Hurm, need some advice here on my exhaust system. I'm using a 1.3 efi satria, n i've changed the stock extractor to a zenden 4-2-1.When i did the change at the workshop, the mech advised to remove the cat converter to ensure the exhaust gas flow is not restricted, so i did juz that. The mech replaced the cat converter with a normal piping. Everything else was left at stock. Relatively I can feel the power at lower RPM (juz wut i was aiming for since i dont like revving high).

After a couple of days i found out that the noise is quite unbearable for me, so i went back to the shop and asked for a solution, n they said to add a bullet (some ppl call center muffler) to replace the cat converter that was removed earlier. I did juz dat n observed a reduction in the noise without any power loss, but the noise reduction was not as I expected. I was wondering if there is anything i can do to make the noise sound like stock again, while keeping (or better, increasing) my car's power?

This post has been edited by x800: Jul 6 2006, 12:51 AM

well, i didnt notice any difference in fuel consumption..btw, i juz drive my car to and back from work which is only around 10KM per day



i ran on direct pipe for only a couple of days, then i installed a bullet...huyo ur fren uses 3 bullets..maybe i can try add one more too but $_$ thx for da advice

This post has been edited by x800: Jul 9 2006, 11:38 PM

thom_chai, for ur 1.3 wira, there's only one sensor which is before the cat, so i dont think it'll screw up the sensor.egiewan's driving a civic meh,different from our proton. but u must know that removing the cat will increase the noise a bit..im still modifying my setup to reduce the noise

thx for ur insight.anyway,i managed to find a halfcut muffler from a mirage (IIRC got jasma tag ).izzit advisable to install it?can i expect noise reduction compared to my stock satria muffler?

lol.he said replace wif OLDER saga/iswara oem muffler lor.. shouldnt be noisy like the new saga/iswara muffler meh..

This post has been edited by x800: Jul 31 2006, 09:49 PM

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..

what brand is that bullet eh?i installed a zenden in my car for only RM110 (bullet RM90, installation RM20)..replacing the cat wif a normal pipe of the same diameter resulted in a higher noise for my car...