hi, powerzone or hotbits extractor,which one ok?my car is Persona elagance auto..i ady got hotbits mid and rear section..juz wonder wanna use powerzone or hotbits extractor.tq

recently i ady install powerzone extractor in my persona auto,if i wanna use hotbits mid and rear section,the performance ok or not?i means low and mid end torque and maintain top end as well..

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Added on April 5, 2011, 10:08 pmrecently i ady install powerzone extractor in my persona auto,if i wanna use hotbits mid and rear section,the performance ok or not?i means low and mid end torque and maintain top end as well..

This post has been edited by samwongjyhhorng: Apr 5 2011, 10:08 PM

i should install 2 bullet and s flow muffler,1 bullet,1midbox and s flow muffler or juz use the hotbits mid and rear?i was use the powerzone extractor nw..pls give me d suggestion.tq

so install 2 bullet and s flow muffler oso can gain more low and mid end,and can maintain top speed as well,rite?i dun wan noisy so i choose two bullet..

my exhaust system setup is 4-2-1 powerzone extractor,2 bullet and s flow muffler for my persona auto..but i found tat my muffler sound quite loud..why will be like tis?any solution to reduce the sound?

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Added on April 20, 2011, 6:26 pmanybody wanna install s flow muffler?i got stainless steel s flow muffler for sell onli RM180..use less than 1 week

This post has been edited by samwongjyhhorng: Apr 20 2011, 06:26 PM

4-2-1 extractor,one bullet(dun use swirl one,will more noisy),one mid box and s flow muffler..tis is d way to minimize the sound..

today juz realized d distance of bullet and midbox of my car is onli 4 inch..d exhaust shop advise me to extend it to 12inch lo..is it will got more power after i extend it?

recently my setup for bullet and midbox,the distance between bullet and midbox is around 4inch..if i change the distance to 12inch,is it will affect the power?

This post has been edited by samwongjyhhorng: Aug 10 2011, 09:58 PM

midbox to reduce the noise lo..previously use 2 bullet,sound very noisy..so tat means after change to 12inch,then can gain more pick up and top speed?

wat is d sid branch resonator?how to do it my current setup is 4-2-1 powerzone extractor,bullet,midbox then is s flow muffler..my one is auto..the whole piping still remain ori size..

is it possible make the exhaust noise quite loud since my midbox and bullet distance onli 4inch,somemore i use s flow muffler?is it will reduce noise after i change the distance to 12inch?is it back pressure will reduce the pick up or top speed?i plan to remove my bullet and use midbox onli..it will make my car exhaust noise more louder or remain same?how about performance?

my car was use 4-2-1,12inch bullet and midbox,then is s flow muffler..plan to take out the bullet and use midbox onli,is it will affect the performance?my car is persona auto..the pipe diameter still remain stock..is it i need to change to more larger or more smaller diameter?

Is it nobody can help me to answer my question?another question is my bullet n midbox distance onli 4inch,is it oso wil affect top speed?

piping diameter still is original..if i take out the bullet and use the midbox onli,isit performance still remain same or more worse?

i asked around 3 exhaust shop oledi..all told me different story..one told me take out is same,one told me the distance of bullet and midbox too near,need extend to 12inch lo..so i hope sifu here can help me

[quote=upontheriversky,Oct 12 2011, 02:28 AM]
i guess kelisa stock gear ratio at higher gears are not meant for accelerating, more for cruising so its more difficult to spin the engine faster at higher gears to achieve high rpm, so more difficult to get high exhaust velocity. i think the same goes for most daily car stock gearboxes.

thats why 3-1 or bigger piping really good for pickup, at lower gears its easier to go i.e. 7-8k rpm and bigger pipe size can be used effectively in this case
ooh fark..lets do it hahaha

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Added on October 12, 2011, 2:57 am

keep the 4-2-1, keep stock piping, if midbox is straight and has larger diameter internal pipe than bullet, then keep it and remove the bullet, remove s-flow and replace with straight flow muffler that has same internal pipe size as ur stock piping or close enough. Make sure straight flow muffler at the back has diameter not more than 0.5" from ur stock pipe but if u can find same size is always the best, can use more than 0.5" but not efficient so best to avoid. most exhaust shop will say can use much bigger diameter muffler but does not say whether it is the best for ur car

midbox position plays a big role in the exhaust powerband so pay attention to the location in ur system. basically shorter distance between midbox and extractor will boost power at high rpm and longer for lower rpm.in general 12-18" for higher rpm, 18-30" for midrange and 30-42" for high torque at lower rpm, but anything shorter than 12" can lose out on potential power plus its not possible to fit a midbox at 12" after extractor, that would be near gearbox or crossmember d. i think for auto its best to use distance between low and mid range, something like 24-36" as gear shift point is usually in this rpm area

more specific distance i would need some info on ur engine.

noise wise, i like to think of the noise level of a muffler as a function of its body to pipe size ratio. when comparing 2 mufflers, i.e. given the same body dimension, the smaller internal pipe will sound much lower. so if u have a tight noise regulation rule, get the biggest body muffler u can fit under ur car having smallest internal pipe that flows enough for ur engine and application. plus silent and fast car looks more sophisticated hehehe



bottomline, never use sflow if power is what u want.

[/quote

my car is campro 1.6.so tat means after i take out d bullet,d performance oso same,rite?if i use bec ori midbox instead of my current midbox,is it ok?

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Added on October 12, 2011, 8:13 am[quote=upontheriversky,Oct 12 2011, 02:28 AM]
i guess kelisa stock gear ratio at higher gears are not meant for accelerating, more for cruising so its more difficult to spin the engine faster at higher gears to achieve high rpm, so more difficult to get high exhaust velocity. i think the same goes for most daily car stock gearboxes.

thats why 3-1 or bigger piping really good for pickup, at lower gears its easier to go i.e. 7-8k rpm and bigger pipe size can be used effectively in this case
ooh fark..lets do it hahaha

---

Added on October 12, 2011, 2:57 am

keep the 4-2-1, keep stock piping, if midbox is straight and has larger diameter internal pipe than bullet, then keep it and remove the bullet, remove s-flow and replace with straight flow muffler that has same internal pipe size as ur stock piping or close enough. Make sure straight flow muffler at the back has diameter not more than 0.5" from ur stock pipe but if u can find same size is always the best, can use more than 0.5" but not efficient so best to avoid. most exhaust shop will say can use much bigger diameter muffler but does not say whether it is the best for ur car

midbox position plays a big role in the exhaust powerband so pay attention to the location in ur system. basically shorter distance between midbox and extractor will boost power at high rpm and longer for lower rpm.in general 12-18" for higher rpm, 18-30" for midrange and 30-42" for high torque at lower rpm, but anything shorter than 12" can lose out on potential power plus its not possible to fit a midbox at 12" after extractor, that would be near gearbox or crossmember d. i think for auto its best to use distance between low and mid range, something like 24-36" as gear shift point is usually in this rpm area

more specific distance i would need some info on ur engine.

noise wise, i like to think of the noise level of a muffler as a function of its body to pipe size ratio. when comparing 2 mufflers, i.e. given the same body dimension, the smaller internal pipe will sound much lower. so if u have a tight noise regulation rule, get the biggest body muffler u can fit under ur car having smallest internal pipe that flows enough for ur engine and application. plus silent and fast car looks more sophisticated hehehe



bottomline, never use sflow if power is what u want.

[/quote

my car is campro 1.6.so tat means after i take out d bullet,d performance oso same,rite?if i use bec ori midbox instead of my current midbox,is it ok?


This post has been edited by samwongjyhhorng: Oct 12 2011, 08:13 AM

Is it auto car can use 4-1?wat difference wit 4-2-1?

[quote=Max_speedz,Nov 17 2011, 12:49 AM]
wah what happen to ur cvt gbox??
scared something happend with my sis car bcoz i already 5 day lenjan her car 140kmh going to work and jalan2 recently...

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How to knw d exhaust got leaking or not?my car oledi modify full exhaust.after start d engine,when i am stand beside d driver door,i can smell d gas perfume..when i lie down look at mid box there,i stil can smell it.is it cause by leaking?

Can teach me how to check whether exhaust got leaking or not?

My setup nw is 421 powerzone extractor,bullet,midbox n s flow muffler.b4 tis wit extractor onli,i can hit 200kmh.nw after change mid n rear,once i hit 185kmh then difficult to climb to 200.d feel is,when i speed 180 wit a bit more than half pedal,d rpm around 4.7k,then i full throttle it,d rpm wil climb to near to 5k rpm,then after within 3sec,then it wil drop to 4.7k bec.then it cause difficult to over 185 lo..after i test release n press again full throttle,then it wil happen again wat i mentioned b4.is it i need change d piping size?my car is persona elegance auto