOTE]
no i have a tune from Bluecat, there pacesetter LTs. yea there are no O2's which means he has put a WOT tune on it and i noticed that when we was driving and he was tuning it, he set the A/F at a constant 14.5 to 14
no i have a tune from Bluecat, there pacesetter LTs. yea there are no O2's which means he has put a WOT tune on it and i noticed that when we was driving and he was tuning it, he set the A/F at a constant 14.5 to 14
12 Second Club
Joined: May 2009
Posts: 184
Likes: 1
From: paintsville ky
12 Second Club
Joined: May 2009
Posts: 184
Likes: 1
From: paintsville ky
http://www.veryuseful.com/mustang/te...Scavenging.pdf
here you go guys, this is one of the links i was reading up on. hope this helps
here you go guys, this is one of the links i was reading up on. hope this helps