if i run an exhaust cut out before my cat on my 89 tbi, will i trip any codes on my computer?

or do i need to run it after my cat?

john

 

It will be fine. I run a cut-out and No cat.

Having it open will lean things out, as it cuases the exaust to scavange the cyls better. If you have the ability to tune, you might need to richen things up a hair.

 

so did you just put a cutout in place of your cat?

john

 

yes

 

did you go ahead and get a 3" c/o or did you go with 2 1/2"? any pics?

john

 

http://www.cardomain.com/id/dewey316

Pictures can be seen there. It is 3" because I have a 3" catback, and 3" Y-pipe. I flanged everything, so my cat is a bolt-in switch now.

 

nice, i like the interchangeability for smog purposes. good idea. i could probably do that with a straight pipe and keep some backpressure on the system and sound better going through my flowmaster, huh. any sound clips of your cutout?

john

 

I'll put one up tonight. I had taken it down for a while. When I get home, I'll toss it back up on my webserver.

 

I will add, my car will sound diffrent than yours will, Mine motor is cammed, so it has quite a diffrent sound that a stock LO3

 

what is that cam that you said is for sale on your car domain site?

 

I need to change that. It is not for sale anymore. Its in the car for time being.

 

ok.....

CLICK HERE for a link to a quick video so you can hear the cut-out.

 

sounds decent.

john

 

No codes here either, works great, sounds awesome