i was told this morning on the lectron carbs, there is a power jet to dial the
carb in for a large change in density...... But they work pretty good for
reasonable changes in density due to the way the venturi is designed although as
described there is not much of a venturi to speak of anyway. interesting but not
completely self compensating either.
dave dahlgren
William T Smith wrote:
>
> Dave, thanks for the comeback I realize its small, its
> just a blank that I can fill in. I look forward to
> hearing what you find out today and see if I am on the
> right track with my guess about density compensation.
> wmts
>
> Quoting Dave Dahlgren <ddahlgren@snet.net>:
>
> > have you ever looked at the corrections for humidity?
> the range of them i
> > mean...
> > Trust me on this it is a waste of time to get
> concerned about. generally
> > when
> > someone attributes a power change due to humidity it
> is because they see a
> > little mist in the air and attribute the power gain
> or loss to that. Well
> > what
> > they saw was the result of a change in baro or air
> temp and the dew point
> > changed so they could see the water in the air. get a
> good physics book and
> > play
> > with the math a bit..
> > Dave
> >
> > William T Smith wrote:
> > >
> > > If the rod was attached to a aneroid drum like in a
> > > barometer then it could move the tapered needle in
> or
> > > out as dictated by pressure altitude. But how
> would it
> > > handle humitity changes? On my Speed Pro EFI we
> have to
> > > enter the humitity--it compensates for the rest.
> > >
> > > Quoting Dave Dahlgren <ddahlgren@snet.net>:
> > >
> > > > I will call them on monday i have got to know how
> > > this works ..
> > > > Dave
> > > >
> > > > Joe Amo wrote:
> > > > >
> > > > > Dave they
> > > > > COMPENSATE for air density changes.
> > > > > The reason so many use these carbs is that
> > > > > they not only make the most power, but they
> > > > > allow you to travel to anywhere in the world and
> > > require
> > > > > NO changes/adjustments, racers travel unload
> and do
> > > not
> > > > > have any adjustments to make, yes sea level or
> > > Denver,
> > > > > same set up, 32 degrees or 120, same set up,
> > > thousands of
> > > > > users every weekend can attest to them.
> > > > > Joe :)
> > > > >
> > > > > Dave Dahlgren wrote:
> > > > >
> > > > > > Wouldn't that be a CFM change and not a
> density
> > > change. most carbs will
> > > > > > compensate for a CFM change quite well. I can
> put
> > > the same 750 Holley
> > > > or carter
> > > > > > on a wide variety of engines and it will work
> > > quite well but neither
> > > > will handle
> > > > > > a 4000 ft change in altitude very well.
> > > > > > Dave Dahlgren
> > > > > >
> > > > > > Joe Amo wrote:
> > > > > > >
> > > > > > > Dave, the "Lectron" is the "Fast By Gast"
> carb
> > > of Pauls.
> > > > > > > Sort of Pauls, it came on two strokes a few
> > > years ago,
> > > > > > > he simply picked up on it again, Vesco ran
> them
> > > on many
> > > > > > > of his machines. They are truly the poor
> mans
> > > EFI,
> > > > > > > the set I got came off of a 1500cc plus 275
> hp
> > > NA
> > > > > > > motor, when I called Paul to find out were I
> > > should
> > > > > > > set the metering rod length for a baseline
> on
> > > my 998cc
> > > > > > > motor, he said
> > > > > > > "didnt they work on the bike they came off
> of",
> > > I said
> > > > > > > yes, and on they went, they carburate
> perfectly,
> > > > > > > how is that for compensation?
> > > > > > > Joe :)
> > > > > > >
> > > > > > > Marge and/or Dave Thomssen wrote:
> > > > > > >
> > > > > > > > Joe
> > > > > > > > Paul Gast makes a carb for the pro stock
> > > motorcycles that does the
> > > > same
> > > > > > > > thing, now that you mention it. None of
> the
> > > scooter racers have to
> > > > change
> > > > > > > > jets at all.
> > > > > > > >
> > > > > > > > Dave the Hayseed
> > > > > > > >
> > > > > > > > ----- Original Message -----
> > > > > > > > From: Joe Amo <jkamo@rapidnet.com>
> > > > > > > > To: Dave Dahlgren <ddahlgren@snet.net>
> > > > > > > > Cc: Marge and/or Dave Thomssen
> > > <mdthom@radiks.net>; Land-speed
> > > > Racers
> > > > > > > > <land-speed@autox.team.net>
> > > > > > > > Sent: Saturday, June 16, 2001 2:28 AM
> > > > > > > > Subject: Re: Fw: Hilborn v. carbs
> > > > > > > >
> > > > > > > > Mine do Dave, you can borrow them, they
> are
> > > > > > > > Lectron (brand name), a flat slide carb
> with
> > > a tapered metering
> > > > > > > > rod, no jets, yes they compensate
> > > > > > > > for air density, dont need no electronics,
> > > dont need
> > > > > > > > no high falootin fuel system, its all
> > > natural, self compensating,
> > > > > > > > the dyno and the timing system dont lie,
> ask
> > > ANY motorcycle
> > > > > > > > prostocker (or 90% of any at the
> dragstrip,
> > > or wanna be me)
> > > > > > > > Joe :)
> > > > > > > >
> > > > > > > > Dave Dahlgren wrote:
> > > > > > > >
> > > > > > > > > Then what is with all the jets for
> changing
> > > things?? You mean to
> > > > tell me
> > > > > > > > that a
> > > > > > > > > Holley or carter carb will need no jet
> > > correction to run at 4000
> > > > ft and
> > > > > > > > 110
> > > > > > > > > degrees instead of sea level and 60
> > > degrees.. Sure wish i had one
> > > > of those
> > > > > > > > !
> > > > > > > > > Dave
> > > > > > > > >
> > > > > > > > > Marge and/or Dave Thomssen wrote:
> > > > > > > > > >
> > > > > > > > > > And the answer is: any brand but
> > > Stromberg!
> > > > > > > > > >
> > > > > > > > > > ----- Original Message -----
> > > > > > > > > > From: Dave Dahlgren
> <ddahlgren@snet.net>
> > > > > > > > > > To: Marge and/or Dave Thomssen
> > > <mdthom@radiks.net>
> > > > > > > > > > Cc: Land-speed Racers <land-
> > > speed@autox.team.net>
> > > > > > > > > > Sent: Saturday, June 16, 2001 5:20 AM
> > > > > > > > > > Subject: Re: Hilborn v. carbs
> > > > > > > > > >
> > > > > > > > > > And the brand carb that will make air
> > > density changes is?
> > > > > > > > > > Dave Dahlgren
> > > > > > > > > >
> > > > > > > > > > Marge and/or Dave Thomssen wrote:
> > > > > > > > > > >
> > > > > > > > > > > Bill
> > > > > > > > > > >
> > > > > > > > > > > I think the major difference
> between a
> > > Hilborn and a carb is
> > > > the
> > > > > > > > modern
> > > > > > > > > > carb
> > > > > > > > > > > (not a 97) automatically adjusts for
> > > changes in air density
> > > > (within
> > > > > > > > > > limits)
> > > > > > > > > > > and the Hilborn relies on you to
> change
> > > the pill. If you get
> > > > the pill
> > > > > > > > > > > wrong, the carb out-powers the
> > > Hilborn. EFI is one step
> > > > better, it
> > > > > > > > > > > automatically adjusts everything.
> CFM
> > > aside, Hilborn trumps
> > > > carb and
> > > > > > > > EFI
> > > > > > > > > > > trumps Hilborn just because of the
> > > fineness of the
> > > > spray(liquid fuel
> > > > > > > > does
> > > > > > > > > > > not burn, only vapor). Having done
> it,
> > > I have to say that
> > > > tuning an
> > > > > > > > engine
> > > > > > > > > > > equipped with 97's was the biggest
> > > challenge, but I like my
> > > > Holly 750.
> > > > > > > > > > > Dave the hayseed
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