RE: Backpressure: The Myth and Why It's Wrong.

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RE: Backpressure: The Myth and Why It's Wrong.

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Honda Civic Forum >> Your Ride >> Header, Intake, & Exhaust >> RE: Backpressure: The Myth and Why It's Wrong.

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RE: Backpressure: The Myth and Why It's Wrong. - 2/14/2005 8:58:47 PM

Kappa22

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Yeah, Cali is the only state who's trying to save theirs, since it's already so hot down there

. Everyone else is like, "Well, we already ****ed ours up. Why bother anymore?"

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Post #: 21

RE: Backpressure: The Myth and Why It's Wrong. - 3/10/2005 5:22:35 PM

rico892002

Posts: 74
Joined: 11/5/2004
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so what are u saying sacicons it is good just to cut your stock muffler off and just weld a performance muffler on because that is what i did but i was going to go to a muffler shop this summer and get a costom 2.5 cat-back i really did not know back then

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Post #: 22

RE: Backpressure: The Myth and Why It's Wrong. - 3/10/2005 9:10:52 PM

sacicons

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no, its ideal to get mandrel bent piping in an appropriate size for your application, with a low restriction muffler. stock piping is "crush bent" and doesnt maintain its inside diameter through the bends, which can cause quite a bit of backpressure. so get the custom cat-back, but dont go over 2.5 inch. 2.25 would be a little better though.

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Post #: 23

RE: Backpressure: The Myth and Why It's Wrong. - 4/21/2005 4:11:57 PM

uk civhead

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Hi, what bad things happen when you use a de-cat pipe instead of high flow cat? I know it will fail the emissions test but i can get round that. you see I was looking for some power gains from my 1.6 vtec using a megan de-cat pipe as high flow ones can be pretty expensive over here.

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Post #: 24

RE: Backpressure: The Myth and Why It's Wrong. - 4/21/2005 10:31:05 PM

LEVIII

Posts: 2501
Joined: 4/18/2005
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megan makes civic parts? Hmmm I never knew that before today.

Anyway, for emissions Im just gonna get a new car before I have to smog again. Just not worth swapping it all back to stock

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Post #: 25

RE: Backpressure: The Myth and Why It's Wrong. - 4/27/2005 4:16:05 AM

Cappelle

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haha there is no emision anything where i am (canada/saskatchewan) so i could burn oil instead of gas if that worked and blow smoke like there is no tommorrow.. haha

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Post #: 26

RE: Backpressure: The Myth and Why It's Wrong. - 5/4/2005 11:56:15 AM

Forty04

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quote:

megan makes civic parts? Hmmm I never knew that before today.

Hell yeah they do. I got the Drift Spec cat-back exaust on its way to my house right now. And i already installed their full set of strut bars.

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Post #: 27

RE: Backpressure: The Myth and Why It's Wrong. - 6/4/2005 4:35:10 PM

elfreaky70363

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Joined: 5/14/2005
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quote:

ORIGINAL: sacicons

no, its ideal to get mandrel bent piping in an appropriate size for your application, with a low restriction muffler. stock piping is "crush bent" and doesnt maintain its inside diameter through the bends, which can cause quite a bit of backpressure. so get the custom cat-back, but dont go over 2.5 inch. 2.25 would be a little better though.

damn sacicons you had me scared when i was reading all this. i was sure i had bought 3" piping. i went and found the ad for the pipe i bought tho, thankfully its 2.5 mandrel bent pipe. PHEW! i also bought the high flow cat, so i feel a lil better. not much to the cat. looks pretty much like the muffler does on the inside. you can see straight through it. anyways, thanks for the info, i always did wonder about backpressure, you hear so many rumors.....

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RE: Backpressure: The Myth and Why It's Wrong. - 6/5/2005 12:27:54 AM

LEVIII

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If you can see all the way through the cat I dont think its considered a cat anymore. a cat delete maybe.

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Post #: 29

RE: Backpressure: The Myth and Why It's Wrong. - 6/5/2005 7:10:43 AM

elfreaky70363

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Joined: 5/14/2005
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ya i was wondering about that. its weird. i was giving my friend the "i need backpressure lecture" because he wanted to eliminate my cat and go straight exhaust from the headers. so he counters what packpressure? look at this and picks up the cat and looks at me through it like a telescope. so i dont know what good its doing me, but i spent 70 bones on it, so dammit i am bolting it up. (yes i was giving the backpressure lecture before sacicons edumucated me on this thread)

< Message edited by elfreaky70363 -- 6/5/2005 7:11:59 AM >

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Post #: 30