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A/F mixture and Card balancing
#297114 10/15/2008 10:29 PM
Joined: May 2006
Posts: 113
Mallard Offline OP
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Posts: 113
Being a novice at this, I have questions about how best to set my mixture screws. There are a couple of posts on how to do this, but none that seem to provide a definitive metric on whats a 'best' setting. Is the mixture setting more art than science? Is there any metric other than a)smoothest idle, b)color of plugs, or c) minimal popping on decel?

Also, is there a relationship between the a/f mixture and having the carbs balanced? If one side is more lean or rich than the other, will the balance be significantly affected?


Mallard "Anyone who has never made a mistake has never tried anything new." - Einstein
Re: A/F mixture and Card balancing
Mallard #297115 10/15/2008 11:31 PM
Joined: Dec 2006
Posts: 2,150
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I've tried the techniques others seem to have perfected and for me it hasn't worked as easilly as it has for them.

Dunno why, but all is not lost cos I have perfected my own technique that works for me.

Basically what I do is turn my mixtures out about 1 full turn to start with and with the idle turned down and the motor at least warm, I then go from one mixture screw to the other trying to get a nice consistant idle and a setting that also has as little hesitation as possible when blipping the throttle.

It can take a little while but you will find that sweet spot if you are patient. I know it works too cos the last time I had a dyno, the operator said my settings were just about pretty well spot on and my air fuel ratio chart was pretty flat too.

Of course, you won't be able to get the settings sorted if you pilot jets aren't suited to the rest of your settings ie you have Staintune pipes and you try to use 42 pilots when you should be using 45 pilots.

As far as your question about the air fuel mixture and balancing, to me that is irrevelent cos the idea is to get your air fuel setting nice and then you do the balancing.

That's how it's worked for me anyway.

One final thing, and this came from one of my mates on here, it's not a bad idea to have nice clean air filters when working on your mixture screws.


Staintune Pipes, K&N Pods, 45 pilots, TBS needles and 145 mains.
Re: A/F mixture and Card balancing
Mallard #297116 10/16/2008 9:26 AM
Joined: Jan 2005
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moe Offline
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yes. metrically speaking, a dyno run with a exhaust sniffer.


Blowing gravel off rural roads

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