what changes could i expect when i take my cat. off my CRX

 

If it is stock, you'll experience a low end loss, smelly exhaust, louder sound, and that's about it. No real benefits. I had to do it once because my CAT was clogged. I punched the cat out, and the car was horrible to drive until I got a 'new' one in there. A stock motor isn't breathing enough air to take advantage of that free flowing of an exhaust IMO.

 

I recently put a stock cat back on my car b/cause of these same problems.

 

so when i put on the intake it will make a diff.

 

it will make a difference when you have a built motor that needs to breathe. power isn't cheap and easy usually

 

A turbo motor will benefit and a built N/A motor will benefit. Its doubtful a motor with simple bolt ons would do anything more than loose drivablity.

 

I am currently running an open header, and while I agree with the "louder" part, I haven't noticed any smell (which, I guess, is unusual).

Please expalin the "low end loss."

 

No back pressure. On a stock motor you just loose torque. I don't have the #s to back that up, so I won't say its a 'for sure' thing, but from the butt dyno, mine lost a ton of drivability.

On the other hand, now that its turbocharged, it gained a lot when I removed the cat. I just depends on how much the motor needs to breathe. A stock motor doesn't benefit from the open exhaust since it's really not breathing enough to even take advantage of a cat back, much less a test pipe and cat back.

You may gain a little top end flow, but over all its a waste of time IMO. .