southside Member Member 868 Member For: 17y 9m 4d Gender: Male Location: Radelaide.. Real Posted 10/02/10 12:06 AM Posted 10/02/10 12:06 AM hey there!ok I have a question for you all. I had my car in the other day to have my brand new Malwood option 3 clutch put in when my mate whos a high level mechanic said it wouldnt be a bad idea removing the "cat" which he said is resisting a lot of power flow and just drop in a straight pipe where the cat sits. I was wandering what your thoughts were on this option and what the side effects were? I know sound will be a factor but will I need a retune and anythng else if I drop a straight pipe in. also im currently running a 2.5" Xforce exhaust so any info will be appreciated. also any other alternatives and costing as well! cheers guys!
tab Sucker Moderating Team 32,303 Member For: 22y 5m 12d Gender: Male Location: Brisbane Posted 10/02/10 12:13 AM Posted 10/02/10 12:13 AM Most obvious point is it's illegal and can attract a serious fine if you're willing to take the chance.And yeah it'll need a retune
Wenier Legacy Donating Member 1,736 Member For: 16y 8m 19d Gender: Male Location: Christchurch, New Zealand Posted 10/02/10 01:32 AM Posted 10/02/10 01:32 AM Just smash the cat out then it appears to be there. Or rebuild a cat looking thing around a straight pipe, anything to make it look as if its there.
xhxrsix Member 174 Member For: 19y 11m Gender: Male Location: Melbourne Posted 10/02/10 01:33 AM Posted 10/02/10 01:33 AM is there much sound difference/or advantage in having a straight through pipe instead of a bashed out cat?
Guest XR09 Guests Posted 10/02/10 02:47 AM Posted 10/02/10 02:47 AM I have an interchangeable strait through on my bike. For the track. And it makes a lot of difference up in the rev's. You can here the change in note up top too. They aren't mandatory on a bike yet, if they have one on std though they have to have one.
icer Banned 2,335 Member For: 17y 2m 20d Gender: Male Location: Aspendale, Vic. Posted 10/02/10 03:53 AM Posted 10/02/10 03:53 AM you get more drown / flow / power out of a gutted cat. I had one in my car but got EPA'ed. Car was 91db. 90 is legal so had to get a cat and said F**K it and leave it on. Not worth the extra efforts.
Wenier Legacy Donating Member 1,736 Member For: 16y 8m 19d Gender: Male Location: Christchurch, New Zealand Posted 10/02/10 05:54 AM Posted 10/02/10 05:54 AM You probably would be best to just get a high flow cat. Only difference between a straight through pipe and properly smashed out cat is that the cat acts kinda like an expansion chamber in that section but the actual airflow between the 2 shouldnt be too different.
BarKer Member 174 Member For: 17y 19d Gender: Male Location: Newcastle Posted 10/02/10 06:17 AM Posted 10/02/10 06:17 AM To remove the cat or gut it you must be getting pretty desperate.. I think for road cars somethings should be sacred, cats being one of them...
bjc Legacy Donating Member 2,823 Member For: 23y 1m 4d Gender: Male Location: Townsville Posted 10/02/10 06:45 AM Posted 10/02/10 06:45 AM Sacred shmacred! If your on a limited budget and want to take the chance then go for it. Its not like most of our cars pass emissions anyway and if you can poison a few earth loving pedestrians along the way then why not.
southside Member Member 868 Member For: 17y 9m 4d Gender: Male Location: Radelaide.. Real Posted 10/02/10 07:17 AM Author Posted 10/02/10 07:17 AM whats the costs these days for a highflow cat to suite an xforce 2.5 system?
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