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Cats Or No Cats ???

This is a discussion on Cats Or No Cats ??? within the External Engine forums, part of the LSx Technical Help Section category; Hey Guys , I've Read A Lot On The Forum About Exahust Smell When Running W-out Cats I Was Wanting ...

  1. #1
    Member TRANS-DAD's Avatar
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    BLACK
    2001 T/A VERT.

    Cats Or No Cats ???

    Hey Guys ,
    I've Read A Lot On The Forum About Exahust Smell When Running W-out Cats I Was Wanting To Run Headers & Ory But Dont Want To Smell Exahust Can A Good Tune Fix This Or Just Go Hi Flow Cats???

  2. #2
    Senior Member splitfinger09's Avatar
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    Bright Rally Red
    2000 Camaro SS #5075 M6

    I have been running no cats for about a week now. When I'm moving I never smell anything and the only time I smell exhaust is when I start it up in the garage. I hear a good tune can have your engine running just as clean as if it had cats.

  3. #3
    Member TRANS-DAD's Avatar
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    BLACK
    2001 T/A VERT.

    Yeah, I Think Its About The Tune Also
    I'll Prob Just Go Ory
    Thanks For Input!!

  4. #4
    cutting and welding mark21742's Avatar
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    hugger orange
    2004

    by changing to an aftermarket exhaust with no or high flow cats you accually change your a/f ratio slighty. the fuel smell you get is really your car running slightly lean....odd, yes I know lol

    a tune will fix the problem... I have LT's and 3" duals with no cats and I have no fuel smell
    hope that helps

  5. #5
    Member TRANS-DAD's Avatar
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    BLACK
    2001 T/A VERT.

    Yeah, Thats What I Hoped To Hear
    Thanks For Yhe Input!!

  6. #6
    Approver of Threads SpecterGT260's Avatar
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    Blacked out
    '98 Trans Am

    without cats your emissions will actually change drastically..... a tune will help some... but wont entire fix the problem. However, near stock you wont produce enough to make YOU smell, and it would only be at idle anyways. with my car since i have a ton of overlap on my cam my gf tells me every once in awhile that I smell like fuel.

  7. #7
    Impounded
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    NBM
    99 z28

    ive had no cats for a couple months now and have had no smell.

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