exhaust question

[Digitalcivic]

Alright, I have a zc engine with a dc header. After installing the header i found that the DC header doesn't match up right with my OEM cat. It seems to be at a bind resulting in a huge exhaust leak. Hard to explain, anyone else have problems like this.


I plan on getting a new exhaust because my current pacesetter blows. I plan on getting an OBX bomb canister muffler and having an exhaust shop run it straight back to the cat with 2.25 inch piping.

Any comments/suggestions?


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[SiRWannabe]

Headers for the zc are a bit different that the headers for the stock civic engine. The headers you use are 4-2-1 two piece headers. FOr the top half, the part that bolts onto the engine, you use a 89 integra and a 88-91 civic lower piece. The reason, so you won't have to port match the headers and ports.

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[zc911]

Go find a Genie header, huge posrts that match up with the ZC, and probvably cheaper than DC

oh wait a minute thats not what you where asking

Anyway, get a custom exhasut done, cheaper and jus as good

wauit a miunte you already are going to do that, carry on then

i must be more tired than i thought, i think i should go to bed

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1991 Civic Si b16a with a b18c5 waiting for spring

[This message has been edited by zc911 (edited January 06, 2002).]

[This message has been edited by zc911 (edited January 06, 2002).]

[zc911]

i think for a ZC 2.25 is good.

2inch for stock si motor
but 2.25 for ZC b16
2.25 for a stock b18c 2.5 for a modded one
2.5 for any turbo 1.6

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1991 Civic Si b16a with a b18c5 waiting for spring

[91zc]

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by zc911:
i think for a ZC 2.25 is good.

2inch for stock si motor
but 2.25 for ZC b16
2.25 for a stock b18c 2.5 for a modded one
2.5 for any turbo 1.6

<HR></BLOCKQUOTE>

I had a 2.25 in catback on my zc sedan and it was a lot better than the pea shooter I had on before it. 2 in just might be a bit too small for the zc.



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1991 Civic 4dr
B16A
a bunch of other mods

[Kunundrum]

the "pea shooter" size is 1.25-1.5"

I guess it's personal preference... I personaly feel better running 2" with my ZC... but I'm gonna have to get 2.25 when I get my Turbo on.

Oh well no biggie...

it's just my .02$

K-drum

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*****
1990 Civic H/B *wrecked & being parted out*
*****
ZC Powered 90 CRX SI With Mods
I/H/C/E
+

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planned
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- Rims (15")
- Turbo

[Kunundrum]

Unless you are going to run Turbo Don't go 2.25". 2" is a perfect size for a NA engine. I made the mistake on the Civic of gettin 2.25" piping and I actualy lost power. On my CRX I put 2" and Wow what a difference.

Bigger piping does give better flow But if also reduces backpressure not having enough back pressure reduces torque.

A turbo restrics the flow to provide the engine with backpressure that it needs that's why bigger piping is found on turbo cars.

It's all about ballance.

K-Drum

------------------
*****
1990 Civic H/B *wrecked & being parted out*
*****
ZC Powered 90 CRX SI With Mods
I/H/C/E
+

-----------
planned
-----------
- Rims (15")
- Turbo