Powerloss after fitting muffler[need help]

Wassup Jazz owners,

I got my muffler fitted onto my car about a month ago, and I noticed that the strenght of the car is not as strong as before when it had the oringinal muffler on and also produces exploding kinna sound. A friend of mine said that its because the standard catalyt is still connected to the system. He advised me to go to workshop and get the cat chopped off and replace it with a steel pipe. He reckons that no harm will be done after that, and power will increase. I need some advice about this.


Ch33rs

so basiaclly ur mate is saying gut the cat, and have no cat back???

that will give you a $10 000 fine on the spot dude..

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Originally Posted by gmug3n

Wassup Jazz owners,

I got my muffler fitted onto my car about a month ago, and I noticed that the strenght of the car is not as strong as before when it had the oringinal muffler on and also produces exploding kinna sound. A friend of mine said that its because the standard catalyt is still connected to the system. He advised me to go to workshop and get the cat chopped off and replace it with a steel pipe. He reckons that no harm will be done after that, and power will increase. I need some advice about this.


Ch33rs

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wat muffler did u get? this is the 1st thread about this kind of muffler problem on jazz. U get rid of the catalic converter, most likely u gonna lose more low end... how big is the tip of the muffler, also wats the pipe size??

vtec_jet

What's ur advice to get the power restore?

Zimp13

Arospeed carbon fibre
pipe size is 2.25 inch...cant remember the tip of the muffler
what do u think i shud do??

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Originally Posted by gmug3n

Zimp13

Arospeed carbon fibre
pipe size is 2.25 inch...cant remember the tip of the muffler
what do u think i shud do??

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jazz has a small capacity engine... 2.25 inch is too big... max size is 2"....also if the tip is too big u ll lose back pressure..... as for the sound, i guess thats the sound that the muffler produces....

this jus soundz wierd in a way there shuldnt really a problem ..
Is it welded on or bolt on? any resonators? first thing i wuld think of is the quality of the muffler and also the installation of the system.. a high flow cat could do the job...

ive seen a jazz wit 2.25 size piping on them, neva thoguht it wuld be a problem... 2 inch wuld probably be a good option to consider though

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Originally Posted by vtec_jet

this jus soundz wierd in a way there shuldnt really a problem ..
Is it welded on or bolt on? any resonators? first thing i wuld think of is the quality of the muffler and also the installation of the system.. a high flow cat could do the job...

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the resonator is on the bpipe of the car... wats that gotto do with the power loss?

a muffler and its piping which are too big for the car will cause loss of power.... cant put a muffler for turbo car on a na car... 2.25" is simply too big for jazz.... i havent seen any 2.25" bolt on muffler for jazz yet

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Originally Posted by vtec_jet

ive seen a jazz wit 2.25 size piping on them, neva thoguht it wuld be a problem... 2 inch wuld probably be a good option to consider though

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really???? :confused:

so if i just replace the cat everything will be fine??guess i have to pop back to the workshop and ask them bout it,sound of the muffler doesnt reallly matter to me but its just not worth it to fit a muffler to get the sound and loses power....

2.25" pipe is too big. You will certainly lose power. Get it changed to 2".

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Originally Posted by gmug3n

so if i just replace the cat everything will be fine??guess i have to pop back to the workshop and ask them bout it,sound of the muffler doesnt reallly matter to me but its just not worth it to fit a muffler to get the sound and loses power....

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i guess thats certainly 1 way of finding it out.... and all the best.... :wave:

hehehe
I was offered a cobra 2.5" before but rejected it
Im not sure wat the actual problem is, prolly the guy fitted wrongly or the muffler just doesnt suit jazz. im confused...

yeh jus go the 2" pipe, and see how it goes...

Zimp13- was asking bout the resonator just so i know the setup, i am aware of the power loss of a car wen piping is too big etc etc....

Thanks for the info zimp13
Do need advice and inspirations
Only minimal knowlegde about car performance modif
More into sound sys

So u guys reckon i should change the muffler??

carboy,

u have pics of ur jazz??

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Originally Posted by vtec_jet

yeh jus go the 2" pipe, and see how it goes...

Zimp13- was asking bout the resonator just so i know the setup, i am aware of the power loss of a car wen piping is too big etc etc....

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vtec_jet, i wasnt pointing anything towards u... :thumbsup:

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Originally Posted by gmug3n

hehehe
I was offered a cobra 2.5" before but rejected it
Im not sure wat the actual problem is, prolly the guy fitted wrongly or the muffler just doesnt suit jazz. im confused...

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gmug3n, where u located anyway? not a good recommendation from that guy at all.... :thumbdwn:

mate.. whatever you do.. keep the CAT... for the environment...
Ziimp13 can probably sell you a high-flow cat...

with the exploding do you get flames as well :) whats the welding like and the pipe bend on the pipe that comes off the b-pipe, is it bolt on or did you get your old one chopped off?

yeh i would agree with that.

i got a hi flo sitting around but its 2.5"

the noise is what u call farting.. personally. i dont belive honda's should have exhausts on them, well at least if u dont need it.. sounds funny..

its completely not relate to the cat bro.....just the pipe is too big...coz you lost back pressure......so you have no low end power.....but may get more gain on high end....but not for normal street use......high flow cat may help but you should get rite size piping for the car 1st.......there is nth to do with the cat bro...hope this help....

punching out a cat achieves NOTHING as well.

Ive seen it done a few times and it made no difference whatsoever!

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Originally Posted by 08ESE

punching out a cat achieves NOTHING as well.

Ive seen it done a few times and it made no difference whatsoever!

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apart from making ur car sound louder :P

didnt even do that

in jazz high flow cat makes some differences...

Hemm.. changing the exhaust should not effect much on the accelleration whats so ever. Unless you get the entire new exhaust system. Which I believe Zimp have it.

However since you lost power! it only mean the exhaust installed is not for your car. Getting rid the CC will make it worst.

The only best thing to do is to replace the current exhaust with the one made for Honda JAZZ. or just get the entire system (header, downpipe, bpipe, and exhaust)

shouldnt buy the cheap canons in the first place bruh!

i got cheap cannon off these forums for my jazz and it definately made it more responsive in the higher end of the rev range and improved fuel economy. Everything in the jazz seems to be restrictive.

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Originally Posted by air23box

its completely not relate to the cat bro.....just the pipe is too big...coz you lost back pressure......so you have no low end power.....but may get more gain on high end....but not for normal street use......high flow cat may help but you should get rite size piping for the car 1st.......there is nth to do with the cat bro...hope this help....

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Brought to the guy who fitted my muffler and he said that it's just strange for power loss. When i asked him about changing high flow cat, he said its not a good idea...will lose more power.

So i brought to a mechanic i know who focused on jap cars modification. He said exactly the same thing as u. Pipe is too big, lost back presure. He advised me to fit a VAFC or change the muffler. Recommended spoon,mugen or hks.
1) spoon has reasonable price, but only n1 style for jazz
2) mugen is a little too expensive
3) hks - few styles and price ranges between spoon and mugen.

I have to wait a little longer to get new mufflers from home, now have to stick with the current one for a bit. Parts in australia are too expensive.

whats the diff between high end and low end??

thanks for the info

Which type of intake do u guys think is better??

pod filters or just replace the standard one??

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Originally Posted by gmug3n

Brought to the guy who fitted my muffler and he said that it's just strange for power loss. When i asked him about changing high flow cat, he said its not a good idea...will lose more power.

So i brought to a mechanic i know who focused on jap cars modification. He said exactly the same thing as u. Pipe is too big, lost back presure. He advised me to fit a VAFC or change the muffler. Recommended spoon,mugen or hks.
1) spoon has reasonable price, but only n1 style for jazz
2) mugen is a little too expensive
3) hks - few styles and price ranges between spoon and mugen.

I have to wait a little longer to get new mufflers from home, now have to stick with the current one for a bit. Parts in australia are too expensive.

whats the diff between high end and low end??

thanks for the info

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How about getting Xforces exhaust? Its cheap and have good quality. Compare to the above mention. Plus its Australian design, right zimp?? ;)

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Originally Posted by gmug3n

Which type of intake do u guys think is better??

pod filters or just replace the standard one??

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Without any changes in the exhaust, you should go with standard K&N filter or simota..Open pod will decrease your performance..

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Originally Posted by gmug3n

1) spoon has reasonable price, but only n1 style for jazz <-- wrong

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http://www.spoon.jp/jp/products/imag...eup/410_09.jpg

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Originally Posted by KingRichard

How about getting Xforces exhaust? Its cheap and have good quality. Compare to the above mention. Plus its Australian design, right zimp?? ;)

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definitely... hehe...

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Originally Posted by gmug3n

Which type of intake do u guys think is better??

pod filters or just replace the standard one??

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lol fix your exhaust first man!

leave pods to another thread man, stay on topic!

:eek:

wtf!! lol.. u cant cut the cat off... lol... who ever told you that is an idiot...