>> Just received replacement floats for my SU HS carbs on the 66 MGB. Unlike
>> the old ones, the replacements are all plastic so there is no arm to bend.
>> The question is: do I set the clearance to 1/8" between the lid and the
>> float using washers under the needle valve or are the floats shaped so that
>> they don't need adjusting?
>>
>> I have some new, appropriate washers from a S.U. rebuild kit I bought years
>> ago for the Volvo wagon
>>
>> Dirk
>
>Not done it but I hear washers is the way to go.
>
I can second that from experience (irrelevant anecdote follows). In my
case the replacement floats also cured a weird "cut-out" I was getting at
certain speeds. It seems that engine vibrations at that RPM caused a
resonant vibration in the thin brass float arms, which proceeded to
"dribble" the balls in the Grose-Jets like a Harlem Globetrotter routine,
interrupting fuel delivery in a sputtering fashion. My mechanic said he
had heard of similar cases with Grose-Jets, but hadn't realized it was
related to the type of float.
But anyway, I think it took just one washer to set the clearance
perfectly.
Carry on!
Max Heim
'66 MGB
runs great, needs paint
Palo Alto CA
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