You might like to have a look at the site below - select 'Spanners' and 'SU
Carbs'.
PaulH.
http://freespace.virgin.net/paul.hunt1/
(or if that URL doesn't work try )
(http://194.168.54.52/paul.hunt1 )
----- Original Message -----
From: <mistebar@juno.com>
To: <MGS@autox.team.net>
Sent: Monday, March 20, 2000 6:44 AM
Subject: Tuning SU's
> Help! My first major project with out 68 MGB-GT and I am sending out an
> SOS! I tuned the carbs, following the standard directions. The major
> problem is with the fuel mixture in the first Carb. I took both carbs
> apart, cleaned (did not change the setting on the needle) and put them
> back together, making sure both jets were at the same position. I got
> them balanced out using a Unisynch, then started to work on the fuel
> mixture. I started with the suggested 2 turns out, and both carbs
> increased RPM when I lifted the pistons. I got to a point where the rear
> carb no longer increased RMP but the front one still did. I ended up
> getting the front jet all the way up, and it still increases the RPM when
> I rease the piston. I took the daspot off, and sure enough, the jet is
> all the way up. It was pretty late when I finished, but ran it around the
> block and it seemed like I was getting some back firing when I shifted
> which would imply too rich. The smoke was no longer black out the
> exhaust. What did I do wrong?
>
> The only other problem I have is that the choke no longer works. I
> checked and it is not lowering the jets nor is the cam engaged by the
> fast idle screw. I can pull the choke handle in the cab out, but nothing
> happens. I can move the choke by hand and it is not stuck. The fitting
> which holds the end of the choke cable on my carbs screws onto the back
> of the first carb, but it only goes on one way and is not in the way of
> the choke mechanism. Where do you find the end of the choke handle, where
> it connects to the cable?
> http://dl.www.juno.com/get/tagj.
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