i have been thinking about hollowing out my catalytic converter but i am not sure that my check engine light will come on if i do. also, is there such thing as too little back pressure. thanks for the help
i have seen the Catco cats. but i have heard they are no better than the ones you can buy at a muffler like the one i got my work done at. and they are cheaper, i am going to get one put back on mine and 2 o2 sensor, it is to loud, what do you goes think about glasspacks???dj petey said:Be wary of so called "hi flow cats". These are just overpriced cats that can be had for half the cost. The determinents of flow are frontal surface area, length and density. Almost all after market cats have a density of 400 cells per square inch. Even the smallest aftermarket cats have flow ratings for engines up to 3L. The next universal size handles motors up to 7L and the largest handles motors up to 10L. Each one is physically larger than the next, which is what is determining their flow. Companies like Monza, Random Tech, etc... are just selling you 7L cats($100-$180) for your small displacement import engine. This same cat, from Catco, can be had for $60-$70 at jcwhitney.
the sound will not change? maybe it was all those racing stickers i added when i hollowed mine out...j/k...LMFAO!!!!Woodnutz said:Number one I don't think that your car will produce enough horsepower to worry about the back pressure. Hollowing out your cat will probably not hurt. I mean if you have a free flowing exhaust how can that not help. The sound will not change that much unless you have a muffler or bigger pipes.
properly tuned??? for fuel efficiency, emmisions and attenuation maybe...dj petey said:Removing the cat or hollowing it out, lengthens the effective third section and may harm the resonance and scavenging effects of a properly tuned exhaust.