runing straigh headers
11 Second Club
Joined: Feb 2003
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From: The South
Do it! Do it! Do it! Do it! Do it! Do it! Do it! Do it! Do it!
Do it! Do it! Do it! Do it! Do it! Do it! Do it! Do it! Do it!
Do it! Do it! Do it! Do it! Do it! Do it! Do it! Do it! Do it!
Do it! Do it! Do it! Do it! Do it! Do it! Do it! Do it! Do it!
Do it! Do it! Do it! Do it! Do it! Do it! Do it! Do it! Do it!
Just make sure you have O2 extensions so you can hook up the front O2's. There are frequently posts about running open header on the board, do a search on open header
It sounds SOOO badass and is CRAZY LOUD 
FWIW: I ran open header for over a MONTH waiting for my duals apointment 
Do it! Do it! Do it! Do it! Do it! Do it! Do it! Do it! Do it!
Do it! Do it! Do it! Do it! Do it! Do it! Do it! Do it! Do it!
Do it! Do it! Do it! Do it! Do it! Do it! Do it! Do it! Do it!
Do it! Do it! Do it! Do it! Do it! Do it! Do it! Do it! Do it!
Just make sure you have O2 extensions so you can hook up the front O2's. There are frequently posts about running open header on the board, do a search on open header
It sounds SOOO badass and is CRAZY LOUD FWIW: I ran open header for over a MONTH waiting for my duals apointment 
Staging Lane
Joined: Mar 2004
Posts: 74
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From: Corpus Christi / College Station, TX
Hahahahahaa, I have the same delima - either I drive to a lift and then drive back to weld up the y-pipe or I ghetto rig some system of weights, pullies, jackstands, and 2x4's to pick my car 3 feet off the ground to clear the headers. Either way, I am definitely cruisin the car with open headers(probably around 1 or 2 in the morning)
I have been running with my cutouts open off an on for about half the summer (keep them open for a week or 2 then close them for a week or two) with no problems. I have had them open for about the last month straight. I like it but others may disagree...definitely makes the car sound intimidating sitting there loping at a stoplight with open headers
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I ran open headers for a month waiting on my y-pipe.
You cab do it, but it's crazy loud. Especially with a cam! But the car runs like ***. It will draw vaccum when you let off the gas and suck fresh air up the headers a little way. Your 02's can read this causing a lean condition in the eyes of the computer. It will in turn add fuel and boom. Backfiring like a sumofabitch.
My car ran WAY faster and smoother once the exhaust was hooked up.
You cab do it, but it's crazy loud. Especially with a cam! But the car runs like ***. It will draw vaccum when you let off the gas and suck fresh air up the headers a little way. Your 02's can read this causing a lean condition in the eyes of the computer. It will in turn add fuel and boom. Backfiring like a sumofabitch.
My car ran WAY faster and smoother once the exhaust was hooked up.
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Dont do it with your o2's hooked up. They are at the end of the collector and fresh air can contaminate the readings causing the computer to continually add fuel +25 ltrims. Fuel mileage goes to hell, eyes start burning, stuttering and not to mention under prolonged periods you MAY wash your cylinder walls down causing you to have to get your rings rebuilt.
11 Second Club
Joined: Feb 2003
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From: The South
Originally Posted by HumpinSS
Dont do it with your o2's hooked up. They are at the end of the collector and fresh air can contaminate the readings causing the computer to continually add fuel +25 ltrims. Fuel mileage goes to hell, eyes start burning, stuttering and not to mention under prolonged periods you MAY wash your cylinder walls down causing you to have to get your rings rebuilt.
Yes, the fuel mileage is bad, no your eyes don't typically start burning, no typical stuttering.....I have read many threads about open header and never has anyone said anything like this 
. Sure it runs pig rich but it doesn't hurt anything. Did you have a bad experience or what?
Originally Posted by blkZ28spt
What the hell are you telling him?! You make it sound as if he should do it without his O2's hooked up! Yes, the fuel mileage is bad, no your eyes don't typically start burning, no typical stuttering.....I have read many threads about open header and never has anyone said anything like this . Sure it runs pig rich but it doesn't hurt anything. Did you have a bad experience or what?
Yes, the fuel mileage is bad, no your eyes don't typically start burning, no typical stuttering.....I have read many threads about open header and never has anyone said anything like this . Sure it runs pig rich but it doesn't hurt anything. Did you have a bad experience or what?The o2 sensors are too close to the edge of the collector. Air will contaminate the readings. Do you even know how the o2 sensor works and the effects it has on the car when they are contaminated with FRESH air. At idle your injector pulse widths will be 10 ms this is 40% dutycycle you do the math
Originally Posted by Derek98z
It will draw vaccum when you let off the gas and suck fresh air up the headers a little way. Your 02's can read this causing a lean condition in the eyes of the computer. It will in turn add fuel and boom. Backfiring like a sumofabitch.
My car ran WAY faster and smoother once the exhaust was hooked up.
My car ran WAY faster and smoother once the exhaust was hooked up.
This says the same thing it just doesnt go into too much detail
https://ls1tech.com/forums/pcm-diagnostics-tuning/203355-open-headers-o2.html
here is something to wet the whistle of you who tink open headers are cool
here is something to wet the whistle of you who tink open headers are cool
11 Second Club
Joined: Feb 2003
Posts: 5,524
Likes: 1
From: The South
Originally Posted by HumpinSS
https://ls1tech.com/forums/showthread.php?t=203355
here is something to wet the whistle of you who tink open headers are cool
here is something to wet the whistle of you who tink open headers are cool
I said right off the bat that it would run pig rich. I still fail to see why it shouldn't be done. And I ABSOLUTEY DO NOT think that you should EVER run without the front 02's hooked up!!! Can a third (and possibly fourth, etc) party reading this post anything concrete on this please?
Last edited by blkZ28spt; Aug 18, 2004 at 04:08 AM.
If you run without the fron o2 the car will run in open loop and off the open loop fuel air tables. The same tables the car uses when you crank it up in the morning until it warms up. There are plenty of people running around with no front 02's BUT they have a wideband in place. Either way this isnt a smart idea whether you have the 02's or not.......
On The Tree
Joined: Feb 2004
Posts: 185
Likes: 0
From: Atlanta
Your neighbors will hate you. I finished my header install around 12 midnight on a Tuesday and fired her up. My neighbors were in my garage within 20 minutes in their night wear. Whatever you do, get O2 extensions so you dont **** up your ECU.
DO IT!!! 
I would not reccomend open headers, without some sort of extension on the end of the collector. As stated before, fresh air will enter the collector and car foul out the O2 sesnors which are not cheap to replace. Some people havent had any problems, but it's just a precaution.
