cat Killer

[HRthirtyone]

i have heard that replacing the cat converter with a pipe or even gutting it will give better spool up because of less restriction.... (most ppl know this) about 4 years ago when i had an r31 non turbo a guy at an exhaust shop told me that if i removed it my engine would blow up!!

I know this is ludacris but are there any side affects of removing the cat???

i ask this, because my old n/a r31 ran like a pig without the cat (maybe not enough backpressure)

[Cake]

it will give better spool up, and you may notice a slight power increase without the restriction of the cat converter. it is illegal though for street use, and the fumes are quite bad running without the cat converter, you dont wanna breathe that stuff in . you will also get black particle shit all over your rear bumper.

[C_DawG]

Future generations will have no testicles!!

[Bill]

Years ago I ran my ole VL Commodore without a cat after a nasty incident involving a cattlegrid. (ripped the whole exhaust off from the bottom of the headers.)

Idle was a bit rougher, less power down low but once the revs built up a bit there was shitloads more power.

Also sounded great in underground carparks

[GTS-t VSPEC]

I have no cat, and haven't had any problems. Much better spool up. I don't sniff the exhaust fumes though, so I'm not sure if there deadly:bahaha:

[Duncan]

Since there is an EPA fine of around $10,000 for running without a cat, I think you'll get more bang for your fine with a 100hp nitrous shot for the street.

[Roy]

Use the catalytic converter, authorities are only going to crack down on us harder if modified car owners remove them for perhaps a 2-5kw improvement.

We all stopped using CFCs as they harmed the environment/ozone, what do you think an unleaded car without a cat does?

[HRthirtyone]

FOR suuuure, yea i will run the cat on the streets as i will only take it out to get "high" off the fumes.......

[T0nyGTSt]

If you REALLY want to do this... get a fake cat made up. ie. put a steel tube in the cat body, fill the cavity with sand.

I've followed some of you guys on Syd. cruises and it's patently clear some of you do not run cats

T.

[slip]

Just run the cat, unless its a track/racecar.

[R34GTT-R]

just hammer all the honey comb shit out

[WazR32GTSt]

Originally posted by R34GTT-R

just hammer all the honey comb shit out

this is the easiest method. make sure you get it all out though otherwise some will fall out while you are driving... i know from experience ...

[Gav]

And I though that the honeycomb in the cat was solely to stop GTR ceramic terb wheels from going through the windscreen of tailgaters trying to keep up!!