If you don't want loud noise, use the S-flow mufflers instead

icic.... what is the beauty side of this exhaust ?

ofcourse for increasing performance.. BUT, if u dont know nothing about ur engine, dont ever think of doing it. If ur engine still a stock standard without any modification, dont every try to do it or you'll end up lossing power and super high fuel consumption.

this setup also called as direct pipe setup.

i saw R3 MME waja manual is using this type of exhaust....

but they nvr mentioned it's performance...
but since it is a direct piping, this exhaust setup is suitable for manual only izzit?

yes, should be for cars with manual transmission. Cars that mostly uses this kind of setup are those with VTEC engine and those forced fed cars..

greeting sifus,

I'm driving a stock 4g13 year 02(siemens) and seeking some performance gain with minimal cost.

1-my ori extractor should be 4-1 if i'm not mistaken, and now i'm really confuse .. some people told me not to change the ori extractor to 4-2-1 as the stock extractor provide more low end power. Anyone can clear my doubt?

2-My other question is .. can i use back the ori piping and muffler if i wunna use 4-2-1 extractor?

3-Does changing the 4-2-1 increase FC ?

4-I heard that zenden 4-2-1 were quite good, does anyone really feel the performance increase using buttdyno?

thanks

nicotine, i'm using the same engine as urs, and my car is year 2001..

1. honestly i did feel the increase in low-end power after changing to the 4-2-1 extractor from the stock 4-1.

2. i am still using the ori piping and muffler, only changed the extractor (and replaced the cat wif a center bullet)

3. i think the fc depends on the way a person drives..for me, after changing to the 4-2-1 extractor, i felt that i dont need to rev more to get pickup, so my fc decreased but not significantly.

4. my extractor is also a 4-2-1 zenden extractor, and it is quite good in terms of cost.there are other brands of extractors out there which costs more (eg. powerzone), and i honestly dont know their performance coz i've nvr used them before.nvr did any dyno testing either for this zenden..

sorry, off topic for a while.
any sifu kind to open another thread for internal engine mod such as cam or ignition timing or etc?

just wanna ask : these modifications will increase fuel consumption or not?

if done correctly with proper piping size and design, it will not have a significant increase in fuel comsumption,
but of course the car will increase in power or torque

a cat back system usually ment for high revving engines such as cars with vaiable timing. turbo cars on the other hand can have them as the do not depend much on the pressures that happen through the whole exhaust system.

for those who dont do high revving and prefer a relaxing drive Below (4000rpm), an ideal setup for me (if u are driving in town) and on most cars will be a 4-2-1 extractor, a mid box just after the flex joint and then a rear muffler. (depending on auto or manual, use an S-type for auto).... this setup will help improve low end torque that is needed for town driving.

if u like to high rev the engine,there are 3 ways.
1. i suggest u go for a 4-2-1, a midbox slightly in the middle of the car (abt 1-2 feet away for the flex joint) and a rear muffler (again s-type for auto). this will help ur high end and top speed but not make it undrivable in town.

2. the second is using a 4-1 extractor, a midbox placed right at the back just before the fuel tank, and a rear muffle. i would say that this is best done ONLY ON MANUAL CARS. this setup will work wonders in high end but will be really bad in the low end torque.

3 the third of course is the extractor and a rear muffle only, (but will be really noisy) most of the time....

does this settings applies for kancil?i modified my muffler already...but not extractor...

actually it differs from car to car... but generally it works, exhaust tuning also depents on what the driver wants. for a k-kar, the most important thing is not getting the pipes too big in diameter...

there are so many factors to decide on how an exhaust is to be tuned. Usually the factory stuff is tuned for the ideal balance to THEM. you should also take into consideration your driving behaviour and also the terrain which you would more frequently encounter to get better optimization.

like F1 cars have a lot of valve overlap, with minimal flow restriction on the exahust and intake. The exhaust also features scattering to reduce resonance at maximum output.

If you took that system and fitted it onto your car, first of all it wouldn't start. Then even if you could, you would have to set the idling at 6000 rpm minimum. Also, you would complain about the lack of pickup at lower rpms and heavy fuel consumptions cos the cams are tuned for very high throttle duty cycles.

All in all, there is no fixed tuning formula for each person.

This post has been edited by sakaic: Aug 28 2006, 04:25 AM

hmm, jaafar at jfa sunway made this setup for me, as i was wondering on why he installed a bullet few inches away from the flex joint. now i get the idea.
however im thinking to reduce the noise level as im using 2" pipe, 1bullet n a tanabe non-jasma approved (ori, oval n-type).. aside from custom made a silencer or sell the tanabe n get twinLoop, is there any other way?
i doubt i can install another bullet as the 1st one already at the center of the car

*car is civic eg sohc non vtec 1.6
**car is happy rev.

already a good setup, and from a reputable shop some more... i think u should look for a better rear end, if in doubt then go for one with a jasma tag. at least they are proven in terms of how loud will the sound be.... hehehe

JASMA certified exhausts are those approved street legal in Japan, so the sound should be quite low.

may i know what is twin loop exhaust??

Twin loop

Hi shinjite,soulfly,pacer and guys, cat-back exhaust? wowo...thats too extreme man..your car will sound like real Mini Bus. LOL Many muscle cars use that design, it makes me look outside of my house when they pass by. I thought why so late still got mini bus 1...haha;) no offense to those members who using cat-back. Performance wise, thumbs up thumbs up. Respect for those with turbos. Sounds awesome!!

Zenden? if any of your cars can fit in Zenden 421 extractor, i say go ahead while stock lasts. Just like today, I am getting the 10th piece of extractor from kent20 to satisfy one of my customer's demand for extractor while the other 9 customers are very satisfied with the stuff. Dont worry that you will lose little of your low end power, you will gain a lot in middle end and high end. The power kicks in around 3k-4krpm if you're using stock exhaust system for manual cars. Change your s-flow muffler to straight flow to gain back your low end power. For nice solid sound, of coz' get Monza or FGK(Fujitsubo) and better exhaust flow. Get bullet to replace your stock midbox. Thats the best out of your exhaust system with a final touch on your pipings. oooOOooo...JUst my RM0.01 from my pocket anyway Look for me if you need any stuff..giving u all best price la..( sorry coz doing some promotions here, LOL:) )

This post has been edited by kweng84: Sep 2 2006, 09:34 AM

Twin Loop? Mugen imitation ..price about RM500 with installation...Pics below:
MUGEN TWIN LOOP (IMITATION)
MUGEN TWIN LOOP 2

Effect: Top End power and creates sufficient back pressure for auto cars especially with vtec.

*of coz if got money, get the original one...hmm...

This post has been edited by kweng84: Sep 2 2006, 09:52 AM