Op 30-1-2021 om 15:05 schreef Bob Haskell:
> Kees,
>
> SU pumps come with different delivery pressures: 3.8 and 2.7 psi. I
> always thought that the big Healeys used the lower 2.7 psi. But while
> I know the pump specification that should be fitted to my car (AUA
> 72), I've never run across a piece of SU literature that gives the
> delivery pressure for each pump specification. Can you point me
> towards one?
>
> Cheers,
>
> Bob Haskell
> Austin Healey 3000 BN7/BT7 registrar
>
> On 1/30/21 1:05 AM, Kees Oudesluijs wrote:
>>
>> The SU AUF 301/303/305 fuel pump should deliver 15 Imperial
>> gallons/hour. Maximum pressure should be 3,8psi.
>>
>> Kees Oudesluijs
>>
>>
>>
>> Op 29-1-2021 om 23:12 schreef Michael Oritt:
>>> If all else fail check your fuel pump for sufficient delivery. I
>>> can't remember for sure but believe a free-flowing SU is supposed to
>>> pump a gallon in a minute, but I'm sure someone will correct me if I
>>> am wrong.
>>>
>>> Best--Michael Oritt
>>>
>>>
>>>
>>> On Fri, Jan 29, 2021 at 9:14 AM healeyguy--- via Healeys
>>> <healeys@autox.team.net <mailto:healeys@autox.team.net>> wrote:
>>>
>>> Â Â Â Len and Listers
>>> Â Â Â Pushing the pin up to lift the piston is the start of the "test
>>> Â Â Â the mixture setting" exercise. You begin the push, ever so
>>>    slightly, and listen to the idling engine. The idle goes up.
>>>    What do you do next? You continue to raise the pin to see what
>>> Â Â Â happens. If the idle continues to rise you know you are in a rich
>>> Â Â Â condition. If the idle stops going up and starts to drop off the
>>> Â Â Â mixture is pretty close. If the idle does not increase from the
>>> Â Â Â start you usually assume you are in a lean condition. This gets
>>> Â Â Â the carb mixture close at idle which in theory means the carb is
>>> Â Â Â going to operate throughout the RPM range.
>>>
>>> Â Â Â There is one other assumption here, that being that the carbs is
>>> Â Â Â in the same condition as new mounted on an engine operating as
>>> Â Â Â new. That is when allot of other stuff comes into play. The carb
>>>    float bowl items, needle/seat and float level must be set
>>> Â Â Â correctly. Float must not be leaking thus making it sink. Carb
>>> Â Â Â must have the correct main needle and jet and they have to be
>>> Â Â Â installed and adjusted correctly. Flutter at high RPM may
>>> Â Â Â indicate that the piston spring in the suction chamber is weak or
>>> Â Â Â the incorrect spring installed. Ignition timing and condition and
>>> Â Â Â setting of ignition points.
>>> Â Â Â The list goes on and on......
>>> Â Â Â P
>>>
>>>
>>> Â Â Â -----Original Message-----
>>> Â Â Â From: Leonard Berkowitz <DrBerkowitz@hotmail.com
>>> Â Â Â <mailto:DrBerkowitz@hotmail.com>>
>>> Â Â Â Subject: [Healeys] Another backfiring question
>>>
>>> Â Â Â Hi all
>>>
>>> Â Â Â Just finished repairing and reinstalling the carburetors on my
>>> Â Â Â BJ7. I thought I had everything adjusted properly. According to
>>> Â Â Â my Haynes Manuel the engine speed should increase slightly when
>>> Â Â Â you lift the piston a very small amount. Mine does that. My
>>> Â Â Â dwell angle is where it needs to be and the car starts and idles
>>> Â Â Â nicely. Also sounds beautiful when I punch the accelerator
>>> Â Â Â linkages. The problem is that when I get it up to 60-70 mph I get
>>> Â Â Â what sounds like backfiring into my carburetors. Also sounds like
>>> Â Â Â it doesnâ??t have a whole lot left in the tank, so to speak. Does
>>> Â Â Â that sound like I am running too rich or too lean?
>>>
>>> Â Â Â Len Berkowitz
>>>
>>>
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>>
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