You forgot to set the static timing to about 5 deg btdc or so. also, if you
have new tappets, or camshaft and tappets, it's very important to run the
engine at no less than 2000 rpm for at least 20 minutes to break in the
camshaft to tappet surfaces. So getting the timing close, having the carbs
with a fuel supply, having a cooling system, etc, are things that you really
should do before starting the engine.
Usually, I get the thing timed while running it at 2000 - 3000 rpm (blip
the throttle to get 4500 rpm or so and set to max advance of about 30 deg),
and get a good basic idle after that. Then, I fine tune after it's had a
chance to cool down for awhile.
One other thing - with SU's, always set the jets to two full turns down,
which is the basic setting for idle mixture. Set the idle adjusting screws
to full off, and keep the car running manually for a minute or so, while you
screw them down to get the 2000 rpm idle. then, set the idle to 900 rpm or
so after the 20 min are up.
Brian
At 10:24 AM 05/01/98 -0500, you wrote:
>
>Hello everyone!
>
>With the goal of having the subsystems of the 1275 work in harmony, I will
>be adjusting the carburetors, setting the timing, setting the vacuum
>advance, (etc.?)
>
>Manuals usually say "have everything else done before adjusting ______"
>When starting from scratch, what is the correct procedure?
>
>My guess:
>
>Manually set dwell,
>disconnect vac-advance,
>warm engine
>rev to ______ RPMs
>adjust timing to _____ BTDC(?)
>perform Roger Garnett's carb tuning procedure.
>
>Is this about right? Did I miss anything? What are the numbers?
>
>Thanks!
>
>Jim Henderson
>
>'69 Sprite MKIV HAN9U78817G with 50 happy pounds of oil pressure.
>
>
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