Be prepared, C-Prepared Autocross (1981 Camaro)

Discussion in 'Project Progress' started by 1981paul, Sep 11, 2008.

  1. 1981paul

    1981paul Moderator Staff Member

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    So after Nationals, the Camaro and I decided that, at least for a bit, we needed to see other people. After putting in some many frantic hours, it was time to take care of the other bits of life that were being neglected.

    But, now it's 2020, and the season starts before I know it. There are a few changes that have already happened (some spring rate related stuff), but the first major task is new mufflers.

    When I ran at Nationals last year I was just over the sound limit. Lucky for me, they weren't DQing folks for sound this time around, but I won't always be so lucky.

    Out with the old (Flowmaster 40 series)
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    So, based on recommendations from Ron Ver Mulm, I went with a pair of Spintech 1000XP mufflers. Evidently they use this type on stadium monster trucks, so hopefully they work for me.

    Because of the, um, unique exhaust routing and mounting, I needed to make a jig off the old mufflers. Once that was made, the new ones were set in place to prep for welding to connect them together, and add mounting points.

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    And, while they aren't in the exact orientation, this is what the piping looks like as it transitions over the driveshaft and out the side of the car.

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  2. Peck

    Peck Veteran Member

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    I love it, once it is finished up you should do a comparison video of the sound difference between the two mufflers.
     
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  3. Lowend

    Lowend Administrator. .a car, a man, a maraca. Staff Member Lifetime Gold Member

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    Those SpinTechs are top-notch. Kinda loud, but compared to a 40-series, that's a relative thing.
     
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  4. C4Racer

    C4Racer Veteran Member

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    X pipe may help too, if you can put that in somewhere.
     
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  5. 1981paul

    1981paul Moderator Staff Member

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    Thanks! I already have one in the typical location. Just trying to get a little more “muffled.”
     
  6. C4Racer

    C4Racer Veteran Member

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    Almost anything is better than a Flowmaster 40 series. I had them on my car when I got it and it may as well have been open exhaust. 520hp 406 here. It's so much better with an X pipe and Magnaflows, even with larger tubing. Pretty mellow for a large cube high hp motor really - it's not bad at all - especially at cruise. I think you will be happy.
     
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  7. Randy 81

    Randy 81 Veteran Member

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  8. 1981paul

    1981paul Moderator Staff Member

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  9. 1981paul

    1981paul Moderator Staff Member

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    Brackets and mounts tacked in place. The jig looks like it worked so far.

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    They should go in the car tomorrow for a test fit, then final welding.
     
  10. 1981paul

    1981paul Moderator Staff Member

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    Well the jig worked perfectly.

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    Even the exhaust tips line up as they should.

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    I am going to replace the 90 degree bend into the muffler to make that fit a little better, but then it's done.

    One more thing off the list. Dixie is fast approaching.
     
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