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Re: Need Weber tuning suggestions

To: "Carsten Conrads" <carco@t-online.de>
Subject: Re: Need Weber tuning suggestions
From: "R. Kastner" <kaskas@earthlink.net>
Date: Mon, 5 Jun 2000 09:37:50 -0700
Checking some of my old stuff this all looks pretty good and close to my
past with the 40's.
----- Original Message -----
From: Carsten Conrads <carco@t-online.de>
Cc: Matthew Wilder <mwilder@top.monad.net>; <fot@autox.team.net>
Sent: Monday, June 05, 2000 9:23 AM
Subject: Re: Need Weber tuning suggestions


> The best are 45 DCOE, but 40 DCOE runs it also.
>
> With the 40 Weber take follow parts for a good driving mark:
>
> emulsion tube F2 (if not available take a F16)
> choke 32 (for more power in the top range take 34)
> air correct jet 180
> main jet  130 - 140
> pump jet 40
> idle jet 50F8
>
> With the "D" cam this made approx. really 120 - 125 hp.
>
> If you take a 45 Weber add. approx. 8 hp, with the same engine
> modifications.
>
> But you need a higher compression fuel pump!
>
> see also:  http://home.t-online.de/home/carco/home.htm
>
>
> Carsten Conrads
>
>
> baxter culver wrote:
> >
> > What choke size did Moss supply.  You probably want a 36, or 38 choke.
> > Smaller gives you better grunt off the line--limits upper rpm.  Bigger
the
> > reverse.  The choke determines the velocity of the air column.  I would
then
> > try a fatter main jet.  somewhere in the 150-160 range with an air
corrector
> > at 180-190 range.   Your idle jet is probably ok.   At 3500 rpm you are
out
> > of the idle circuit.  The emulsion tube likewise although I always had
good
> > luck with a F15.   If you can find one, Haynes had a Weber manual
(Haynes
> > #393)  which is excellant.  Has a good tuning section for the DCOE's.
> > Finally, there are sufficient variables in the jetting, emulsions, choke
and
> > air correction to drive you nuts.   However, if you get really good at
it
> > (and invest a small fortune in spares) you can keep the engine at
maximum hp
> > by altering the jetting to compensate for air density and temp/humidity.
> > That's what the racers did before black boxes and electronic
fuel/ignition
> > stuff appeared.  There was always one of the crew who could delve into
the
> > mysteries of Weber and make them sing.  Good luck.
> > ----- Original Message -----
> > From: Matthew Wilder <mwilder@top.monad.net>
> > To: <fot@autox.team.net>
> > Sent: Sunday, June 04, 2000 6:02 PM
> > Subject: Need Weber tuning suggestions
> >
> > > Hello,
> > >   I ditched my SU's in favor of a set of 40 DCOE's from Moss. I got
them
> > > Friday took them out of the box and put them on the car and ran it
today
> > > in an auto-x.  They seemed to work great up to about 3500 rpm then it
> > > just ran out of go and wouldn't make it over 5000 rpm.  I'm running
> > > about 11.5 compresion with some head mods and a "D" cam.  The settings
> > > Moss suplied are:
> > > Air corrector jet  180
> > > Emulsion tube      F 11
> > > Main Jet           130
> > > Idling Jet         45 F9
> > > Pump Jet           40
> > > I also didn't do anything with the float level yet.
> > >
> > > Any suggestions on what setting to use to wake this thing up?
> > >
> > > Matt W.
> > > '67 TR4a  E-prepared Solo 2/auto-x
>


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