Fabricating Headpipes, Dual Exhaust w/ X Crossover for Poly 318 in 1964 Wagon at Home

Mopar Exhaust Systems

  1. Evan Frucht

    Evan Frucht Well-Known Member

    Messages:
    122
    Likes Received:
    25
    Joined:
    Sep 3, 2018
    Location:
    Los angeles
    Local Time:
    12:43 AM
    I've started to replace the tired exhaust in my 1964 Fury station wagon. I picked up the car recently and am trying to get the car on the road for now. Its rough and needs some body work and interior but that will come in a couple months when I have more time. Done a lot so far to make it road worthy... rebuilt the carb as well as general tune up maintenance, fixed some wiring, working on making the dash cluster fully functional (almost there just need to get the speedo hooked up and get the clock and lights working). Last time I took it around the block to test the kickdown I heard a loud bang which must of been the exhaust tubing basically bursting, or it could of been a backfire who knows but upon closer inspection my "hole" exhaust was rusted out and cracked open really badly in one spot almost in half... Which brings me to this project...

    I put the car up on 4 ramps to give me a little space to work.

    20181118_094959.jpg 20181118_094919.jpg

    One of the first issues I ran into was that the passenger side exhaust manifold dumps out in a very inconvenient location for pipe routing. Its very tight area. I needed to make a head pipe which would clear the oil filter and trans bracket and also give enough clearance for the tie rod to move back and forth.

    after a lot of trial and error I came up with this...

    20181116_151813.jpg 20181116_151830.jpg 20181116_151834.jpg 20181116_151839.jpg 20181116_154714.jpg 20181116_155700.jpg 20181116_151335.jpg 20181116_151437.jpg

    It's not the prettiest, or "best flowing" one might argue, but I think it will work well. I kept the welds from getting into the inside too much. I stepped it off from the original flanges which I decided to reuse. I had to dent/shape one part of it because it was hitting the trans bracket. probably would of cleared it and been easier with 2.25" pipe but I ended up with a bunch of 2.5' mandrel bent tube … long story.

    time to start on the other side!
     
    Last edited: Nov 18, 2018
  2. 66383

    66383 FBBO Gold Member FBBO Gold Member

    My Photo Garage
    Messages:
    582
    Likes Received:
    375
    Joined:
    Jan 19, 2018
    Location:
    calvert city, ky
    Local Time:
    2:43 AM
    Making progress!!
     
  3. Coronet 500

    Coronet 500 Well-Known Member

    Messages:
    389
    Likes Received:
    107
    Joined:
    Mar 23, 2010
    Location:
    Ontario
    Local Time:
    3:43 AM
    If we all had lots of money we would all be driving show cars. If it works and won't break I say good job, that"s what hot roddin' is all about.
     
  4. Evan Frucht

    Evan Frucht Well-Known Member

    Messages:
    122
    Likes Received:
    25
    Joined:
    Sep 3, 2018
    Location:
    Los angeles
    Local Time:
    12:43 AM
    Did the driver side manifold pipe today. It was easier than the other side with less things to avoid. I still needed to make sure I cleared the starter, trans control cable, and oil cooler lines.

    20181118_150942.jpg 20181118_150955.jpg 20181118_155830.jpg 20181118_180512.jpg 20181118_180538.jpg 20181118_181043.jpg 20181118_181111.jpg 20181118_181225.jpg
     
    Last edited: Nov 19, 2018
  5. Evan Frucht

    Evan Frucht Well-Known Member

    Messages:
    122
    Likes Received:
    25
    Joined:
    Sep 3, 2018
    Location:
    Los angeles
    Local Time:
    12:43 AM
    also made a little more progress on the other side too
    20181118_203042.jpg 20181118_203047.jpg 20181118_203056.jpg 20181118_203119.jpg
     
  6. Evan Frucht

    Evan Frucht Well-Known Member

    Messages:
    122
    Likes Received:
    25
    Joined:
    Sep 3, 2018
    Location:
    Los angeles
    Local Time:
    12:43 AM
    Was able to get some work done yeserday evening, have been too busy with other things unfortunately but hopefully will get some more free time soon to work on this project. Made more progress on the passenger side manifold/head pipe. Got it to run all the way to the notch in the frame. BTW all of this was done with zero welding under the car. Lot's of trial end error but it is easily do-able.
    20181128_201101.jpg 20181128_201110.jpg 20181128_201130.jpg
     
  7. 5.7 hemi

    5.7 hemi FBBO Gold Member FBBO Gold Member

    Messages:
    10,306
    Likes Received:
    5929
    Joined:
    Dec 21, 2008
    Location:
    ca
    Local Time:
    2:43 AM
    Just curious as to why your using such a small tube then stepping up?
     
  8. Evan Frucht

    Evan Frucht Well-Known Member

    Messages:
    122
    Likes Received:
    25
    Joined:
    Sep 3, 2018
    Location:
    Los angeles
    Local Time:
    12:43 AM
    For a few reasons,

    Because I don't think the larger 2.5" pipe would of been able to attach to the manifold flange without being to too wide. It would interfere with the surface directly surrounding the mounting holes where the bolts/or nuts need to sit flush. it is also very tight in that area and the smaller pipes gave more clearance to avoid various cables, oil filter, trans bracket, etc... it made my life easier so I wasn't too worried about it.

    The way I see it its just extending the manifolds a few inches because the exhaust gasses are restricted to that size anyway while its leaving the manifold... what does an extra few inches hurt.

    I also believe that there is something to be said for small tubing which allows exhaust gas to exit quicker, at a higher velocity. yes bigger tubes "flow" more because of volume, but if your engine isn't burning enough gas the exhaust will get scavenged (leave the exhaust system) slower with big pipes.
     
    Last edited: Dec 7, 2018 at 4:01 PM
    • Thanks! Thanks! x 1
    • Evan Frucht

      Evan Frucht Well-Known Member

      Messages:
      122
      Likes Received:
      25
      Joined:
      Sep 3, 2018
      Location:
      Los angeles
      Local Time:
      12:43 AM
      The exhaust is currently almost done, I'm behind on updating this thread but will post the pics I took as well as my process.