Doubt they even knew what the CO levels were in the Healey days.
Assuming your car runs well now, take a measurement. Then, lean it out a
little and see if it still runs well (i.e. no hesitation, no backfire through
the carbs,
etc.). Lean until it just barely runs right, then enrichen back to the
leanest
CO level that still ran well. Then, you can periodically check the level to see
if anything's changed.
My guess is you'll end up on the rich (4.5%) side of the range, if not higher.
bs
***************************************************************
Bob Spidell San Jose, CA bspidell@comcast.net
'67 Austin-Healey 3000 '56 Austin-Healey 100M
***************************************************************
-------------- Original message ----------------------
From: M Fawcett <m.fawcett@verizon.net>
> Hi All,
> My wife bought me a Gunson's Gastester for Christmas so thought I'd give it a
> try. When I read the booklet that comes with it, it states that the CO level
> should be set according to the manufacturers requirements. Does anyone know
>what
> the percent of CO should be for a 1960 Big Healey. The booklet suggests that
> the range is from .5% to 4.5%. This seems a little wide and I'd like to
>narrow
> it down. Any help is appreciated.
>
> Mark Fawcett
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