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Thread: Question about Removing the Cat's

  1. #1
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    Question about Removing the Cat's

    I Have the Reinhart Cobra Exhaust system on my Marauder. I was thinking of removing the cats and was wondering if their is anything to be gained or lost by doing so? Also was wondering if anybody has done a Dyno before & after on this too ?

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    Dont remove them.
    The loss of backpressure will kill your torque.

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    Take off the Mufflers too!

    you will have better flow thru the exhaust, less restriction.

    While your at it take off the mufflers too

    I have heard that the mufflers alone are good for 16 HP

    As a guess I would say 20+hp if you remove the cats and mufflers

    what the heck, its florida, and we can do this if we want to......
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    Quote Originally Posted by Zack View Post
    Dont remove them.
    The loss of backpressure will kill your torque.
    I was told you gain HP and Loose some torgue. I was wondering if anyone has done a dyno on before and after?

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    Quote Originally Posted by greggash View Post
    you will have better flow thru the exhaust, less restriction.

    While your at it take off the mufflers too

    I have heard that the mufflers alone are good for 16 HP

    As a guess I would say 20+hp if you remove the cats and mufflers

    what the heck, its florida, and we can do this if we want to......
    At that point....why not just get cut-outs?????

    KillJoy

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    TMF had a b4 and after dyno with the cutouts and no gain in power.

    Without cats, the car will be obnoxiously loud.
    Ride in my car, it has cats and mufflers, but the most free flowing pieces available.
    It sounds like a big block, from 5 miles away!

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    Quote Originally Posted by greggash View Post
    you will have better flow thru the exhaust, less restriction.

    While your at it take off the mufflers too

    I have heard that the mufflers alone are good for 16 HP

    As a guess I would say 20+hp if you remove the cats and mufflers

    what the heck, its florida, and we can do this if we want to......
    So your sayinmg if I leave the cats and take out the muffles I can gain 16 HP ? I never heard that before. That I wouldn't do.

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    Quote Originally Posted by Zack View Post
    TMF had a b4 and after dyno with the cutouts and no gain in power.

    Without cats, the car will be obnoxiously loud.
    Ride in my car, it has cats and mufflers, but the most free flowing pieces available.
    It sounds like a big block, from 5 miles away!
    And what cats and mufflers are you useing?

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    I wouldnt worry about the loss of tq on a blown car. I would check on the mach 1 board for dynos of an auto mach with a catted x and with an o/r x. That is probably the closest numbers you will find. Cutouts vs an o/r pipe are not exactly the same so I would take that with a grain of salt.
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    Quote Originally Posted by Cobra25 View Post
    I Have the Reinhart Cobra Exhaust system on my Marauder. I was thinking of removing the cats and was wondering if their is anything to be gained or lost by doing so? Also was wondering if anybody has done a Dyno before & after on this too ?
    should have gone with kooks full system-some day you might beat me

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    Quote Originally Posted by John Nero View Post
    should have gone with kooks full system-some day you might beat me
    John, don't eg him on now....
    Empty Garage, but Fat bank account

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    Quote Originally Posted by John Nero View Post
    should have gone with kooks full system-some day you might beat me
    John I will never beat you. Your Car is just too fast!

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    Quote Originally Posted by Zack View Post
    Without cats, the car will be obnoxiously loud.
    Ride in my car, it has cats and mufflers, but the most free flowing pieces available.
    It sounds like a big block, from 5 miles away!
    I have heard this car, driven behind this car, been passed by this car. Yes it is obnoxiously loud. It is the perfect exhaust for Zack


    KillJoy

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    All kidding aside now, is their any info on Dyno results on this ? Or has anybody else done this already or tested it them selves?

  15. #15
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    I am cutting my cats out so I can run C-116 race fuel for the race tune. QTP electric cutouts are also being installed for open header race applications. I have SW long tubes going through an X pipe with Flowmaster Delta 50's and will find our next week how much louder the car will be. Hopefully not too much louder. I have heard Mustangs with the cats out and good mufflers. Wasn't too loud for me. Loss of torque shouldn't hurt my application. My .02
    Last edited by MarauderTJA; 01-09-2007 at 04:15 PM.
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