Doerrer(at)aol.com wrote:
>
> replaced O ring in both strombergs from rebuild kit purchased from sunbeam
> specialties. when I pulled out old large o-ring, i noticed fiberglass string
> underneath presumably to enlarge o-ring. decided not to remove ring. Has
> anybody needed to do this? Also, about how many turns of the jet adjustment
> screw from flush position are everybody's set? I think mine need more than
> three. Feedback?
I'm not an expert at much about our cars but on Strombergs I think I can
offer a couple of pointers from lots of aggravation and learning.
I'm not sure what you're refering to about the fiberglass string.
Re: the turns of the jets, you will find every Stromberg, after all these
years of use, will require slightly different adjustments as various
parts are worn, unevenly, past their original specs.
You will NEED to get a carb airflow reading tool, which should be
available for $10 or $20 from most speed or performance shops. You fit
this over the carb opening, with air cleaners off, and read the airflow
at both idle and higher RPMs. You will probably find, as I have, that
with both needles adjusted the same, the airflow will differ through each
carb. This drove me even nutsier than I normally am as I couldn't get the
airflow the same. Two carb shops couldn't tell me what the problem was.
Finally, I found out on my own that the butterfly flaps had worn
unevenly, one having a slight gap letting airflow through even when
"closed". Since I couldn't get new butterflys, I adjusted the one that
was not worn to a slightly open position (you have to do this with the
carbs off the car). This resulted in a slightly more open position than
"normal" for both butterflys at idle but gave equal air flow. Then it's
just a matter of adjusting the jet screws, using the carb air flow tool,
and your ears (for listening, not sticking on the carbs!) until you get
smooth idle and acceleration curves. You'll probably have to "average"
your adjustments...in other words, you may have to sacrifice a perfect
idle somewhat to get even air flow on acceleration and high end cruising.
I'll also tell you from experience that the Strombergs, set up properly,
give much better acceleration and throttle response than the
"replacement" Holly-Webber single carb some Sunbeamers recommend a change
over to. True, you do have to adjust the Strombergs fairly regularly, but
once you get the hang of it, this is an easy 20 or 30 minute task once a
month or two and well worth the results.
Hope the above makes sense & is of some use to you.
Good luck.
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