Separate Paths through One Cat?

Discussion in 'Exhaust and Mufflers' started by KIRBY, Dec 29, 2018.

  1. KIRBY

    KIRBY Member

    no, just theorizing
     
  2. Maniacmechanic1

    Maniacmechanic1 solid fixture here in the forum

    OK.
    I used to do the same alot.

    I just want Big Massive Primary Header tubes & Big header collectors.
    Race car.

    Smaller stuff is Ok for street power.
     
  3. KIRBY

    KIRBY Member

    I've been wondering about what 180 degree headers were, until I saw a picture. they are the four 360 degree headers with each side pairs joined together.
     
  4. Maniacmechanic1

    Maniacmechanic1 solid fixture here in the forum

    Famous Road racers used them in the past.
    They also reduced ground clearance.
    I have heard of guys using them in Vintage Ponly Musclecars & snagged them on potholes & sewer cap lids.
    Both banks of 180 degree headers ripped off the car instant.

    Herb Adams the father of the Trans Am used them SCCA Road Racing I recall tonight.
     
  5. Maniacmechanic1

    Maniacmechanic1 solid fixture here in the forum

    [​IMG]

    Most Famous Current 180 degree headers custom built on Facebook Racing Groups present.
    From SEMA 2018 Las Vegas.
    1970-1/2 Pontiac Trans Am.

    Made my own 1970-1/2 Pontiac Firebird Trans Am Red Hot again.
     
  6. KIRBY

    KIRBY Member

    WHAT A BUNDLE OF SNAKES! Should reverse the intakes and exhaust and run the headers out the middle. Shorter distances to mate 180 pairs.[​IMG]
     
  7. Maniacmechanic1

    Maniacmechanic1 solid fixture here in the forum

    It was some guys dream build.
    Supposedly it makes 1000 HP @ 10,000 RPM.
    Who knows.
    Streets, Dragstrips, & Road race tracks prove all.
    If You line up and Race a Dodge Demon, or Hellcat & Win the BS stops.
     
  8. Maniacmechanic1

    Maniacmechanic1 solid fixture here in the forum

  9. KIRBY

    KIRBY Member

    Seems if you want to stroke your engine, you could install a flat plane crank , (have to replace the crank, anyway) and maybe OHC heads, and have each bank firing like a flat plane four, with the left bank firing 2, 6, 8, 4, at 180 degree intervals, simplifying your 180 degree header routes by keeping them on the left side, and the right bank firing 1, 5, 7, 3 at 180 degree intervals, (90 degrees after their crank pin mates), for a firing order of 1-2-5-6-7-8-3-4, again, keeping the 180 degree header pipes all on the right. (maybe the right bank firing would be 7, 3, 1, 5, for 7-2-3-6-1-8-5-4, but still all the 180 firings would be on a side. I'm trying to do this all in my head, so I may be off on the flat plane firing orders, but not the 0-180-360-540 positions.
     
  10. KIRBY

    KIRBY Member

    Yeah, a lot of work for sound.
     
  11. Maniacmechanic1

    Maniacmechanic1 solid fixture here in the forum

    Need $$$$$.
    Big Dreams just cost $$$$$$$$$.

    I had to pick something semi practical.
    Found Sunoco Race Gas local for $6.999 per gallon at a gas station.
    Going for High Octane Big 455 Pontiac V8 RAIV top end ( All Real worth over $18k today),
    Isky Solid Race Cam...
    Blah Blah but best going in !
     
  12. Maniacmechanic1

    Maniacmechanic1 solid fixture here in the forum



    It does sound Good.
     
  13. Grumpy

    Grumpy The Grumpy Grease Monkey mechanical engineer. Staff Member

  14. KIRBY

    KIRBY Member

    Grumpy, I'm not sure what that means.
     
  15. Grumpy

    Grumpy The Grumpy Grease Monkey mechanical engineer. Staff Member

    sorry the previous link did not work correctly, I was pointing out the new reverse center flow exhaust heads
     
  16. KIRBY

    KIRBY Member

    I see. Pretty interesting. Even without the turbo chargers, the 180,or 360 headers would be much simpler.
     
  17. KIRBY

    KIRBY Member

  18. Maniacmechanic1

    Maniacmechanic1 solid fixture here in the forum

    There is a problem trying to make a Hot V engine from a traditional V8.
    The Intake ports flow more than exhaust side on near all.
    To set Exhaust to Intake Ratio.
     
  19. KIRBY

    KIRBY Member

    It would take new or modified heads. I'd like to see rotary valves, if not Koenigsegg"s Free Valves.
     

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