cats

[Macka21]

im thinking bout taking my cats off and smashing the middle out of em so there not restrictive.. has anyone done this? and did u notice improvement?

[hakhawk]

go out and buy a high flow cat. otherwise, bash it out, then go park in front of a police car, and let them send your car off to the epa, where they can issue you a nice big fine for having a bashed out cat.

[Macka21]

high flow cats are restrictive and besides they dont do emission test in whyalla anyways

[hakhawk]

what sort of motor is this for? high flow cats tend to be more than enough for any street driven car

[dufus]

high flow cats are restrictive and besides they dont do emission test in whyalla anyways

no but they can make you travel to Adelaide for one.

[stocky]

i dont think the RSPCA will be too happy about you doing that to a cat

[Macka21]

its gonna be on my vy s2 spack

[vn calais manual]

high flow cats are restrictive and besides they dont do emission test in whyalla anyways

whyalla? im from whyalla to. do i know you lol. :\

[Macka21]

dunno wats ur name bro

[vn calais manual]

also to contribute to the thread, .

your car looks like a stock vy, probably v6, you will have next to no gain by bashing them out . get some high flows from paul jagt (jagt muffler). slightly expensive yes, but beats a 10,000dollar fine. :P



lachlan mcomish

got a panther mica vs clubsport parked on elliott street every day.
and a white and silver vn calais.

[stocky]

s pack. so its a v6? what on earth are you doing to the engine that makes a high flow cat restrictive?

[Macka21]

wats ur name bro

[hakhawk]

lachlan mcomish

got a panther mica vs clubsport parked on elliott street every day.
and a white and silver vn calais.

wats ur name bro

he already posted it

[Macka21]

i havent done anything to the engine the stock cats are restrictive. high flow cats r still restrictive

[hakhawk]

so is the stock 2.25" exhaust system, why not just rip the whole system off while you're under there?

any cat converter is going to be restrictive to a point, it does have a job to do

[vn calais manual]

there are far more restrictions on your standard motor to even think about changing cats yet .

get yourself an air intake, some good leads, and a 2.5" exhaust catback. the cat still will not be restricting it at this stage .

[Macka21]

im getting an exhaust next week or the week after, i have put a hole in the air box with a 90 degree elbow to suck from behind the headlight. u reckon the leads

[DARK SIDE]

Not sure how true it is but in an issue of street commodores no.145 it said the fines for a knocked out cat were up to 33 thousand dollars in NSW. Your probably looking at 300 bucks each for a decent hi flow so its money well spent.

[vn calais manual]

im getting an exhaust next week or the week after, i have put a hole in the air box with a 90 degree elbow to suck from behind the headlight. u reckon the leads

youve already got a start, go for a high flow air filter also, something like a lukey dry or a k&n oiled, both are good, and get yourself a set of topgun leads.

i honestly wouldnt worry about getting highflow cats just yet, and i wouldnt even consider knocing the guts out with a screwdriver at all.


once your exhaust is done, a decent air filter, and some nice leads, you can then look at extractors and cats.

[Macka21]

yeah i got a high flow filter k&n oiled filter

[SAV_117]

i wouldnt rise bashing out the CAT u say your in whyalla and u think u wont get done ok fair enough but your telling me your not gonna travel to adelaide at some point or anywhere else and if you get done massive fine bro

[Emackulation]

Main thing about bashing out a cat converter is that it sounds CRAP afterward. If you want to amplify the shitty v6 sound and make it "tinny" then go ahead.

[Not_An_Abba_Fan]

i havent done anything to the engine the stock cats are restrictive. high flow cats r still restrictive

How did you come by this little piece of info?

Restrictive how? You just looked inside it and said "yep...restrictive"?

A stock cat has more than enough flow for a stock engine. A hi flow cat will outflow most modified and FI set ups.

[jet-6]

Can someone also please explain to me how changing HT leads(considering there is nothing wrong with the stock ones) will improve power?

[Not_An_Abba_Fan]

Unless you have very high voltage output coils, the stock ones will work fine.