LS3 bits and pieces

[deano59]

Originally Posted by sambo

Yep cats - I read that in a few places when I was researching my setup. Stick with the ceramic factory cats from a VZ, VE or even late model Falcon. The metal substrate ones, particularly with less than 400 cpi, while they flow and sound better don't do the same job for the environment. Hence why many aren't ADR approved.

im glad i kept the cats for just in case off the ve i wrecked now the bloody things might come in handy after all .

[damage]

Originally Posted by deano59

im glad i kept the cats for just in case off the ve i wrecked now the bloody things might come in handy after all .

Not necessarily, trust me the money you spend on new cats could be worth more then the headaches by using old ones.

Cats, dependent on what standard they were designed to meet, will only be efficient for their design life. If they have done a heap of kms then chances are they wont filter out what they are suppose to. Basically what I found out was the higher the design requirement the better the filter they were because they were designed to last longer.

Other area that people overlook is the exhaust sensor. If the sensor is old it will not be as reactive and therefore adjustments in engine management wont happen as quick.

If you want to pass emissions with flying colors new cats (euro 6 are good) new sensors and get a fuel that is close to the ADR test fuel.