Need all the pros in ZTH for proper exhaust system for my ride.

[WhiteLighter82]

Hi to all the pros in ZTH, need your help on configuring a good exhaust system for my 4G91 Manual ride.
Thanks for the help in advance.

 

[just4z]

header stnd, piping 1.8, mufler 2.0

 

[WhiteLighter82]

Current setting is bullet with 1.7" piping and 2.0" muffler........
any ideas on 4-2-1 or 4-1..???

 

[DanzEterna]

4-1 extractor for pick up
4-2-1 for top end....

 

[WhiteLighter82]

Some workshop guys say that the 4-2-1 extractor should be bigger then the rest of the piping....
Make any sense..?

 

[just4z]

some say 4-1 cun for 4g93 but for 4g91 dunno. got guy change 4-2-1 cap ayam change back to standard. no power at top

 

[PocketRocket]

Danz....terbalik already

4-1 = top speed
4-2-1 = low to mid rpm (pick up)

 

[AD_EG]

4-2-1 extractor should be good for you.power comes at early rpm

4-1 for better top end power

4-2-1 for low/mid range power

in short,your peak torque will come in at later parts of the RPM range if you go for 4-1,and the other way round for 4-2-1.

when you are racing/driving fast...you drag your rpm all the way to lets say 7k,then shift rpm drops to maybe around 4k then it starts climbing again...till the next shift...from what i understand,for those who like to drag 4-1 is the best cause you will mostly be using high rpms...

but if your car is more for city driving or street driving ...go for 4-2-1..you'll be using more low to mid range power rather then high...you need to decide what you want or whats best for you.nobody can tell you what you want.

from the other extractor thread

Some workshop guys say that the 4-2-1 extractor should be bigger then the rest of the piping....
Make any sense..?

important key factors of an extractor is the length and also diameter.

from what i have read,bigger diameter shifts the torque to higher rpm's

longer tubes brings the peak torque to lower rpm's.

from that i am assuming,4-2-1 should have a smaller diameter and longer tubes

 

[PocketRocket]

kekeke...u just copy n paste what u just said....

 

[AD_EG]

kekeke...u just copy n paste what u just said....

ya bro...malas wanna type...i did the quote thing but its says my message to short,so i suppose to type another message which means more...wait now i will do an edit.

---------- Post added at 09:13 PM ---------- Previous post was at 09:05 PM ----------

edit already :D

 

[WhiteLighter82]

Thanks guys for all the info.....
I wonder what the mileage on a normal proper 4G91 on a wira should be per full tank.........
Any ideas guys............

 

[just4z]

must same or lower compare to old engine. if more no good to you money