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View Full Version : 2 1/4" or 2 1/2" piping for the dc2 which is best



kraftycuts
18-12-2003, 07:20 PM
I got my JIC muffler installed and the work done was very dissapointing :x ... now seriously thinking about redoing the whole exhaust fitment with either a 2-1/2" or a 2 1/4" mandrel bent pipe for my dc2... just wondering which is better and where can i get it done ... i heard that liverpool exhaust is good but i dont have the address. does anybody have the address??? :?:

joneblaze
18-12-2003, 09:55 PM
hey Royce,
here:
http://www.liverpoolexhaust.com.au/
when i called Livo i spoke to a dude named Shev, try asking for him, he's really polite and sounds helpful.

i believe most here will suggest 2.25" piping for your VTiR...

btw, the JIC muffler sounds meaty.. lol


jon

jenova
18-12-2003, 10:29 PM
hey man, just get a full jdm cat back and u won't go wrong. forget about local custom made stuff and spend a little more to get everything right at the first time.

civicboy
18-12-2003, 10:37 PM
where can u get a full jdm cat. back?

fried
18-12-2003, 10:45 PM
royce! its eric! we talked about this mang! and u saw the proof on a certain vtir mang!

get 2.5 bro... and livo is fine mang! get a hiflow CAT with ur 2.5... and its all good...
leaves it open for getting headers later too!

but DEFINITELY, 2.25 is totally fine!.....

put it this way, if u prolly want headers later go 2.5, u cant go wrong....

otherwise 2.25 is fine too, cant go wrong! lol

mo
18-12-2003, 11:59 PM
2.5" i reckon!! i saw a certain beast (he's not on this forums) b18c1 (not in dc2)

b16a_integra
19-12-2003, 10:50 AM
2.25, go any bigger on NA and you might actually start losing power, what i was told anywayz, i got 2.25 with DRFT muffler.

dcii_sir
19-12-2003, 11:00 AM
Definately 2 1/4 mate.. I had a cat back HKS Hiper for DC2.. It was a bolt on kit.. Sounded mad..

Spunkymonkey
19-12-2003, 11:17 AM
I have 2 and 1/4 which is fine.

You can go 2.5 (ask slim)....

you may lose a little on the lower end, but gain a bit on higher end of rpm range.

booget
19-12-2003, 11:47 AM
more power go 2.5

my fren has dyno charts to prove it

he had 2.25 then changed to 2.5 n he got more power
on the dyno

A'PEXi
19-12-2003, 12:13 PM
2.250

Civic Type R
19-12-2003, 12:55 PM
checkout my thread in the civic section.
[Civic Type R goes on the dyno]

Then decide :)

Teggy-Vtir
19-12-2003, 04:25 PM
2.5 inch is good for the teg
im warnin u now, it'll b quite loud
but u get used to it

BlakTegra
19-12-2003, 08:38 PM
more power go 2.5

my fren has dyno charts to prove it

he had 2.25 then changed to 2.5 n he got more power
on the dyno

Was that with extractors as well?

booget
20-12-2003, 12:43 AM
yeh 4-2-1 header with 2.5 piping

now he got 4-1 installed , so waiting 4 dyno readings on that 2

dc2r
20-12-2003, 04:44 AM
If you're interested at all... the DC2 Type-R has 2.25" exhaust from the factory, and I heard that some parts actually might go into 2" although the majority of it is 2.25"

[[d a n n y]]
20-12-2003, 07:05 AM
hm..like son said i beleive 2.5" is the best for the teg.,.

Phorte
20-12-2003, 11:06 AM
to quote the integra info bible.. teamintegra



Most Integra owners have 1.8L engines with "bolt-ons only". You may want to look for a 2 1/4 in. diameter exhaust to start off with. If you begin to think about big lift-long duration cams, bigger 2.5 in. collector headers, headwork, or boring out to get 2 L displacement, then go up to the next levels in diameter as determined by your power goal.


2-1/4" up to 210HP @ the flywheel (about 180-185 whp)

2-3/8" (60mm) up to 235HP @ the flywheel (about 200-207 whp)

2-1/2" up to 265HP @ the flywheel (about 225-235 whp)


i'd recommend 2.25" straight through..

booget
20-12-2003, 11:47 AM
yeh phorte is right
if u wanna get heaps more power gains later
get 2.5


if u just gonna do bolt on mods 2.25 is enough 2

2.5 has extra 2 kw ova 2.25 from my frens dyno reading

depends on if ur gonna mod car more later down the track

snowman95
20-12-2003, 05:49 PM
gotta love team integra...

ginganggooly
20-12-2003, 05:51 PM
there's roughly 1/4 of a bees dick in it between the two- when talking cat backs and stock cat and header anyway.

Phorte
20-12-2003, 09:57 PM
thats right..

and i dunno what other ppl are saying about all these friggin power gains.. the power gain you'd get from a friggin header/exhaust upgrade on a n/a card is veryveryvery minimal..

ginganggooly
21-12-2003, 07:24 PM
the difference between 2.25" and 2.5" is extremely small. i couldn't feel it in terms of seat of the pants. however, the difference between 2.25" or 2.5" and stock is very noticable.

i'll have to take my car back to hill motorsport in pennant hills to give you a dyno chart, but others in the states are pulling ~10-15 whp depending on the exhaust system.

tofu R
21-12-2003, 08:34 PM
hehe its loud with 2.25 as well
haha

kraftycuts
21-12-2003, 10:11 PM
heyas thanks guys .... for the replies ... i've decided to go for the 2.5 mandrel bent cat back for my teg ... the whole package is a little to expensive :!: :!: :!: i'll start saving for the header for next years list of mods to do :D so we'll see what happens.

Yeah eric i remember ...

I got a quote for my the piping ... $1000 for 4 to 1 header, higflow cat, and mandrel bent pipe to my existing muffler.

or $350 for just the mandrel bent cat back to my existing muffler


hmmmm not sure which to go for ... quoted from fussy's of hume highway ... i think the catback sound more affordable. still waiting to get a quote from livo exhaust.

eknine
22-12-2003, 07:36 AM
FUSSY...mate you should ask tofu-r for the next best link in town...

Boost
22-12-2003, 10:25 AM
I got my exhuast done at liverpool exhuast, its a 2.1/4" cat back. It is quiet loud, i think if you get anything bigger the car will be very slugish, but you might get better power top end. I dunno, if you can tell the difference or not. But its loud.i dont think extractors will make much difference in the integ. But if you do get the whole set up i.e. extractors 4-1, high flow cat and 21/4" exhuast fitted let us know if there are any significant power gains. But if i was you i would skip liverpool and save up the bucks for the better stuff like fujitsubo ss around a grand i think.

fried
22-12-2003, 03:56 PM
kkekekeke...... waiting for boogets and ginggangoolys response to boosts reply..... dum di dum di dum :P

Boost
22-12-2003, 04:34 PM
freid: Why have these guys got this setup? or what?

ginganggooly
22-12-2003, 06:01 PM
imo, brand name cat backs are a waste of money (in terms of the price difference)... performance gains over a good custom system are nill.

headers are a different kettle of tuna though.

i feel i've had some very good gains out of my system, but i'd have to get my arse over to hills motorsport to get some figures to back up my inner-ear dyno.

i've got some charts comparing a 2.25" and 2.5" cat back (on my car) though... and a stock dc2r that was at the dyno with me.

kraftycuts
22-12-2003, 08:08 PM
fujistsubo ss <<< what the ??? not sure what that is man could you elaborate dude???

so 21/4" is better im assuming???

mo
22-12-2003, 08:30 PM
Fujistsubo - Is that even how you spell it?
Anyways it's an exhaust brand!

booget
22-12-2003, 09:29 PM
if its noise ur worried about dun get zorst dude!
put in resonators to make it quieter, it doesnt restrict airflow
but hondas special vtec's r fkn loud!

2.5 is better in future if ur gonna go serious, like cams n stuff
wanna race?

hehe ill show u wat headers n 2.5 can do
kekeke

mo
22-12-2003, 10:09 PM
Hahaha...go race kraftykuts son!! hahaha

dc2r
23-12-2003, 09:21 AM
"Fujitsubo" is how you spell the brand....
I think that getting a wider exhaust cat-back will just make the car louder in the end, unless you really work your engine. All these power figures and gains that people talk about.... And fair enough dynos might be fun and show you how much power you have, but performance doesn't depend only on dyno. So a V8 can have three times the power on dyno than a Type-R but that doesn't mean the V8 will beat a Type-R on track, or in a straight line for the matter. Just saying whp isn't everything :)
And like I said before, 2.25" is the stock DC2R exhaust diameter. Might want to think about that...

ginganggooly
23-12-2003, 10:33 AM
and jap spec dc2r are 60mm (2.36) in diameter. also something to think about ;)

dc2r
23-12-2003, 11:32 AM
there u go... just get a jdm dc2r exhaust and ur good...

Boost
23-12-2003, 04:17 PM
Stuff it all and leave it STOCKA BLOCK! hahahahah.
Its not the car but the driver... let me rephrase that... its both.

kraftycuts
23-12-2003, 07:23 PM
hehehehe... yeah i'll prolly go j-spec for my teg ... not really gonna do anything big anyways ... just make the car nice and neat and i'll be happy... but you know what i need now is some silicon hosing for my car red ones does anyone know where i can get them from ???

i've decided to go for the 60mm so i'm in between the two ... and i'm prolly getting it done at livo or fussy's. not sure yet.

Teggy-Vtir
23-12-2003, 10:03 PM
booget: which headers have u got?

stocky
24-12-2003, 12:08 AM
jdm 4-1

running 2.5 custom piping

dude, im saying performance wise as in power output from a 2.25 or a 2.5
2.5 will give u more power

but of course in terms of track n stuff its going to be diff!!

in terms of striaght line 2.5 will give u more power
bees dick thou, not much to notice

slim u nong post up ur dyno reading

stocky
24-12-2003, 12:09 AM
btw that was me booget, on me frens comp

BlakTegra
24-12-2003, 08:36 AM
I'm planning to keep my headers stock standard - therefore no major mods to engine in future.

So I gather from all post above, a 2.25" mandrel bent is my best bet, right guys?

PS. What's the orginal size of the exhuast on the integra vtir's? Is it mandrel bent? Thanks guys :)

ginganggooly
24-12-2003, 09:54 AM
2.25"
http://board.performanceforums.com/gallery/data/500/745mike-dyno1-med.jpg

2.5"
http://board.performanceforums.com/gallery/data/500/745mike-dyno2-med.jpg

and one for the type-r buffs.
http://board.performanceforums.com/gallery/data/500/745matty-dyno1-med.jpg

booget
24-12-2003, 01:19 PM
hehehe damn watelse u dun to ur car ginganggooly?

u got more power then a dc2r?
come on wat else do u have under there?

or isit just 2.5 full exhaust?

stocky
24-12-2003, 03:43 PM
rofl
looks like 2.5 it is

ginganggooly
24-12-2003, 05:27 PM
hehehe damn watelse u dun to ur car ginganggooly?

u got more power then a dc2r?
come on wat else do u have under there?

or isit just 2.5 full exhaust?


nah bro, didn't i tell you?? i got a vtec version 2.25 firmware upgrade. it allows for three stage vtec actuation.

Spunkymonkey
24-12-2003, 05:36 PM
hehehe damn watelse u dun to ur car ginganggooly?

u got more power then a dc2r?
come on wat else do u have under there?

or isit just 2.5 full exhaust?


nah bro, didn't i tell you?? i got a vtec version 2.25 firmware upgrade. it allows for three stage vtec actuation.

hahaha....you habib wannabe Mike :P

booget
24-12-2003, 05:45 PM
nah bro, didn't i tell you?? i got a vtec version 2.25 firmware upgrade. it allows for three stage vtec actuation

wtf? hahaha
wat version am i running?

ginganggooly
24-12-2003, 05:47 PM
most likely 2.23. be careful not to end up with the beta version either. it can lead to hydro-lock.

joneblaze
24-12-2003, 06:16 PM
lmfao @ u shit-stirrers.... dont confuse us newbs.... biatches..... :P

booget
24-12-2003, 07:12 PM
hehhe sorry me bad, its christmas and im bored like a mofo

fried
24-12-2003, 09:50 PM
now im confused, i thought i had the 2.5 alpha version withh mutlipoint variable valve timing engagement?

ginganggooly
25-12-2003, 11:17 AM
now im confused, i thought i had the 2.5 alpha version withh mutlipoint variable valve timing engagement?
no no no, the alpha version was only in non vtec cars. the alpha version conflicts with the muffler bearings in vtec equipped cars.

fried
25-12-2003, 05:35 PM
ah CRAP!
that sucks crap! they guy lied when i bouhgt the car then! i coulda got the car cheaper! CRAP!
im gonna bust osme balls...

no wonders jons gsi owns me... hes got the alpha version! DAMMIT!

booget
26-12-2003, 04:56 PM
nah his just running 2.5 piping mate
heheh

wynode
28-12-2003, 08:25 PM
Looks like the question has been answered.