[Healeys] Fuel Mixture

[Linwood H Rose]

Dave,
So true, so true! I used to be one of those who said "come on, can't I lean this out a little more?, Can't I get rid of that smell of unburned fuel?" "Oh yeah, let's try this other set of needles."

Yes, you can improve things - the car should be in good tune, but I have concluded the hard way that you are EXACTLY RIGHT. It is what it is. So now I just enjoy it, it performs well and it puts a smile on my face.

Lin


Lin Rose
1959 AN5 Bugeye - pure driving enjoyment, go-kart with a body.
1960 BT7 "The Bloody Beast" - owned since 1971, my first car and still have it!
1964 Jag MKII - current project




On Oct 11, 2011, at 9:10 AM, David Porter wrote:

> I love you guys.. You keep me in business.
> These are not new engines with engine management systems to automatically
> adjust for everything from temperature, air flow, vacuum, ignition timing to
> altitude. They were designed to run decently under most conditions that
> might be experienced. The engines were/should be run on the rich side,
> certainly no less than 3% hydrocarbon. The then leaded fuel being used for
> valve lubrication and cooling the valves, besides the obvious octane boost
> too.
> The needles in the SU's rising and falling based on vacuum demands and the
> distributer working by simple mechanical means to meet general conditions.
> Face it, they were dirty running by any description. If you try to run them
> lean it will lead to problems down the road. Get used to the fact that
> changing spark plugs was a necessary routine chore. There are no separate
> circuits in an SU for idle or WOT (wide open throttle). One can spend hours,
> no days running the car at 70MPH coasting to a stop, pulling the plugs to
> examine them for mixture then installing a different needle taper to adjust
> the results or one can follow the factory specifications and be secure in
> the knowledge that you have a properly adjusted engine that meets most
> needs.
> Just saying.. 
> dave
> 
> frogeye at porterscustom.com
> 
> Porter Customs   2909 Arno NE
> Albuquerque, NM USA 87107
> 505-352-1378
> 1954 BN2  1959 AN5
> Porter Custom Bicycles
> 
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> 
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