Notices
Honda Civic / Del Sol (1992 - 2000) EG/EH/EJ/EK/EM1 Discussion

Catback 2.25" or 2.5"

Thread Tools
 
Search this Thread
 
Old 09-09-2004, 09:45 AM
  #1  
Honda-Tech Member
Thread Starter
 
EM2Civic's Avatar
 
Join Date: Sep 2003
Location: CA, Canada
Posts: 1,506
Likes: 0
Received 0 Likes on 0 Posts
Default Catback 2.25" or 2.5"

I have en EG with a JDM b18c should I run a 2.25" catback or should I run 2.5" it's gonna be custom piping to a magnaflow es oval. Also if I buy the 2.5" inlet, 2.5" outlet would it be hard to weld 2.25" piping to the es oval exhaust?
Old 09-09-2004, 09:46 AM
  #2  
Honda-Tech Member
 
Spade's Avatar
 
Join Date: Aug 2001
Location: Redwood City, Ca
Posts: 15,369
Likes: 0
Received 3 Likes on 2 Posts
Default Re: Catback 2.25" or 2.5" (EM2Civic)

2.5"

<--had a 126whp stock Y8 with 2.5 and others had a cam and tuning with 2 and 2.25 with less power.
Old 09-09-2004, 10:07 AM
  #3  
Honda-Tech Member
 
Luserkid's Avatar
 
Join Date: Oct 2002
Location: Cali
Posts: 12,653
Likes: 0
Received 6 Likes on 6 Posts
Default Re: Catback 2.25" or 2.5" (Spade)

Why would you want to run a 2.25 pipe to the muffler? What is the inlet of the muffler? Dont go to bigger then the muffler because it will restict you at the end.

I had 2.25 on mine when it was NA and it felt just right. But if your going to build or turbo then go bigger. 2.5 is good.
Old 09-09-2004, 10:13 AM
  #4  
Honda-Tech Member
 
siblueg's Avatar
 
Join Date: Aug 2004
Location: Texas
Posts: 1,917
Likes: 0
Received 1 Like on 1 Post
Default Re: Catback 2.25" or 2.5" (Luserkid)

2.5
Old 09-09-2004, 10:16 AM
  #5  
 
jspresso's Avatar
 
Join Date: May 2004
Location: new bedford, ma, usa
Posts: 255
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Catback 2.25" or 2.5" (EM2Civic)

hmmm does girls like 2in dicks or 7in ones, nah if you want top end power go skinnier , if you want bottom end get the 2.5
Old 09-09-2004, 10:19 AM
  #6  
Member
 
Revolver's Avatar
 
Join Date: Dec 2003
Location: Orlando FL, USA
Posts: 1,392
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Catback 2.25" or 2.5" (jspresso)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jspresso &raquo;</TD></TR><TR><TD CLASS="quote">hmmm does girls like 2in dicks or 7in ones, nah if you want top end power go skinnier , if you want bottom end get the 2.5</TD></TR></TABLE>

What?
Old 09-09-2004, 10:19 AM
  #7  
eL
Honda-Tech Member
 
eL's Avatar
 
Join Date: May 2003
Posts: 7,773
Likes: 0
Received 4 Likes on 4 Posts
Default Re: Catback 2.25" or 2.5" (jspresso)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jspresso &raquo;</TD></TR><TR><TD CLASS="quote">nah if you want top end power go skinnier , if you want bottom end get the 2.5</TD></TR></TABLE>

are you serious?

Correct me if I'm wrong but I believe its the opposite.
Old 09-09-2004, 10:20 AM
  #8  
Honda-Tech Member
 
Spade's Avatar
 
Join Date: Aug 2001
Location: Redwood City, Ca
Posts: 15,369
Likes: 0
Received 3 Likes on 2 Posts
Default Re: Catback 2.25" or 2.5" (jspresso)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jspresso &raquo;</TD></TR><TR><TD CLASS="quote">if you want top end power go skinnier , if you want bottom end get the 2.5</TD></TR></TABLE>

What the hell are you talking about!?! Do you know anything about thermal dynamics?

Look guys, it's simple hot air is expanded as it cools it contracts, that's why VW owners use 3" downpipes and 2.5" cat-backs. The exhaust cools enough to fit properly.

Either way, you cannot go wrong with a 2.5" exhaust, boosted or N/A.
The only thing you do with a 2.25 is limit yourself in both HP and in future options.
Old 09-09-2004, 10:23 AM
  #9  
Honda-Tech Member
 
ej1 pilot's Avatar
 
Join Date: Jan 2004
Location: MD, USA
Posts: 1,904
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Catback 2.25" or 2.5" (EM2Civic)

https://honda-tech.com/zerothread?id=952491

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDM EK9 &raquo;</TD></TR><TR><TD CLASS="quote">2.5 NA or boosted.

Spade proved this to me with his dyno numbers. 126whp with intake, header, exhuast, intake manifold</TD></TR></TABLE>
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
91crxturbo
Forced Induction
10
05-13-2007 06:32 PM
92integraVTECgsr
All Motor / Naturally Aspirated
3
02-19-2006 07:02 PM
EGPHANTOM
Honda Civic / Del Sol (1992 - 2000)
5
11-16-2004 07:54 AM
bbk813
Acura Integra
7
04-04-2004 08:32 PM
pbizzlegsr
Acura Integra
1
03-10-2004 10:53 PM



Quick Reply: Catback 2.25" or 2.5"



All times are GMT -8. The time now is 06:58 PM.