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Open Headers... good or bad?

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Old Oct 16, 2002 | 05:07 PM
  #1  
Sears's Avatar
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Default Re: Open Headers... good or bad?

You will lose a little low end with open headers and extensions. This graph compares my dyno with open headers vs. dual exhaust.

<img src="http://www.fryrice.com/images/dualdyno.jpg" alt=" - " />

Justin

<small>[ October 16, 2002, 05:09 PM: Message edited by: Jsears8 ]</small>
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Old Oct 16, 2002 | 07:53 PM
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Default Re: Open Headers... good or bad?

does anyone have an open header v. y-pipe dyno chart? also, justin did you change the programing at all when you switched to true duals?

was it worth it to go open header?
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Old Oct 16, 2002 | 11:37 PM
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Default Re: Open Headers... good or bad?

but the question is what were current mods? What cat-back? and also would it make more power with a cutout on the I pipe.
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Old Oct 17, 2002 | 12:12 AM
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Default Open Headers... good or bad?

Will I gain or lose power if I run open headers? This is kinda tied to the old backpressure question. I have always thought that all backpressure was bad and that "if" I lost low end torque I would make up for it with top end horsepower. Is this true? Thanks in advance.

Luke
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Old Oct 17, 2002 | 12:22 AM
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Default Re: Open Headers... good or bad?

From what I've been reading it is ok to run open headers if you have extensions off of the collectors. I believe that if you run directly off the collector you will lose power, but maybe someone else will know a little more about this.
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Old Oct 17, 2002 | 09:30 PM
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From: Louisiana
Default Re: Open Headers... good or bad?

Program stayed the same, air/fuel was pretty much on.

Current mods are Heads/Cam/Bolt ons/12bolt , only thing that was changed was the exhaust.

Justin
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Old Oct 18, 2002 | 02:12 PM
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Default Re: Open Headers... good or bad?

justin, do you by chance have a borla v. open header dyno?
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