extractors..

[denrie]

For an eg with a b18c2 motor what would be the best solution for extractors 4-1 or 4-2-1? and wheres the cheapest and good place to go? (in the west) blacktown, mount druitt area, parra, livo?

[croatiaboi]

you can get xforce or 5zigen headers pritty cheap from some of the traders on here

[felixd]

4-1 headers hp output on high RPM, 4-2-1 headers hp output mid range n low range rpm.

[Limbo]

i disagree. i had JDM 4-1s and i gained in low to mid also over my 4-2-1.

[philBo]

4-1 headers hp output on high RPM, 4-2-1 headers hp output mid range n low range rpm.


i disagree. i had JDM 4-1s and i gained in low to mid also over my 4-2-1.

thats always a confusing debate, as the status quo generally say that felixd is correct. however theres a huge pocket of people who agree with limbo. wish the sydney folk went through with that extractor dyno test. :( wouldve laid this to rest once n for all.

[rbk_212]

4-1 headers hp output on high RPM, 4-2-1 headers hp output mid range n low range rpm.

i agree but i also understand that some people think (like 'limbo') that 4-1 is better all over. i think it depends on the quality of the extractor but as a general rule, 4-2-1 better for low to mid range.

i have 4-2-1 on my dc2 and i got a noticable gain in those areas

[croatiaboi]

from what i gather i read on here somewhere that a cheap 4-1 header will be better then a cheap 4-2-1, however a top shelf 4-2-1 header is better then a top shelf 4-1.

[Limbo]

i agree but i also understand that some people think (like 'limbo') that 4-1 is better all over. i think it depends on the quality of the extractor but as a general rule, 4-2-1 better for low to mid range.

i have 4-2-1 on my dc2 and i got a noticable gain in those areas

Just wondering if you have tried both? cos i have. It helps when you have friends who have exhaust shops. Cos i tried a variety of combos before settling on the JDM 4-1s.
But then its up to you what setup you would like, cos i only post what i've experienced

[nick_sixx]

i doubt you would really be able to feel that much of a difference....

[squish85]

I've J's racing 4-2-1.. on a B18C2 feels more torquey than before.. noticeable gains (Not huge).. especially on uphills.. Feels more low to mid.. A decent installation will cost u abt 200+.. (good job no nonsense) ..

[ek4-guy]

thats always a confusing debate, as the status quo generally say that felixd is correct. however theres a huge pocket of people who agree with limbo. wish the sydney folk went through with that extractor dyno test. :( wouldve laid this to rest once n for all.

you mean something like this

and yes i know it's a repost


http://bob123e.tripod.com/thegreatheadertest/

[allzilamon]

ive tried both 4-2-1 and 4-1.
and 4-1 FTW my friend!

[nick_sixx]

as if you need someone to install headers...well 2 piece ones are easy enough.

[rbk_212]

Just wondering if you have tried both? cos i have. It helps when you have friends who have exhaust shops. Cos i tried a variety of combos before settling on the JDM 4-1s.
But then its up to you what setup you would like, cos i only post what i've experienced

when you say 'JDM' do you mean from a jap spec dc2r? coz the extractors engineered by Honda for a Type R dont get much better.

a 4-1 extractor is more free flowing, which lends it to be being better at the top end, much in the same way as large diameter exhaust piping is suited for top end (hence big bore race exhausts), and smaller diameter is better for low to mid range as it helps exhaust scavenging and the most efficient volume of gasses passing through he exhaust pipe is reached at a lower RPM

All i was saying that simple physics can tell us that 4-2-1 are good for low to mid range, not that your 4-1 extractors arent any good

i'll also restate that the gain you will get is dependent on the QUALITY of the extractor not just its configuration

[denrie]

thanx for the help guys. much appreciated

[NSPYRE]

tri-y header ftw...