Hi James,
You only need to check and compare cylinders 4 and 2 (1 being the one by the
radiator!), as they are the easiest of each pair to get to!
Don't assume that equal turns on the mixture screws give equal results.
All I do is put the colortune in no.4. Adjust to the right mixture. Then repeat
with
no. 2. Readjsut the idle speed. And Bobs your uncle!!
I agree about the position of number one plug, but I have worked out that by
using a
plug socket that has a hex on one end, and an adjustable wrench to turn the hex
I can
just about do it!!
I wouldn't complain about the design of the spit engine, there are few cars
where a
machanics seat is provided on both sides of the engine (the wheels). and whats
better
they are padded...
Good luck and just think at least you only have 2 carbs, I've got 4 on my spit
(webers), which means 4 idle jets, 4 main jets, 4 immulsion tubes, 4 air
corrector
jets, 4 venturi....
Cheers
Tim
James Carruthers wrote:
> At what point do I start to "balance" the mixtures?
>
> At first I changed both the mixtures equal amounts based on one cylinder
>reading
> using the colortune - because it seems reasonable to expect the carbs to be
>similar
> enough for that. If Im right - Do I then change over the colour tune to
>another
> cylinder and then adjust the mixture for just that cylinder? And then swap it
>back
> to the cylinder before to double check..... and keep swapping until there the
>same.
>
> Just in case it inst clear in the above paragraph - I know that youre meant
>to use
> cylinder 1 and 4 or 2 and 3!!
>
> And I'd just like to comment on what a great bit of engineering the engine is;
> whoever laid it out obviously didnt think you'd ever need to change the first
>spark
> plug - but putting the great big alternator in the way (that is what it is
>isnt it
> :) - it seems so strange knowing so much about the carbs now and still not
>knowing
> what anything else is!!)
>
> James
>
>
> "--
> Tim Dafforn
> University of Cambridge
> Structural Medicine Unit
> Cambridge Institute for Medical Research
> Hills Rd, Cambridge CB2 2XY.
> UK
> Tel. (01223) 763230
> Fax. (01223) 336827
> http://smokeroom.cimr.cam.ac.uk/
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