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Putting cats back on - tune?

Posted: Thu May 15, 2014 12:32 pm
by Goose17
Hello all,

I'm buying a 93 that has the cats removed and aftermarket mufflers. The stock stuff is coming with the car and I plan to put it back on. My knowledge base is with the newer cars (I have a Terminator and a GT500). With the newer stuff, you have to tune for removal and reinstallation of the cats. What about the 93? Can I just put them back on?

Thank you in advance.

Re: Putting cats back on - tune?

Posted: Thu May 15, 2014 1:44 pm
by Z282SLO
I used to remove and replace the stock H-pipe on my '89 GT without any tuning issues. I'm guessing the '93 Cobra is no different.

Re: Putting cats back on - tune?

Posted: Thu May 15, 2014 1:46 pm
by Goose17
Z282SLO wrote:I used to remove and replace the stock H-pipe on my '89 GT without any tuning issues. I'm guessing the '93 Cobra is no different.
Thank you for the reply!

Re: Putting cats back on - tune?

Posted: Thu May 15, 2014 2:35 pm
by Kryckter6911
Goose17 wrote:
Z282SLO wrote:I used to remove and replace the stock H-pipe on my '89 GT without any tuning issues. I'm guessing the '93 Cobra is no different.
Thank you for the reply!
Any details on the car you are buying? I recognized your username from the GT500 forums that I frequent! Welcome to the 93 club as well!

Re: Putting cats back on - tune?

Posted: Thu May 15, 2014 2:45 pm
by Goose17
Kryckter6911 wrote:
Goose17 wrote:
Z282SLO wrote:I used to remove and replace the stock H-pipe on my '89 GT without any tuning issues. I'm guessing the '93 Cobra is no different.
Thank you for the reply!
Any details on the car you are buying? I recognized your username from the GT500 forums that I frequent! Welcome to the 93 club as well!
Not ready for details yet. I'll post info when it's mine. Thanks for the welcome.

Re: Putting cats back on - tune?

Posted: Thu May 15, 2014 2:59 pm
by 1986Browns
Just throw the stock stuff back on. OBDI is more "forgiving" than OBDII as far as emissions control functions are concerned.

Re: Putting cats back on - tune?

Posted: Thu May 15, 2014 4:53 pm
by Goose17
1986Browns wrote:Just throw the stock stuff back on. OBDI is more "forgiving" than OBDII as far as emissions control functions are concerned.
Thank you sir!

Re: Putting cats back on - tune?

Posted: Thu May 15, 2014 5:00 pm
by 93svt#2779
I purchased my cobra with OR h pipe installed. Mine also came with the original cats. I put the catted h pipe on, ran down to emissions about 6 miles, passed no problem, went back home and put the OR pipe back on.
My car had no issues other than loss of power! :drive:

Re: Putting cats back on - tune?

Posted: Thu May 15, 2014 6:09 pm
by Goose17
93svt#2779 wrote:I purchased my cobra with OR h pipe installed. Mine also came with the original cats. I put the catted h pipe on, ran down to emissions about 6 miles, passed no problem, went back home and put the OR pipe back on.
My car had no issues other than loss of power! :drive:
Definitely can't do that with the newer stuff. Even after a swap and tune revision, you can't just run right down and pass emissions. It's nice the older stuff is so easy.

Re: Putting cats back on - tune?

Posted: Thu May 15, 2014 6:37 pm
by Z282SLO
93svt#2779 wrote:My car had no issues other than loss of power! :drive:
And that very muffled V8 sound! :cry:

Re: Putting cats back on - tune?

Posted: Thu May 15, 2014 7:27 pm
by 93svt#2779
Z282SLO wrote:
93svt#2779 wrote:My car had no issues other than loss of power! :drive:
And that very muffled V8 sound! :cry:
So true! :yuck:

Re: Putting cats back on - tune?

Posted: Thu May 15, 2014 8:13 pm
by Goose17
My Shelby is the crazy car. 750 crank hp with Borla-S and it's a lot of fun. My Terminator is all stock and will be staying that way and I want the Cobra totally stock too.

Re: Putting cats back on - tune?

Posted: Thu May 15, 2014 9:15 pm
by 1986Browns
Goose17 wrote:My Terminator is all stock and will be staying that way and I want the Cobra totally stock too.
Self control.

You have a lot of it. :biggrin:

Re: Putting cats back on - tune?

Posted: Thu May 15, 2014 9:55 pm
by Z282SLO
1986Browns wrote:
Goose17 wrote:My Terminator is all stock and will be staying that way and I want the Cobra totally stock too.
Self control.

You have a lot of it. :biggrin:
Much easier to do when you have a 750hp GT500 to play with. ;)

Re: Putting cats back on - tune?

Posted: Fri May 16, 2014 12:44 pm
by buddha
Bolt it up and go.

Saw you and your car at Shelbyfest, nice ride. I live about 25 minutes from Herman and try to make it, sans rain.