Sat Tara,
Thanks for the approval I do appreciate that and it will hopefully
keep some of the flames off ..... It is hard to conceptualize the way
this works without stepping on "something". Since your suggestion to
put this on a web page somewhere ... so that we could "all" have at it
........ I have been trying everything from "Speedy Alka-Seltzer"
illustrations, (the little guy with the hat and the baton), to
animated GIFs ...... It is really hard to show the interrelationship
of the transition from the pilots into the slide needles ....... (and
keep it from taking 15 minuets to load up on the screen).
I think you are "right on" with the vacuum / mechanical secondary
analogy for the CV / flatslide ..... absolutely positively in regard
to "driveability" expectations.
Fuel bowl vent hoses ......... yikes !! Yes ..... I was thinking the
same thing when I was trying to "sell" the "high pressure under the
lid" concept, (their proximity to the limited high velocity intake
area on a stock configuration). The only justification I have for this
is that there "is" a shield, (cover), over the double tubes to reduce
some of the "milkshake straw ... hanging out the window" effect .....
creating a "negative" pressure on the fuel bowls .... It does provide
a "stable" situation though and with the "stock" airbox intact there
is ample "signal" to move fuel ... so it is very tunable, (IMHO). Yes
... I would think the EPA would like to see a slightly negative
pressure on the fuel bowls to suck up all that evaporating fuel, (of
course .. with the full lid on .. I suspect it is still positive
compared to the pressure at the main air jet located at the top of the
carb .. which vents into the main jet bleed chamber immersed in the
bottom of the fuel bowl ... ), but in this case I don't think it would
be as positive as removal of the vent tubes completely. I was at
Furber's site .. and checking out some of his links ..... there were a
couple of articles at some tuning sites that went deep in depth on the
concept of "where your bowl vents should or shouldn't be" ..... for
this very reason.
campbell
----- Original Message -----
From: "Sat Tara S. Khalsa" <[EMAIL PROTECTED]>
Subject: Re: Stage 1 with trimmed airbox help needed / CV Carb
> TC wrote:
>
> snip
> > ... but if you are having a hard time getting fuel
> > out of the fuel bowl in the first place I think I would
> > strive to see that the most positive pressure possible
> > appear at the end of these hoses.
> Sat Tara wrote:
> snip <
> Had me thinking how useful an "air's eye" view of a CV carb would
be,
> to show folks the relationship between throttle and slide.
> snip <
> You might be able to take the analogy further by comparing vacuum
> secondaries with mechanical ones, as in CV's equal vacuum
> secondaries and flatslides equal mechanical.
> snip <
> ...the placement of the bowl vent hoses, next to the Y openings
> strikes me as being odd from a pure performance standpoint.
> (I suspect that they're put where they are for emissions purposes.)
> It appears to me, at cursory glance, that NEGATIVE pressure is
> created in the hoses, rather than positive, by the action of
high-velocity
> air blowing at 90 degrees across the openings.(The effect is
reduced,
> of course if you remove the Y.)
> snip <
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