Mixture screws instead of nuts - screw in to make richer.
Also you cannot see when the enrichment device starts to move. There should
be an arrow on the choke cam, you are supposed to line this up under the
fast idle screw with the choke 1/4" out. But on my V8 that results in far
too high an 'idle' - some 2000 to 2500 when cold - I adjust mine to give a
lower idle.
I've never used a Colortune on a twin carb, don't really see how you can
with the balance tube as some of the mixture from the front carb will go to
the rear cylinders and vice versa if it can.
----- Original Message -----
From: "Nick Coleman" <coleman@ameritege.com>
To: "MG List" <mgs@autox.team.net>
Sent: Tuesday, January 29, 2002 8:27 PM
Subject: RE: tuning S-U carbs
> Are there any differences to think about when adjusting SU HIF carbs. I
> can't seem to get mine right...it's driving me nuts.
>
> Essentially, I'll get them balanced. But, when I drive the vehicle, I'm
> getting variations in the engine RPMs at idle (varies between 900 and
> 1300 RPMs). The MG also bogs down at around 5,000 RPMs.
>
> I used a color-tune to set the mixture. And, have set the valve lash at
> .015. And, use a Uni-Syn to balance the airflow. The pistons drop
> smoothly and the butterfly's open/close smoothly.
///
/// mgs@autox.team.net mailing list
/// or try http://www.team.net/cgi-bin/majorcool
///
|