Do I need a cat converter on a 91 festiva?

[myboysherman]

Can I cut out the cat and run a strait pipe with a minimal muffler? Will I have back pressure problems? And will it add any HP?
Eric

[FestYboy]

you may gain slight HP at the top end but you're suggesting something illegal so i don't recommend it. your best bet is to run a larger diameter exhaust tubing and better muffler and if you happen to "accidentally" put a hole in the center of the cat (don't take out all the material) this will help the top end, but you didn't hear that from me.

Arty

[FB71]

It depends on where you live. If you have emissions inspection, then no, its not legal. If you don't have inspections, then go for it. Other than that, ^ he's right on.

[myboysherman]

Louisiana Has No Laws

Thanks, It's legal here. But will I have any back pressure problems?

[FB71]

as long as you keep a muffler on it, no. And I don't mean a glasspack.

[myboysherman]

I do mean a glass pack. What mod do I need for that?

[FB71]

hmmm. I'd say an RX-7 VAF meter, 1.6 or 1.8 injectors, a 1.6 sohc ECU, a 1.6 or 1.8 throttle body, and a decent tuner/dyno shop.

Trust me, bubba. You're not gonna get any big increase in power with that setup. Plus, the 1.3 sounds like crap through a glasspack. Get a decent high flow muffler. Just enough backpressure to keep from melting pistons, and a little deeper tone than a cherrybomb.

[myboysherman]

Ok I'll keep a muffler on it. And bubba seems kinda harce. I'm just asking questions. Thanks for the help.
Eric

[FestYboy]

HA HA you got called "bubba"

[myboysherman]

Did you like the new movie, Nerf Herder?

[FB71]

sorry, slick. wasn't tryin' to insult you. I call everyone bubba. or slick. or easycheese. just somethin' I do.....

[FestYboy]

unfortunately i haven't had the time to see it yet and i want to go w/ my G/F so i had to wait till the weekend anyway (bummer)

[myboysherman]

No Problem. Thanks for the info.

[myboysherman]

Enjoy the film. It could be a lot worse.