Re: [TR] SU Carbs

[<wbeech@flash.net>]

Roger,
Run the mixture nuts back up 1 turn(six flats). Check the linkage to be sure
it is not hanging up somewhere, then check the butterflys.

Manually reach down and be sure the jets are pulled up all the way, these
can become sticky with long periods of sitting.

Bill 

-----Original Message-----
From: triumphs-bounces@autox.team.net
[mailto:triumphs-bounces@autox.team.net] On Behalf Of Roger Elliott
Sent: Tuesday, April 24, 2012 8:44 PM
To: triumphs@autox.team.net
Subject: [TR] SU Carbs

Hi,

I am trying to adjust the dual HS4s on my 80 Spitfire.  I adjusted the carbs
to the recommended starting point to try to get a fresh run at adjusting
them.

Turned the jets down 12 flats (2 turns) and then turned the throttle 
screw down 1 1/2 turns after it just came into contact with the lever.   
I noticed that the  throttle screws were not in contact with the lever when
I started.

When I started the car it was running about 2600 rpm.  When I got it back
down to close to 1,000 rpm, it looks like the throttle screws were no longer
touching the levers.  Choke seems to be off, the fast idle screws are not
touching. I rebuilt the carbs about 4 years ago.

I did not take them off, but it looks like the butterfly is closing well.

Any suggestions on what to look at, before I take the carbs off to inspect
the butterfly more closely?

I have adjusted the valves, and timing.

Thanks,
Roger Elliott

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