For new readers we can cover some old ground here but it's in the archives
(link below)
The mixture setting on your SU's is for the idle running speed. The needles
and jet bodies that are installed were calibrated by the factory to give the
"best" results over the widest operating conditions the car might
experience.
Most of you want to have your engine `"purr like a kitten" when you're
sitting at the traffic light or just showing it off to friends. The only way
to really know how efficient it is running is to do a semi exhaustive
listing of fuel consumption, conditions, speeds, etc. just like the factory
did when selecting the needles. Drive the car at 65MPH for a spell, shut off
engine, coast to a stop, pull plugs and examine. Install a new taper and
repeat process until your performance and fuel consumption are where you
want them. A real PITA..
Kees wants you to use colortune, fine for idle and if you have the correct
needles probably good enough for the use these cars generally see. If you
really want to know what's happening you need the real time monitoring I
mentioned from NGK and other manufactures.
There is a sort of "contest" that these FAQ sessions turn into which, I
think is unfortunate. It is certainly convenient to type a question and wait
for a response. There are a gazillion sources of info available and about
the same number of opinions from all of us...
Google Bosch Automotive Handbook. Add to reading list. Amazon, Powell's
Books, etc..
Dave
frogeye@porterscustom.com
Porter Customs 2909 Arno NE
Albuquerque, NM USA 87107
505-352-1378
1954 BN2 1959 AN5
Porter Custom Bicycles
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www.britishcarforum.com/portercustoms.html
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http://picasaweb.google.com/porterscustombicycles/PorterCustomBicyclesStuff
blog: http://porterbikes.com/
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