Are you required to meet certain emissions levels in your state? If
you are, then those govern, but if you are not, you set the carbs in the
usual way by lifting the pistons and judging engine speed/sound. Within
some range, if it runs right it will be right for emissions.
Here in CT, for example, the original test was done at idle speed.
We all struggled to get out cars to pass that test. In later years, the
test was done at 2000 rpm ( or something in the normal driving speed
range ) in gear on a set of rollers. When the test was done at normal
operating speeds, only poorly-running MGBs would not pass.
Bob
On Sat, 20 Jan 2007 23:24:47 -0600 "Thomas L. Burgin" <tburgin1@cox.net>
writes:
> I have a 1980 MGB with two SU H4 AID 135 carburetors. No catalytic
> converter is on the car. What should be the CO and at what RPM
> should these be set to? I have been told 1.75 to 2.5% CO for
> average driving.
>
> Any other information I need to know?
>
> Thomas L. Burgin
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