Larry,
for best emissions, you want Lambda=1, or 14.7:1. For best mpg, you want
leaner than that, for best power a bit richer than that. Not sure exactly
how rich, but these meters/sensors get very inexact as you get away from
Lambda=1 buy a couple of numbers.
If you are always a little rich, you are probably close.
Ulix
----- Original Message -----
From "Larry & Sandi Miller" <millerls at ado13.com>
To: <bugeye@yahoogroups.com>
Cc: <spridgets@autox.team.net>
Sent: Wednesday, February 28, 2001 8:18 PM
Subject: Air/Fuel Ratio
> Bugiii's is back on the road. Yeah.
>
> One of the winter mods was the installation of an air/fuel ratio monitor
> that has been laying on the shelf for about a year now.
>
> I'm told that optimum AFR is 14.6 to 1. The monitor indicates that I'm
> running at about 12.5 to 1 (a tad rich) under all conditions. This is
pretty
> much verified by plug cuts. Plugs are kinda Brown but on the darker side.
>
> The current Weber DCOE 40 setup is as follows:
>
> 28 mm Chokes
> 45-F9 Idle Jets
> 145 Main Jets
> F2 Emulsion Tubes
> 175 Air Correction Jets
> 45 Pump Jets
> 175 Float Needle
>
> I know, very small chokes, but with all else being the same the car will
not
> even run on 30 mm chokes, much less larger. I know very VERY little about
> Webers so don't know where to start with larger chokes. Mike Pierce
(Pierce
> Manifolds) has offered to help with the setup but I have not gotten around
> to taking it up to his place.
>
> The car runs really well with this setup so I have not felt the need to
fuss
> with the Weber.
>
> For now I plan on just trying some richer idle and mains.
>
> Comments anyone ?
>
> Larry Miller
> http://www.ado13.com
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