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Ok lets settle this.... how much hp can a holley 670cfm 2bbl tbi support maxed out

Discussion in 'The Garage' started by dirtwarrior17, Jan 17, 2005.

  1. dirtwarrior17

    dirtwarrior17 Banned

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    I just went over to thirdgens.org and they say that with the right pump, tuning, and chip it will support 380-400... I've heard diff numbers everywhere i go. Can yall sound off on this so i can get an idea how close/far i am to a 375-400 horse 2bbl tbi 355? Haven't been able to burn a chip and get to the dyno yet but im hoping somebody has done this b4:1zhelp: :bow: :ears:
     
  2. Topdown

    Topdown 1/2 ton status

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    the new book says 275, the old book says 325

    other than that, no idea.
     
  3. pauly383

    pauly383 Daddy383 Staff Member Moderator

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    I don't know about on paper , but in someone I knows buggy which weighs 3000 lbs and has a 2bbl tbi on his big block , he can light up 38's with 4.10 gears :D
     
  4. dirtwarrior17

    dirtwarrior17 Banned

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    If my setup is good for 5000 rpm it will make 399 hp on the desktop dyno. 5500 411 hp and about 426ftlbs at 4500.
     
  5. sled_dog

    sled_dog 1 ton status

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    may I ask how you came up with that? What specs did you plug in? I used camel hump heads, and I even "ported" them to an astronomical amount of flow(flow you just won't go achieving on them) and only made 400HP at 5500 with your specs. cam specs are 270 duration and .470 lift right? or was it .447 lift?
     
  6. dirtwarrior17

    dirtwarrior17 Banned

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    My numbers were a little off because the dur. is +006 but ... 355, Canted/oval stock ports, stock valves(camel humps have oval ports right?) intake valve is 2.02, exh 1.50, 660 cfm, single plane manifold, actual dur is 272 but dyno says its 278, .447 lift, solid tappet cam, 4 degrees advance. Large tube headers with mufflers.

    My first try at using this thing. I got it for free last night and i think my numbers would be more around 350 -375hp at 5000 but i need to call the builder and get the EXACT specs.
     
  7. sled_dog

    sled_dog 1 ton status

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    Ah we will see.
     
  8. dirtwarrior17

    dirtwarrior17 Banned

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    what did you get?
     
  9. SUBFAN

    SUBFAN 1/2 ton status

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    Change that to a Hydro cam set and watch the numbers plummet....

    Are you really going to run a single plane manifold?
     
  10. sled_dog

    sled_dog 1 ton status

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    367 at 5000 RPMs, you cam isn't solid is it?
     
  11. dirtwarrior17

    dirtwarrior17 Banned

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    yup solid tappet.



    I think the holley projection is single.... dunno:confused:
     

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