Turbo manifolds

Discussion in 'General Fabrication' started by Wyoung369, Sep 8, 2017.

  1. Wyoung369

    Wyoung369 New Member

    Joined:
    Sep 8, 2017
    Messages:
    4
    Likes Received:
    0
    Trophy Points:
    1
    Hello. I'm an aerospace welder and fabricator in the middle of building a car. I'm coming up to the manifolds soon. I've built headers before but not turbo manifolds. I'm using schedule ten pipe as opposed to tubing since the thicker material resists cracking better under repeated heat cycles. Now, my engine has oval ports. I know with tubing you just squish it into an oval. But can you do that with schedule ten? I haven't worked with it much before
     
  2. nwaPLASMA

    nwaPLASMA Well-Known Member

    Joined:
    Feb 12, 2016
    Messages:
    504
    Likes Received:
    255
    Trophy Points:
    153
    IMG_2872.JPG IMG_2880.JPG
    I have a buddy that has built several sets. Here's his response to your question.

    "Would not recommend that, find out what the port dimensions are - what size engine and turbo I can tell you about what size schedule 10 to use."

    Here's a few pics of his work.
     
    LECS-Chad likes this.
  3. Wyoung369

    Wyoung369 New Member

    Joined:
    Sep 8, 2017
    Messages:
    4
    Likes Received:
    0
    Trophy Points:
    1
    For starters, that's some damn good looking work. The size of the pipe here isn't really the issue though. It's the port shape The port is oval the pipe is circle. I'm just wondering if the pipe can be squished into an oval like people have always done with tubing in this same situation
     
    Last edited: Sep 11, 2017
  4. nwaPLASMA

    nwaPLASMA Well-Known Member

    Joined:
    Feb 12, 2016
    Messages:
    504
    Likes Received:
    255
    Trophy Points:
    153
    IMG_7026.JPG
    His reply.

    If he purges it 16 ga will be fine as long as the turbo is supported by a mount and proper double slips or flex joints are used.

    To large of pipe will make a lazy turbo was my point on asking about sizes - I would not oval schedule 10 pipe myself but i suppose you could try it and see if it broke

    Run a smaller 16ga stainless that's easily formed. Like these square to round ones in the attached pic.
     
  5. Wyoung369

    Wyoung369 New Member

    Joined:
    Sep 8, 2017
    Messages:
    4
    Likes Received:
    0
    Trophy Points:
    1
    Is he using 304? Just figured I'd ask. I've read that thinner 304 has a tendency to crack under repeated heat cycling. Which is what led me to the schedule ten stuff. If 16 gauge is fine though, that's a relief on my wallet I suppose. And the manifolds are for a vh45de. It's a 4.5 liter dohc v8. I don't have the port size handy at the moment though.
     
  6. nwaPLASMA

    nwaPLASMA Well-Known Member

    Joined:
    Feb 12, 2016
    Messages:
    504
    Likes Received:
    255
    Trophy Points:
    153
    Yes 304 if the turbo is supported by Its own mount, proper double slip or flex is used on the hot side pipeing so there is minimal stress on the headers 16/14ga will heat cycle just fine - yes they will crack if the welds are poor or if there is stress on them
     
  7. Wyoung369

    Wyoung369 New Member

    Joined:
    Sep 8, 2017
    Messages:
    4
    Likes Received:
    0
    Trophy Points:
    1
    Thanks for being so helpful
     
  8. nwaPLASMA

    nwaPLASMA Well-Known Member

    Joined:
    Feb 12, 2016
    Messages:
    504
    Likes Received:
    255
    Trophy Points:
    153
    NP. Like they say, it's not always what you know..... :D
     

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice