Removing the Cat and Installing a Straight Pipe
#1
Removing the Cat and Installing a Straight Pipe
Any one has remove the Cat Converter and install a straight pipe on the mid part of the exhaust system?
I was quote $80 for a custom made straight pipe (screw in and removable)
The original cat pipe can be install back during inspection.
Do the straight pipe give a few more HP to the car and will it do any good or harm to the car.
Please advice
I was quote $80 for a custom made straight pipe (screw in and removable)
The original cat pipe can be install back during inspection.
Do the straight pipe give a few more HP to the car and will it do any good or harm to the car.
Please advice
#2
Remove mid pipe will definitely cause engine vibrates a lot during idling, low-end torque will diappear as you might find your car is harder to launch. However, exhaust will sounded better and better response in high speed. Typical straight pipe is more suitable for turbos. Not to forget fuel comsumption will go up too. But for $80, you should have a go to prove me wrong!
cheers
cheers
#3
Originally Posted by lennon
Remove mid pipe will definitely cause engine vibrates a lot during idling, low-end torque will diappear as you might find your car is harder to launch. However, exhaust will sounded better and better response in high speed. Typical straight pipe is more suitable for turbos. Not to forget fuel comsumption will go up too. But for $80, you should have a go to prove me wrong!
cheers
cheers
I thought with lesser resistance in the exhaust will give a better fuel consumption? how does it actually works?
#4
Originally Posted by morganoh
Does it means that Low end torque need back pressure from the Cat ?
I thought with lesser resistance in the exhaust will give a better fuel consumption? how does it actually works?
I thought with lesser resistance in the exhaust will give a better fuel consumption? how does it actually works?
Last edited by cuscorex; 07-25-2005 at 07:32 PM.
#5
Originally Posted by cuscorex
yes,the bk-pressure might b lost,but u got a more fast-flowin on the high.another ting to note,if u r runnin w/o the CO sensor,the 'chk engine' light wil lit.
Anyone try removing the cat before? Cos would like to seek for his/her experience before doing it myself.
#6
Originally Posted by cuscorex
yes,the bk-pressure might b lost,but u got a more fast-flowin on the high.another ting to note,if u r runnin w/o the CO sensor,the 'chk engine' light wil lit.
2. U definitely lost low end torque but mid/high will be free revving. Damn shiok and good for track as u are always on high rpm.
3. Does the major tuner make such replacement cat pipes? If yes, buy from them (typically around 15000 to 20,000 Yen). For direct fit type, they have all the necessary holes for the sensors.
Enjoy
#7
Originally Posted by EBS
3. Does the major tuner make such replacement cat pipes? If yes, buy from them (typically around 15000 to 20,000 Yen). For direct fit type, they have all the necessary holes for the sensors.
Enjoy
There's alot of cars modifying their cars everyday. including Audi and Pos as well.
I do not know if they know what they are doing, cos neither do I.
#8
Flip thru the Hyper Rev magazine. The straight thru racing section (pipe) is just a plain straight pipe replacing the stock Cat. A properly designed one will fit the Cat portion exactly and has the necessary holes for the sensors to screw in. U just need to take out the stock Cat, replace it with the pipe, plug in the sensors and finished.
Man exos 'specialized' in doing exos mods. I'm not sure of their workmanship cos never tried them be4. Those Jap ones are real nice. An alternative is to operate ur mufflers as this is not too obvious as removing the Cat. Man can do those as well.
Man exos 'specialized' in doing exos mods. I'm not sure of their workmanship cos never tried them be4. Those Jap ones are real nice. An alternative is to operate ur mufflers as this is not too obvious as removing the Cat. Man can do those as well.
#10
Bro... a friend of mine removed his cat, CEL came on and lost of low end torque. In the end, he replaced the cat. If you drive at high RPM most of the time or track a lot, then it might be useful, but for daily driving the loss of low end torque is just going to increase your fuel consumption. A couple of other points, the exhaust will sound funny after you replace the cat with a straight pipe, can hear a slightly higher pitch flappy sound like a 2-stroke motorcycle. Also the exhaust smell is very obvious without a cat. If you ever get pulled over by TP, they can definitely "smell a rat" and might decide to impound your car for inspection. If you wanna change your cat, I think it's better to get a high-flow or racing cat as opposed to removing your cat completely.
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