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Dec 4, 2007 | 10:53 PM

94BlackSSClone

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From: Birmingham, Alabama

open headers?

would running open headers on my car for a few months be bad on anything? Or is there any way I would lose power and torque because of no backpressure?

Dec 4, 2007 | 10:58 PM

GreenBlood

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From: Schiller Park (NW burb of Chicago)

It will most likely fry the O2s, and your going to lose some low end torque, not because of backpressure but because of lack of exhaust scavenging.

Dec 4, 2007 | 10:59 PM

CRAZZ28

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you will lose low end. and probably eat up your O2 sensors.

Dec 4, 2007 | 11:01 PM

Dave J

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Quote:

Originally Posted by CRAZZ28

you will lose low end. and probably eat up your O2 sensors.

yes what he said

Dec 4, 2007 | 11:26 PM

projekt70chevelle

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I've run open headers twice, after install and when i took the y pipe off when putting on the cut-out. Both times i drove for a few weeks. O2's were fine, and yeah you loose a little low end but get some more up top. Gives you a headache the first two days but you get used to it lol. Just gotta watch out for the po po...

Dec 4, 2007 | 11:41 PM

Gun5

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From: Tomball (H-Town), TX

Quote:

Originally Posted by projekt70chevelle

ya like he said u cant even idle next to the police if u have a stall or like to slip the clutch alot forget it ur already screwed its not to hard to see open headers either

Dec 5, 2007 | 09:45 AM

Red96TA

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From: Bryant/Fayetteville, Arkansas

My last car had open headers for like a year and a half (Not mine anymore though)

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Dec 5, 2007 | 11:31 AM

LT1Falcon

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i dont understand y it would effect the o2's

Dec 5, 2007 | 12:43 PM

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transamws6_97

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Quote:

Originally Posted by Bad_tx_Z28

that doesnt make sense because no matter how long your exhaust is cold air will creep back up to the motor

Dec 5, 2007 | 01:51 PM

#11

LT1Falcon

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Quote:

Originally Posted by transamws6_97

that doesnt make sense because no matter how long your exhaust is cold air will creep back up to the motor

i think he means it will creep in there a lot quicker, which wouldnt give the heads time to cool off on their own. not saying hes right but i see what hes saying

Dec 5, 2007 | 02:05 PM

#12

The Engineer

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From: Moore Oklahoma

I run dual-open collectors on my car and also have 18" collector extensions. So, I've got the best of both worlds, low-end torque and no high RPM restriction.

WD

Dec 5, 2007 | 02:22 PM

#13

Formula96

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run 6-8in extensions and you should be fine, and yes, the cold air can crack valves

Dec 5, 2007 | 02:32 PM

#14

LT1Falcon

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Quote:

Originally Posted by LT1Falcon

i dont understand y it would effect the o2's

bump for this question

Dec 5, 2007 | 02:52 PM

#15

Formula96

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From: Longview, TX

exaust gas cannot push air out fast enough at idle to keep fresh air from getting on the o2s, causing the car to put more fuel than is needed. I don't know why it would burn them up though.

Dec 5, 2007 | 02:56 PM

#16

Bad_tx_Z28

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Quote:

Originally Posted by transamws6_97

that doesnt make sense because no matter how long your exhaust is cold air will creep back up to the motor

okay...lets say that you just shut off you car...open yeaders, and it 40 degrees outside...cold air immediatley comes up through the headers and into the cylinders...over time it COULD crack valves...doesnt always happen.

Dec 5, 2007 | 03:01 PM

#17

LT1Falcon

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Quote:

Originally Posted by Formula96

exaust gas cannot push air out fast enough at idle to keep fresh air from getting on the o2s, causing the car to put more fuel than is needed. I don't know why it would burn them up though.

i agree with you on that. and i dont think it could "burn up" the o2's, theres no theory behind it

Dec 5, 2007 | 03:38 PM

#18

The Engineer

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Quote:

Originally Posted by LT1Falcon

i agree with you on that. and i dont think it could "burn up" the o2's, theres no theory behind it

I don't think it is an issue of "burning-up" O2s with open-collectors, but that they may not perform "as designed" in an open exhaust system (during closed loop). With the newer design EFI systems there is an O2 in front and one behind each Cat with a closed exhaust system. You open the exhaust system up and everything changes.

Leaded race gas is one thing that will damage the O2s.

WD

Dec 5, 2007 | 04:17 PM

#19

Formula96

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so will coolant and oil....

Dec 5, 2007 | 04:29 PM

#20

endobong

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Ive wondered, Yall ever think about getting a pair of Ecutouts and hooking them upto a rpm activation switch? Maybe set it up at 3200???? I believe the new Z06 has something like this...