Headers

Discussion in 'Race 400/430/455' started by jmhock, Feb 3, 2021.

  1. jmhock

    jmhock Well-Known Member

    The SPX manifold doesn't fit the TE heads. Needs an adapter plate so this intake seems the best without something custom.
    The 2 1/8 headers also doesn't fit the 67 body. Another custom fit item as I thought.
    Thanks for all the info
     
  2. hugger

    hugger Well-Known Member

    The 2.125 will fit the 64 to 67 chassis,...you will just need to make some frame mods,..all simple to do,..just more work but well worth it when you are servicing it

    The SPX with the adapters is a very worthwhile investment probably close to 30hp on your setup,.plus a much cooler intake charge
     
  3. jmhock

    jmhock Well-Known Member

    Can you highlight the frame mods and where to get the adapter? Was there a different collector you recommended and does TA have it as part of the header?
     
  4. hugger

    hugger Well-Known Member

    Ill post some pics and links this weekend
     
  5. jmhock

    jmhock Well-Known Member

    Thanks for all your suggestions. I really appreciate your efforts. I will update the intake and exaust as you reccomend. Let me know of any other tricks.
     
  6. BrianTrick

    BrianTrick Brian Trick

    I would run a 2 1/8 or possibly a stepped header,and a merge collector. That’s if you have a set made.
    Here’s my ported SP2 intake that I’m swapping for a modified Mopar intake. I’m also switching from a dominator to a 4150.
     

    Attached Files:

  7. Bens99gtp

    Bens99gtp Well-Known Member

    Brain is that inside of that intake done with coating like the outside????


    This is my ported spot both b4 and after modification to allow the sv1 to open
     

    Attached Files:

  8. Bens99gtp

    Bens99gtp Well-Known Member

    I think Rob makes the intake adapters if I recall correctly
     
  9. hugger

    hugger Well-Known Member

    https://www.summitracing.com/parts/sch-som13035


    Cone engineering is also a great source for kits and he will help you determine the correct choke size

    Just simply cut the collectors off the TA headers and you can slip these over. There are documented gains of almost 75hp with merge style collectors,. Depends on the application,..but always provides a gain
    .
     
    Last edited: Feb 6, 2021
  10. hugger

    hugger Well-Known Member

    Rob and Jim at Trishield have the adapters
     
  11. hugger

    hugger Well-Known Member

  12. hugger

    hugger Well-Known Member

    Here's the plenum of a Spx,..it offers better distribution,..faster air flow,. Cooler intake charge and better path to the valve. By removing the turn like the SP manifolds have it keeps velocity higher
     
  13. BrianTrick

    BrianTrick Brian Trick

    Yes,it is thoroughly coated in and out.
    I was also considering using the adapters with the SPX,but it still wouldn’t have given me exactly what I was looking for,but better. I was fortunate to find the Mopar intake already done.
     
  14. standup 69

    standup 69 standup69

    This just showed up yesterday
     

    Attached Files:

  15. Jim Weise

    Jim Weise 1000+HP

    Adam..

    That manifold, with just the required port match to make it fit, has shown impressive gains over a fully ported SP-2.

    SP-2, full port,with spacer, 555ci bracket motor

    sp-2 with spacer.JPG

    Edelbrock 2971 with Adapter plates- welded and blended for port match only, with spacer

    Tsp intake with spacer.JPG
     
  16. standup 69

    standup 69 standup69

    Your dyno sheet made my final decision on that piece ...I'm going a 557 so it should fill the bill nicely
     
  17. Jim Weise

    Jim Weise 1000+HP

    Pic..

    SP-2

    DSC02958.JPG

    Edelbrock 2971 with Adapters

    DSC02959.JPG

    I have done the SPX/ adapter routine on TE heads, Jim Byers 1336 HP procharged 555 used that setup.. Good fitting kit, but any way you slice it, bolt on adapters are a pain, compared to a welded manifold. IN the future I am most likely will be able to test the adapters/SPX against my welded Edelbrock Mopar intake.

    JW
     
  18. hugger

    hugger Well-Known Member

    I would MUCH RATHER weld up the SPX instead of the plates no doubt,...probably more work than most care to tackle,..but the Edel and weld on plates are the premium option for sure.

    When I had the 440 Edel Proflo and was going to do the plates,..the port alignment was really hokey,...

    If you want to really stand out and put that scoop to use,..I got what you need!! 20191110_112158.jpg
     
  19. hugger

    hugger Well-Known Member

    To reduce the plenum volume just change the lid,..Holley has several different ones

    Fuel injection ready
     
  20. BrianTrick

    BrianTrick Brian Trick

    Exactly why I wanted to go the route of the Mopar intake. Mines not as pretty right now,but looks don’t get you across the finish line.Ill either get it polished or coated. It went 9:40’s at 3850lbs with the fully ported SP2,but I know I can find a little more. Already contacted Dale Cubic to make the carburetor for it.
     

    Attached Files:

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