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To go with a cat or not??

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  • To go with a cat or not??

    Will taking my cat off make my exhaust sound any different or raspier? currently I have 2.25" catback with a 30" thrush glasspack and a Magnaflow straight through muffler and I'll have a OEM header installed as well.

    And some guy over a Saturnspot said that he experienced "flames" coming out of his muffler because he was running so rich w/o a cat. Can this ever happen?


    Thanks

  • #2
    It'll sound like ass. Leave it on.
    - Justin [s]99 Blue SL2 - T3/T4 14psi[/s] (dead)


    FS: Pimped lower trans mount, TiAL 38mm Wastegate, Gauge Cluster, Oil Drain

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    • #3
      What if I went with something like this? They're reccomended by the LS1 community.

      http://cgi.ebay.com/ebaymotors/2-25-...61676919QQrdZ1

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      • #4
        A high flow would be your best option. I'm not sure who makes the best one, or where you should buy it, but you definitely WANT a cat.
        - Justin [s]99 Blue SL2 - T3/T4 14psi[/s] (dead)


        FS: Pimped lower trans mount, TiAL 38mm Wastegate, Gauge Cluster, Oil Drain

        Comment


        • #5
          i've heard several cars without cats. some sound bad, some sound good. depends on the rest of the exhaust

          running without a cat doesn't make your engine richer (i think. it might possibly screw with some sensors and cause that) but i know it does make your exhaust richer, because the cat helps get rid of unburned fuel and other junk.

          and ask vinny about flamage
          94 SC2, manual, the whore that won't die
          96 SC2, auto, 146k, wife's car
          96 Formula, LT1, T56, T-tops, gas guzzling whore

          Malo Periculosam Libertatem Quam Quietum Servitium

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          • #6
            Originally posted by ace729
            running without a cat doesn't make your engine richer (i think. it might possibly screw with some sensors and cause that) but i know it does make your exhaust richer, because the cat helps get rid of unburned fuel and other junk.
            I wasnt saying that running without a cat would make the engine run richer, but because cat gets rid of unburned fuel thats why I asked if it would cause flames to come out of the exhaust or not.


            Heres the original thread I was talking about. I guess he had a high flow cat, and Scotty experienced them as well...

            http://www.saturnspot.com/forum/view...t=cat&start=12

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            • #7
              My Ecripse doesn't have a cat and it sounds like shit.
              Got a new baby <img src="{SMILIES_PATH}/smile.gif" alt="" title="Smile" /> - 2006 Ion Redline Stage 2<br /><br />Old baby :<br />--My ride : http&#58;//www&#46;cardomain&#46;com/ride/405827

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              • #8
                Re: To go with a cat or not??

                Originally posted by 93 Saturn SL2
                And some guy over a Saturnspot said that he experienced "flames" coming out of his muffler because he was running so rich w/o a cat. Can this ever happen?
                sorry, i assumed you were asking about both things there.

                but yeah, running without a cat means flames are a definite possibility. which depending on what you want could be considered "very cool" for you or rightly so, usually an annoyance.

                and now i have a question about tailpipe flamage on our cars...we are plastic. would the flames be enough to melt the bumper?
                94 SC2, manual, the whore that won't die
                96 SC2, auto, 146k, wife's car
                96 Formula, LT1, T56, T-tops, gas guzzling whore

                Malo Periculosam Libertatem Quam Quietum Servitium

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                • #9
                  I have experienced the flamage :twisted:

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                  • #10
                    Originally posted by detroitbass
                    My Ecripse doesn't have a cat and it sounds like shit.
                    because its an eclipse

                    dsm ftl
                    Originally posted by ECOtec Gods
                    Consider this: 800 hp is a lot on a 2.0L motor. With 750hp, three-quarters of a thousand you're basically dealing with 6.14 hp per cubic inch. Pressures and stresses of all kinds thermal and mechanical loading across the board escalate to extreme levels. A Chevrolet 5.7-liter LS1 V8 with this much specific power (horsepower per cubic inch) would be making 2,137 hp

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                    • #11
                      Originally posted by AC66Bronco
                      Originally posted by detroitbass
                      My Ecripse doesn't have a cat and it sounds like shit.
                      because its an eclipse

                      dsm ftl
                      oh ok, how foolish of me [img]{SMILIES_PATH}/rolleyes.gif[/img]
                      Got a new baby <img src="{SMILIES_PATH}/smile.gif" alt="" title="Smile" /> - 2006 Ion Redline Stage 2<br /><br />Old baby :<br />--My ride : http&#58;//www&#46;cardomain&#46;com/ride/405827

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                      • #12
                        Originally posted by d3ad1ysp0rk
                        It'll sound like ass. Leave it on.
                        not if the exhaust is a decent setup, it'll just be louder

                        on most, it will make it louder and higher pitched, but not all

                        you can get a flame out of a car with a cat, just has to be rich enough and flow enough. it's just more evident with no cat from less restriction. I know Geo does it when on it. mine does, a lot more often when under nitrous. it used to before though out the exhaust bypass when I did have the cat from the rich mixture.

                        I would suggest a small glasspack in place of the cat, so you've got something to quiet down the sound without the restriction.

                        I was suprised, mine just got louder but doesn't sound nearly as bad as I thought, still smooth too, but then again that's mainly from the exhaust system.
                        -Vinny

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                        • #13
                          On my old focus it did'nt sound bad at all just loud. It all depends on you exhaust if you have a good muffler and resantor. My old exhaust was a full 2.25 exhaust, flex pipe and a race header with no cat.

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                          • #14
                            It also makes your exhaust smell like shit.

                            just run it, it's $50.
                            -2002 Saturn SC2 - Clean, slow, low daily
                            -2008 Saab 9-7x Aero
                            -1996 Suzuki Bandit 750 swapped
                            -1998 VW Golf GTI VR6 Mid Engine LeMons car
                            -1986 RX7 - 275whp @ 10psi

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                            • #15
                              Back when I had my other saturn I had a 2.25 cat back and a magnaflow muffler and no resonator, when I cut the cat off it was a good bit louder but it still sounded good.
                              1998 SL2a White Daily Driver- Groundpounder,Billet Dog Bones,Short Ram Intake,OBX Header,Thermal R&D Cat Back,SAFC 2,Fiber Images Hood

                              1993 SC1m Black Project Car-On hold

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