JDM ITR headers worth the upgrade!

[jko2]

Hey guys im a bit of a noobie with integras, just wanted to know if it was worth upgrading my JDM itr headers to like say mugen style? I have a jdm teggy but i dont know nothing about. Im getting my bc zorst this weekend and wanting to have a full exhaust system instead of just cat bak with standard headers. Could someone please give me some advice. i would appreciate that very much

cheers

[IZY-10]

im not sure if you will gain much as JDM ITR tegs come standard with 4-1 headers

[TRU32U]

hey guys sorri to hijak the thread for a sec but is there a difference with the aus spec n jap spec headers?? my one in my car looks heaps heaps small...

[45SET]

DC2r or DC5r?

Not sure about the DC2r, but I know its worth the upgrade on a DC5r

AUDM = 4-1
JDM = 4-2-1. Has a VERY simular style to the Toda head... except its made of steel, and isn't as big as the toda.

[Q_ball]

DC2r or DC5r?

Not sure about the DC2r, but I know its worth the upgrade on a DC5r

AUDM = 4-1
JDM = 4-2-1. Has a VERY simular style to the Toda head... except its made of steel, and isn't as big as the toda.

What teg are you referring to up there?
For the DC2R im sure the AU spec is 4-2-1 and the JDM spec is 4-1.

[45SET]

What teg are you referring to up there?
For the DC2R im sure the AU spec is 4-2-1 and the JDM spec is 4-1.

I'm refering to DC5r

[jas_kidd32]

hey guys sorri to hijak the thread for a sec but is there a difference with the aus spec n jap spec headers?? my one in my car looks heaps heaps small...

I want to know this too. Am I going to benefit from upgrading my AUDM DC5R header to JDM OEM type?

[faijai]

i own a dc2r
changed my headers to jdm 4-1 headers with my stock itr catback.
didnt feel any difference
on a dyno maybe.
even an air filter makes more of a difference.
also, keep in mind my car at the time had stock itr catback with a modified intake system.

[[CRA23]]

iif its a dc2r it depends on the year 95 to early98 jdm itrs had the same as aus but its an 98 on its the good 4-1, so no need to change

[Shraka]

You've gotta keep in mind guys, a Type R is pretty well sorted from factory. They make the exhaust that size for a reason. Upgrading it may actually loose you a bit of power as the standard exhaust is tuned to scavenge exhaust gas from the cylinder and actually flow better than a larger exhaust.

I think it was when they got the DC5R in America (or was it Australia? I forget), when the exhaust companies first bolted on larger exhausts, they actually lost a bunch of power. It took them ages and many combinations before they eventually nailed it and got more power, and it was something like a 4hp increase or something.

Bit beyond basic upgrades, but this is worth a read:
http://www.toymods.net/forums/showthread.php?t=27535

[rikstar]

Hey guys im a bit of a noobie with integras, just wanted to know if it was worth upgrading my JDM itr headers to like say mugen style? I have a jdm teggy but i dont know nothing about. Im getting my bc zorst this weekend and wanting to have a full exhaust system instead of just cat bak with standard headers. Could someone please give me some advice. i would appreciate that very much

cheers

jko2 if you do decide to upgrade your headers and want to sell the JDM one, let me know I would be interested. :p

[jko2]

no worries, yes it is a 96" jdm ITR. i love it but i just want some more sound and performance =)

[jords]

I have 4-1 on my dc2r and i definitely think it go's harder, and is a little louder, however with an N1 twin loop muffler the exhaust note is not over the top.

[naf]

think the early jdm dc2 type r integra were 4-2-1 headers. If the headers r like the stock 4-2-1 Aus dc2r header, i would change them if u want more power.

I have dc sport 4-1 headers, which are pretty much same design as model jdm dc2r 4-1 headers, and noticed a difference. Especially in vtec change over to top end.

[bennjamin]

JDM ITR before 98 had a 4-2-1 header. 98+ had a 4-1 header.
IMO the jdm ITR header is decent bang for buck. On an untuned mild motor you wont get much better.

[adnoh]

JDM ITR 96 Spec ( and AEM ITR ) were 4-2-1 headers which make by die-casting . therefore the internal walls of the header r very rough and UNSMOOTH :( . It will cause the exhaust flow with not so smooth and eventually affect the output performance.

The Advantage of 4-2-1 headers is strong improve at Low & Mid REVs , we will get a better take off than 4-1 headers. But end up we will lose abit at HI REVs due to the design of 4-2-1 is not much improve in HI REVs section & the process way of the header ( Die Casting :( )


JDM ITR 98+ Spec had a 4-1 stock header which make by stainless steel , hence better performance gain up at HI-REVs and much Smoother due to the design (4-1) & the material ( Stainless steel :) ) choosen by Honda.

Therefore, some of the Honda VTEC experts also called JDM ITR 98+ as 210hp ITR :p



sorry about my english , hehe

[votek]

the 96+ spec JDM 4-2-1 is the same as the AUDM spec from the 99+?

[adnoh]

the 96+ spec JDM 4-2-1 is the same as the AUDM spec from the 99+?

yes :angel:

[votek]

ok thanks.

[adnoh]

ok thanks. i guess theres no point upgrading.

no worries;) , I just do my best to explain the differences between the header designs only :D

[xtercii]

JDM ITR 98+ Spec had a 4-1 stock header which make by stainless steel , hence better performance gain up at HI-REVs and much Smoother due to the design (4-1) & the material ( Stainless steel :) ) choosen by Honda.




sorry about my english , hehe

so you are saying stainless steel is a smoother material than say, mild steel?

[adnoh]

so you are saying stainless steel is a smoother material than say, mild steel?

:Dno , I mean stainless steel makes the exhuast flow much smoother then Die Casting made.

[45SET]

stainless steel has a smooth internal pipe surface, where as the cast internals are rough.... the smoother the surface teh gass has to travel over, the faster the flow... and as the main goal of an exhuast/header is to get rid of gas... the more/faster your can get out... the better.

the more you flow, the more power you can possibly make.

[BlitZ]

JDM ITR headers are very well tuned.. but the ports are all that clean.. should still out dyno most aftermarket though

[votek]

the JDM 4-2-1 header i have, has 2 types of metal on it. looks like its cast iron on the 4-2 then the bottom part is maybe stainless steel?

from experiance, do you think it is good idea to upgrade?

[45SET]

yes..

[Shraka]

I thought the roughness of the surface created a small dead zone at the edge of the pipe, which allowed air to flow more freely?

[45SET]

There is a reason why top of the line off the shelf catbacks are made out of stainless... part of the reason why titainium is also used a fair bit.

smoother = better

damn... i gotta find more work to do at work

[Shraka]

I thought titanium was used because it's light, and strong so you can use less of it = even more light.

[45SET]

yeah... thats what makes it better then stainless... its weight.
but other then that, both have a smooth inner surface.

[votek]

sorry to hijack the thread. will the JDM 4-2-1 header fit into the stock ADM cat and cat back?