Exhaust System - Extractor

Following are the link with circulated in the net regarding header modification:
1. http://www.team-integra.net/sections/articles/showArticle.asp?ArticleID=50
2. http://www.burnsstainless.com/TechArticles/Theory/theory.html


This what we can conclude:


a. Header Diameter

- Bigger Diameter Header Shift Torque To higher Rpm. (Vice Versa for Smaller Diameter).
- Diameter Stepping to avoid exhaust reversal:

from Dave Stadulis at SMSP

you don't want to have the exhaust port on the head exactly matched to
the manifold/header...I've been told to have the header port about 1mm
(.039") larger all around the head port and no larger than 1/16". This
provides an anti-reversion attribute to the header. The same goes for
steps in the individual tubes.




b. Header Length
- Longer tubes will create more torque at the rpms below peak torque.


c. Collector Design

Shorter, large diameter collectors have more peak power.

Longer , smaller diameter collectors have more power in the midrange.



d. Sequential Pipe Paring

-neo cps 1-4, 2-3

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short bullet + mid box = noisy, gud pickup, top end not

long bullet + mid box = bassy not noisy, gud pickup, top end gud

bullet = 15" to 18" straight flow not swirl

maintain ori size piping and route

ekstraktor ( 4-2-1 @ 4-1 ) > nenas > tabung dpn ( catcon / bullet ) > tabung tgh ( silenser / bullet ) > piping > end mufler..