[Healeys] slow idle setting

[Oudesluys]

Advanced ignition timing will lead to a higher idling rpm which cannot 
always be compensated.
800rpm sounds fine to me, a low (WSM recommended) idle is not always 
advantageous, it is better to have it slightly higher, better oil flow, 
better mixture, better pick up.
For high altitudes one may need other jet needles and/or piston springs? 
One of the several publications about SU carbs may shed some light on this.
Kees Oudesluijs
NL (low countries, sea level, and well below, all the way)

Richard Kahn schreef op 9-4-2014 23:56:
> I was trying to adjust and balance my HD8s and I cannot figure out the slow
> idle.   I am at 6500 ft elevation and the idle is at 800 RPM. When I drive at
> lower altitudes the slow idle goes to 1000 to 1200 RPM.  Not a problem as the
> BJ8 runs very well. Yesterday, I tried the "cook book" tuning method. When I
> close the slow idle screws then open them 2 1/2 turns the idle is high and I
> get black smoke. I turned the screws evenly a half turn at a time until the
> RPM went down as low as it would go but the best I could get is 800 RPM. The
> screws are now only 1/2 turn open. Again it runs fine. What is going on? I am
> running the timing a little advanced on purpose. Carbs are balanced and I use
> two Colortunes to set the fuel mixture. I will be doing a lot of lower
> altitude driving this year and was hoping to get this worked out if I can.
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