exhaust size ?
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500, 472, 425, 368 Discussion, exhaust size ? in Cadillac Engine Technical Discussion; I have a 68 472 I am starting the exhaust on. First of all I want a deep throaty sound, ...
  1. #1
    voodoo is offline Cadillac Owners Member
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    Apr 2004
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    exhaust size ?

    I have a 68 472 I am starting the exhaust on. First of all I want a deep throaty sound, I want to do Flame Throwers on tail pipes, but I also want enough back pressure? Does anybody have any advice? I know flame throwers are hard on engine, but they look cool as hell. pipe size? mufflers? I think I can make a flame thrower using windshield wiper motor welded to HEI shaft and coil and plugs- just add fuel. :coolgleam I love the 50's :coolgleam

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  3. #2
    MMNineInchNails's Avatar
    MMNineInchNails is offline Cadillac Owners Enthusiast
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    Re: exhaust size ?

    Quote Originally Posted by voodoo
    I have a 68 472 I am starting the exhaust on. First of all I want a deep throaty sound, I want to do Flame Throwers on tail pipes, but I also want enough back pressure? Does anybody have any advice? I know flame throwers are hard on engine, but they look cool as hell. pipe size? mufflers? I think I can make a flame thrower using windshield wiper motor welded to HEI shaft and coil and plugs- just add fuel. :coolgleam I love the 50's :coolgleam

    Dual 2 1/4" or 2 1/2" pipes all the way back to two flow masters with flame throwers at the end of the tail pipe. That'll give you backpressure. Smaller the pipe, the more backpressure, but you don't want to choke your engine.

  4. #3
    voodoo is offline Cadillac Owners Member
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    Re: exhaust size ?

    Thanks man appreciate the info. Love your caddy,thats a fine looking car. How can I put a pic on my posts

  5. #4
    voodoo is offline Cadillac Owners Member
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    Re: exhaust size ?

    I put 2 1/2" Flowmasters on it today. I havent went over the rear end or installed the flame throwers yet but it sound really mean Thanks A MILLION > VOODOO

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