[Healeys] Fuel Mixture

[Alan Seigrist]

Gergo -

Your motor is fresh off a rebuild, correct?  I would expect settings
to change slightly as the rings bed in, you should be able to set
leaner with time.

Regards,

Alan

On 10/11/11, Austin Healey <pajtamuvek at gmail.com> wrote:
> I set my BN4 with a wide band oxigen sensor, where I could track the mixture
> under all driving conditons. I found that my engine would only run good on
> rich mixture. Much richer than the stochiometric ratio. I tried everithing
> to adjust the mixture weaker like new needles, springs, different fuel
> levels, ignition timing etc, with no use. My carbs are completely rebuilt
> units. I concluded with a richer mixture, and the car is running fine with
> smooth idle and instant rev pickup. Soo I had to accept this richer mixture
> as appropriet.
> Sparks look normal after a run, but if I let it idle for longer, they get
> darker.
>
> Gergo
>
> 2011/10/11 Keith Bailey <keithbailey5 at bigpond.com>
>
>>    Hi All
>>            On my BT7 when I do a tune up the plugs always appear sooty
>> indicating it is running rich
>>            However when I clean the plugs clean and adjust the points
>> Remove
>> the three air cleaners
>>            balance the carbs adjust the mixture screw  lift the piston
>> with
>> raising pin the engine wants to stall.
>>            The car drive good engine perform as expected. However when on
>> a
>> trailing throttle down steep hill
>>            I get a burbling through toe exhaust Which would indicate to me
>> that the mixture is about right
>>            But I cannot explain the sooty plugs. The engine does not burn
>> or
>> use oil any suggestions would
>>            be appreciated
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