[Spridgets] Racer types, Carb help please!

dwoerpel at wi.net dwoerpel at wi.net
Fri Jun 8 23:48:38 MDT 2012


Lester,

These may seem like a dumb questions(it is me after all) but is the intake
manifold tight to the head?  Gasket good?  Leaks around spacers?  I've
heard of manifold nuts loosening up (or weren't tight) and the idle goes
high.  You running a PCV?  Maybe a leaky diaphragm.  Just random thoughts.

Dave W.
Burlington WI


> Rick:  Springs are in dashpots no leak apparent around throttle shafts
> Bill:  I have no idea about the needles and feel that they may have been
> altered
> Jim:   I will have to check the butterfly closing next
> Jack:  Will look for it..
> Brad:  Fixed (he says sheepishly)?  Mounted to the underside of the carb
> piston firmly.
> Dean:  Yup.  and then pushed up just to be sure
> Ron:  Yes it is, he said that these carbs worked really well and that
> someone
> else had borrowed them for a race.  Im not sure that I could inspect them
> and
> know if they were altered.  There does not appear to be any of the
> re-shaping
> of the piston itself though.
>
> Lester
>
>
>
>>
>>> Hi all,
>>>
>>> so I have this little problem with the carbs and I ask your help, but
>>> first
> a
>>> little history..
>>>
>>> I purchased this 1380 go fast engine about 2 (?) years ago. Freshly
>>> built
> with
>>> the carbs mounted.  I have never gotten around to tuning everything
>>> until
>>> recently, hat means this morning.  Messed with the timing a bit and
>>> tried
> to
>>> adjust the carbs.  I can not get them to idle slowly, hmm.. they idle
>>> at
> 3000
>>> revs.  These are later carbs for a 1275 that have been warmed over a
>>> lot
> I'm
>>> guessing.
>>>
>>> And here is my question:  Could someone have filed or otherwise altered
> the
>>> needles so much that no matter what I do the carbs could pull enough
>>> fuel
> by
>>> to idle at 3000 revs.  I have already noted that the "piston" at the
>>> end
> of
>>> the oil reservoir (the one that comes out when you check the carb oil
> level)
>>> was removed and the rod ground to a point, I have retrofitted stock
>>> ones
> and I
>>> can imagine no other scenario that would allow the high rev at idle.
>>>
>>> Yes, I have disconnected each carb from the common shaft
>>>
>>> Yes, I have backed out the idle speed screws all the way out
>>>
>>> Yes, I have confirmed that the choke is not holding the jets open
>>>
>>> Any ideas oh wizards of the SU?
>>>
>>> Lester
>>> ------------------------
>>>
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> ------------------------
>
> spridgets at autox.team.net
>
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