swirling bullet creates more backpressure.... possibly reduce less noise abit...

exhaust gas does not need to swirl out... it should exit in pulse manner so that it is able to help scavenge the following pulse....

so, if i wanna do exhaust setup for my auto city type-z, which shop do u recommend bro catacombs?

my current setup is 4-1 header, 1 swirl bullet and s-flow muffler.
so, to reduce my exhaust sound is change the swirl bullet to normal one?
or change my s-flow muffler?
really want to minimize the noise although got nice bass sound

change swirl bullet to normal long bullet enuff d
u change ur s-flow and get a straight flow later comfirm rempit sound
for bassy sound stick with s-flow or from eulope mali backbox

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Added on May 9, 2011, 12:53 amget s-flow , 1 mid bullet and retain almost factory size piping to compensate ur auto box

This post has been edited by sinister_sid: May 9 2011, 12:53 AM

i drive a satria neo cps manual...
previously i used stock extractor with performance catback exhaust( 1 bullet + s-flow muffler) and the sound is nice bassy...
but then when i changed to hotbits 4-1 extractor, the sound become very noisy and "pecah" too..anybody here can help me how to overcome this problem??

friend using 4-1 no prob..but he is using center bullet and straight flow tabung behind...

ur s-flow can sell to auto car users

do u mean i need to use straight flow?? if i change to straight flow, then my low end will become even worse..using 4-1 already cause my low end become really sucks

keep your 4-1....ur tabung behind use straight flow...not straight flow bullet ah beng lalachai sound...but the box type...your cps is for high end....when ur lift kicks n n goes all the way to (dono exact rpm cps can reach)rpm u will feel the pull.....dont restrict yourself with 4-2-1....but the choice is up to u ultimately....

i drove his car no problem...fuel consumption better than standard car with the additional power (but he has done intake mod already airbox filter etc)

the rpm will only go till 7k..
hmmmm......isn't straight flow muffler will cause the sound to be even louder?? actually what i wan is to make the sound deeper(not annoying)...sum people tell me to add a good quality bullet...r u sure changing to straight flow muffler will make the "pecah" sound go away??

maybe u can meet my friend and have a look at his car one of these days......pm me ur contact when we yc can call u along =)

he is using bullet...no swirl inside just straight.....his sound is not pariah/ahbeng....and low rpm no sound only when tekan

hi all sifu,i just change from straight to s-flow muffler due to mine is auto and currently i'm using the midbox with swirling oval type ...should i change to midbox normal type or round type? feel abit too much of back pressure

This post has been edited by william85: May 15 2011, 02:18 AM

hello guys..

if changing to performance camshaft needs to change to adjustable cam pulley also?

This post has been edited by dibo: May 20 2011, 02:57 AM

From matspeed/powerzone, not necessary, others not sure
But recommended if you really wanna fine tune the cams to your liking

alrite, thnx shinjite..

better get 1... so you can fine tune your powerband. either you want to optimize compression stroke or power stroke.

Guys. do exhaust have carbon build up over the years while you are using it?

I am planning to upgrade my exhaust, but dont want any bassy rumbles.
Can I upgrade my extractor and then the piping without touching the muffler? (means muffler will maintain stock form)

Yes you can. Get a twin tip s-flow muffler. It have better flow compare to stock single tip s-flow. Not as noisy as straight flow muffler

anyone here has experience of everco products?

This post has been edited by lyordson: May 23 2011, 10:09 PM

does it help acceleration if i use twin exit setup, like old satria gti type, for say a v6 engine?

Usually from what i see those twin exit setup is only 1 exit . Another 1 is for dummy looks i mean for cosmetic purposes .

About acceleration i think just maintain your stock piping size . Get a nice Extractor probably a mandrel bent one which are usually made of stainless steel . Nice mid-bullet and a good muffler .

S-flow / Straight flow . It will depend yours auto / manual .

This post has been edited by Peekab0o: May 24 2011, 05:28 PM