catalytic converter

[pong]

what happens when u remove the catalytic converter of the car?

would u accelerate faster or not?

what are the significant changes?

thanks!

[Kalevera]

You **** up the environment quicker.

[shogun]

And you will have a problem with the engine management. Because the ECU needs those data to adjust fuel/air ratio.
Just trying to solve a problem on a car of someone from Canada which is living here in Japan. He imported an after market cat from Arizona, which does not have a temp sensor at the end of the cat and no thread for this. But his car has a temp sensor. So the sensor always gives a singnal to the ECU that the cat is cold. Correspondingly it adjusts the paramaters. And that is a V12 M70 engine. The other side has the temp sensor in the original cat and gives of course different values. And on the M70 engine there are 2 MOTRONICS. You can imagine how 'nicely' the engine runs at the moment.
I will have a look on it Saturday to solve the problem.

[George Davis]

Any increase in acceleration would be so slight that you'd never notice it (except maybe for the "placebo effect", where one's car "seems" to be faster after any so-called performance mod, oil change or wax job).

Modern cats don't create much back-pressure, and I'd bet that the back-pressure of the entire stock exhaust isn't very high. BMW had to do something to squeeze 189 hp out of 2.5 liters :) , so they probably looked there, too.

Keep the cat, it's a good thing and isn't robbing any power.