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  #11  
Old 8th February 2013
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Not valve grinding compound - toothpaste
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  #12  
Old 8th February 2013
CHOPTOP37 CHOPTOP37 is offline
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A little ot...is this the same thing that made the early so sensitive to flooding during "street duty"..are the early b's susseptable to this too?...
what circuts are so sensitive to float level?
or does it have more to do with the float drop?
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  #13  
Old 8th February 2013
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So I should use toothpaste? or lapping compound? Or machine it?
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  #14  
Old 8th February 2013
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Quote:
Originally Posted by Rigaman View Post
So I should use toothpaste? or lapping compound? Or machine it?
So I should use toothpaste?
wont work.

or lapping compound?
will embed in the brass seat and rip up the needle real fast.

Or machine it?
the prob isnt a faulty seal, its the wrong seal angle that wears in the needle. the needle needs to be reprofiled.

ill post pics tonite.

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  #15  
Old 8th February 2013
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Quote:
Originally Posted by CHOPTOP37 View Post
A little ot...is this the same thing that made the early so sensitive to flooding during "street duty"..are the early b's susseptable to this too?...
what circuts are so sensitive to float level?
or does it have more to do with the float drop?
i know you been waiting patiently. and ive been workin on it.
ill get into this a bit tonite.
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  #16  
Old 8th February 2013
CHOPTOP37 CHOPTOP37 is offline
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Ha... whats time?
I was just curious cuz i know the bowl setting is pretty crucial to reliable starting. theres a few emulsion/air holes i always wondered if they got affected.
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  #17  
Old 9th February 2013
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thank's,D.D. i,thought that float needle looked familiar. went to look for one on my part's shelf in the basement,last night,but was'nt dressed for the cold. bad new's is i'repaced it with the rubber tip. i,keep all my old part's,so i,know i,still have it.
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  #18  
Old 9th February 2013
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Quote:
Originally Posted by CHOPTOP37 View Post
Ha... whats time?
I was just curious cuz i know the bowl setting is pretty crucial to reliable starting. theres a few emulsion/air holes i always wondered if they got affected.
float level really means fuel level.
we are gonna get pretty deep into the the interaction of all things that happen in the super b.
after years of experimentation with these carbs one thing i found is fuel level and the things that effect it, is extremely pertinent to all metering. more than any other parameter.
metering is part of gettin great ALL AROUND street performance, but it aint the whole story.

after we got a good grasp of how the super does what it does we can compare it to the early and L. the design of those adds some desirable straight line acceleration characteristics the supers lack. on the other hand those characteristics can make the side bowl carbs a bit flighty over lots of miles.

the one thing about the super is its rock solid ability to hold tune over many many miles. take this thread as an example.

how may decades for this wear problem to show?
and by rigaman's own words- ive never had any probs with this carb. it has allways run great.
i wouldt be surprised if this carb is over 30 yrs old and hasnt ever been "rebuilt". i wouldnt be surprised at all.

now if you can get L series performance from it, then its a big win-win.
and you can. but you need to play with things that if not 'quite rite' will bite you hard.
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  #19  
Old 9th February 2013
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heres the machining info.


machining a steeper angle than the orig will usually allow needle to reseat in the worn seat without the need for playing with the seat fitting. if you go with the orig 30 degree and/or cut the brass seat-- the needle can drop too much.

then to get float tang to needle geometery correct again the seat needs to be cut at bowl contact face. this can get time consuming. time is money at machine shop.
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Old 9th February 2013
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the 3 different setups

the floats are the same early and mid.
but the early float tangs are bent in an arc so as to be close fitting to the needle groove. mid is flat. the close fit lifts the needle with virtually no tang to groove lash.

the needles and seats.
the mid had two different seats.


the inlet bores.


the mid and the late seats look the same. but the lates are shorter on the bowl side extension.
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