[Fot] Intake Manifold Crossover

[Joe Boruch]

Thanks to all who responded.  Some great information!  I will leave well
enough alone and keep my crossover flowing.  Joe(B)

-- "Kas Kastner" <kaskas at cox.net> wrote:
I did replace the balance tube with clear tubing and you could see the
mixture
pulsing back and forth. Interesting ,but  of little value.

Never Be beaten by Equipment
Kas Kastner
  ----- Original Message -----
  From: Bill Babcock
  To: SHANE Ingate
  Cc: fot at autox.team.net
  Sent: Saturday, May 05, 2007 1:27 PM
  Subject: Re: [Fot] Intake Manifold Crossover


  Actually, you see them on a lot of cars. They don't really help flow
  much, especially coming in at a right angle as they often do. The
  moderate pulses in the intake system by creating a larger air volume
  downstream of the butterfly or CV piston. At least that's the reason
  given for why they ware added to manifolds to begin with. Most early
  intake manifolds look like the pattern for the castings was made from
  plumbing bits. Perhaps they were. They flow as badly as they look. A
  stock Triumph intake manifold flows about half as much as a similarly
  sized modern one.

  Bill Babcock
  billb at bnj.com
  bnj  Website for Babcock & Jenkins, a direct and interactive agency

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  On May 5, 2007, at 11:48 AM, SHANE Ingate wrote:

  > I don't know anything about this, but intuitvely, if it
  > was important, I would think that we would have seen
  > x-overs on ALL intake manifolds through the demise of
  > carbs.
  >
  > Shane Ingate, what the $%#@ do I know, in Md
  >
  >> I have been debating the merits of blocking off the cross over
  >> tube in my
  >> TR4
  >> intake manifold.  I have read that the tubes create turbulance and
  >> should
  >> be
  >> blocked off.  Reading it and practical application, however, are 2
  >> different
  >> things.   I have also heard of some MG racers blocking them off,
  >> but that
  >> still does not make it right.  Have any of you Listers tried
  >> this?  Any
  >> dyno
  >> testing to determine if it is worth while?
  >> Joe(B)
  >
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