Originally Posted by dubcac
Where did I ever say it was the right way, or that I'd do it? Where did I say it wasn't ghetto? You're not getting me here. It works, it's a trick to get around running a chip/o2 sim for a little while to tide him over and get that CEL off. BTW, the REAL way to fix it isn't by running an O2 simulator either.
I'm not trying to put words in your mouth. I'm simply stating a fact. If this test pipe does not have an O2 bung, then the O2 sim is a good solution. The post cat O2 sensor checks for catalytic converter efficiency and it does not control the air fuel ratio. BTW... I thought you can't program an OBDII car? So what is the REAL way to fix it?
I really doubt if any gains will be made with the use of a test pipe anyway on such a small displacement engine. It needs some back pressure. I would say that some torque would be lost if anything. Louder is not faster.
If his old cat was bad, than yes... the car would pick up some power.