Announcement

Collapse

Get more Tips, Specs and Technical Data!

Did you know... this Forum is a service of the Studebaker Drivers Club? For more technical tips, specifications, history and tech data, visit the Tech Tips page at the SDC Homepage: www.studebakerdriversclub.com/tips.asp
See more
See less

afb manifold slots

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • afb manifold slots

    Why are some of the afb manifolds slotted between the bores
    and some are not?
    64 Champ long bed V8
    55/53 Studebaker President S/R
    53 Hudson Super Wasp Coupe

  • #2
    Depends on the manufacturer.
    The 'balance slots' tend to even out any pulses at idle (high manifold vacuum).
    It cost's money to make slots, so some cut that corner figuring a performance intake manifold doesn't spend most of it's time idling.
    Removing the center divider hurts idle, too. At WOT and higher rpm, you can get away without one, but the idle to 3k range will suffer.
    Jeff[8D]


    quote:Originally posted by Kdancy

    Why are some of the afb manifolds slotted between the bores
    and some are not?


    DEEPNHOCK at Gmail.com
    Brooklet, Georgia
    '37 Coupe Express (never ending project)
    '37 Coupe Express Trailer (project)
    '61 Hawk (project)
    http://community.webshots.com/user/deepnhock

    HTIH (Hope The Info Helps)

    Jeff


    Get your facts first, and then you can distort them as much as you please. Mark Twain



    Note: SDC# 070190 (and earlier...)

    Comment


    • #3
      The word Jeff uses..."suffer" is a very "relitive" term.
      While he is technically correct why the slots are there, only those with the most sensitive butts will recognize any drivability or idle problems.
      And how many really care if it idles at 700 rpm or 725rpm?

      A "fully" divided manifold will perform better at lower rpm's.
      A divider that has been cut down ([u]OR</u> a spacer was added!!!) will give the advantage to the mid-range and upper rpm range.

      I'll bet all those who added a spacer to install an Edelbrock carburetor never even realized an idle difference once the tuning was done(!)!

      Mike

      Comment

      Working...
      X