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Thread: Thinking about logs

  1. #11
    Join Date
    Sep 2010
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    Texas
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    Hell yeah man, go for it, can't wait to see the build!
    2013 EC Silverado aka redruM (Just a couple bolt ons.)
    2007 RC Silverado aka ?
    1998 Trans AM aka Red Dragon

    "Your pull your truck to the track on a trailer, I race you with a truck that pulled a trailer to the track."

  2. #12
    Join Date
    Sep 2005
    Location
    Austin Tx.
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    Check out some of my pictures, I have one of Allens flipped manifold kits. Works great and no issues. This is one of his newer kits, and he has since modified his design to better accommodated space in the engine compartment.
    1951 3100
    1984 C10

  3. #13
    Join Date
    Jan 2008
    Posts
    1,550
    Hey ducky, I can't seem to find a way to find the pictures you speak of. Can you link me something please

    04 RCSB 5.3, Homemade 80mm FM, TU1, TH400

  4. #14
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    Sep 2005
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    Austin Tx.
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    1951 3100
    1984 C10

  5. #15
    Join Date
    Mar 2003
    Location
    San Antonio, TX
    Posts
    11,038
    IMG_2827.jpg IMG_2829.jpg

    a couple of log pics. the driver's side crosses over the front, and Y's into the T4 flange.

    edited:
    found some more.

    IMG_2674.jpg IMG_2680.jpg IMG_2677.jpg
    Last edited by farmtruc; 08-23-2011 at 10:17 AM.

  6. #16
    Join Date
    Mar 2003
    Location
    San Antonio, TX
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    Here's some more pics of a log design, less complete so you can more detail.

    IMG_2782 (Copy).jpg IMG_2783 (Copy).jpg IMG_2785 (Copy).jpgIMG_2784 (Copy).jpg

  7. #17
    Join Date
    Mar 2003
    Location
    San Antonio, TX
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    use 2.5" on the crossover and a min of 3" on the log. Use 2.5" from the manifolds to the turbos.

    hope this helps.

  8. #18
    Join Date
    Jan 2008
    Posts
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    thanks so much guys for the pictures and the help. Im thinking Im going to go with the traditional log route with a factory manifold on the driver side crossing over underneath the truck then build a log with a 90 degree angle to the flange. Where can i get sch 10 3" 90 degree bends from? And at the back of the log where the crossover comes in, should I Start the log at 2.5" then buy a 3"-2.5" reducer or do i do 3'' the whole way and weld a vband flange on it and have a 3"-2.5" reducer on the crossover right before it goes into the log?
    Last edited by o2camaross; 08-23-2011 at 06:29 PM.

    04 RCSB 5.3, Homemade 80mm FM, TU1, TH400

  9. #19
    Join Date
    Jan 2008
    Posts
    1,550
    and what size pipe for each runner on the log? SCH10?

    04 RCSB 5.3, Homemade 80mm FM, TU1, TH400

  10. #20
    Join Date
    Jan 2008
    Posts
    1,550
    So I did a little digging and found these pictures on ls1tech. This guy used two of the same manifolds from a LS4 car. The manifold used is the one closest to the front of the LS4 cars. I do not have my truck in front of me right now and wont until mid next week. At that time i plan to pull the headers off and mount my factory manifolds and see how hard it will be to make some hot pipes. I will do the same with my LS3 manifolds of off my camaro. If neither of them seem to be a good fit, I may buy some of the LS4 manifolds because they seem to be right on. The only thing Im a little worried about is that the LS4 manifold has only a 2 bolt flange. Tell me what yall think!




    04 RCSB 5.3, Homemade 80mm FM, TU1, TH400

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