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  1. #1
    Join Date
    Oct 2012
    Posts
    283

    Default Exhaust Fabrication

    Putting this new (at least new to me) car together. The headers are Schoenfeld 1186V, the track requires a cone muffler like the Dynatech Vortex Cone.

    What is the best way and how is everyone doing their modified exhaust these days? Just weld the cone in the collector and weld a turn-down to that and let it dump? OR take the time and effort to build/fabricate something that goes almost back to the rear wheels.

  2. #2
    Join Date
    Nov 2009
    Location
    Watertown, Wisconsin
    Posts
    98

    Default

    I always get the exhaust as long as the rules will allow. You will gain more torque and not lose any top end power.

  3. #3
    Join Date
    Feb 2008
    Location
    Plainfield, IL
    Posts
    425

    Default

    Those 1186V Headers come streight out on the left side so unless you cut a hole on the body you will need a turn down. Headers dont last long on dirt cars so the less I can expose to get damaged, the longer they last. Just weld it in the collector and tack a turndown on it you run them, If you do extend them, do the same length on both sides to keep the scavange balance.

    Dave
    2012 UMP Stock Car National Champions.
    2013 UMP Modified Rookie of the Year
    2014 Kankakee Speedway UMP Modified Champion
    2016 Fairbury American Legion Speedway UMP Modified Champion
    2016 Kankakee Speedway UMP Modified Champion
    2016 UMP Modified, Northen IL Regional Champion
    2018 UMP Modified, #2 National Points Standings
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  4. #4
    Join Date
    Aug 2007
    Posts
    146

    Default

    ive always bolted my vortec mufflers in, 1/4" bolt on each muffler flange. use a true lock nut, not a nylon lock nut.

  5. #5

    Default

    X2 on the 1/4 in bolts. No need to run any thing on the right side, but you can run a turndown on the left. My opinion is the more stuff you have hanging off the end of the header the greater the chance of the header breaking.
    It'll be fine

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