The Strombergs are as good as the SUs, from a drivability and performance standpoint, for all but a full-on race application.
Anything but a stock application will require different needle specs.
As you are aware, needle selection is limited for them though, and determining required needle spec is tedious. The 6J will likely get you in the ballpark, the 6W is a lot leaner.
The fine tuning is another story!
Glen
my SU needle measuring tool-
--Previous Message--
: Doug,
:
: There isn't an ice cube's chance in
: Hades that I would ever discount your
: (or soooo many other's) input!!! I'll
: take whatever you've got (or even came
: up with in a drunken stupor).
:
: Between the last post and now I came up
: with the most direct solution -
: establish a baseline. I already have
: two CDS150s with fixed 6W needles that
: ran on an emission equipped late MK1.
: So I've asked Joe to send me one more
: of those needles "and"
: pistons. I'll just engage all the
: emission systems.
:
: Now, if he has some 6J needles
: (original European configuration), I'll
: take three of those instead (and the
: piston) and run sans emission widgets.
:
: Given how much "play" there
: is with the spring loaded needles, I
: doubt there's a normal fixed needle
: inside, BUT,... that is an interesting
: idea. It would make ALL of them
: available for use.
:
: I "will" check out that
: possibly.
:
: As always: THANKS!!!
:
: Jim
:
: --Previous Message--
: I am more familiar with SU needles and
: carbs than the various iterations of
: the Stromberg pistons/needles so my
: comments will sound quite naive.
: However, I'll post them anyway.
:
: As I read your post you are dealing
: with parts availability (pistons and
: needles) which are conflicting (more
: adjustable needles to choose from but
: expensive pistons to put them in vs
: less expensive fixed needle pistons
: with a poor selection of needles).
: Does that sound right?
:
: How about these options then. Buy the
: adjustable needles and see if you
: cannot remove them from the
: "adjustable" portion. I
: doubt Burlen (or Joe C.) makes these as
: one piece threaded & tapered parts.
: It would be more economical to make
: the threaded adjustable parts in bulk
: and press the needle into them. By
: removing the adjustable portion you
: could end up with needles that will fit
: the fixed needle pistons.
:
: Also being naive, what about buying the
: basic fixed needles and turning them in
: a drill (or lathe preferably) to get
: the taper profile you want? As long as
: you need to remove material to get the
: desired profile you should be OK. This
: is a procedure some people undertake
: with SU needles to get what they want.
:
: Again, probably all naive so don't
: shoot the messenger.
:
: Doug L.
:
:
: --Previous Message--
:
: These are the factors I'm working with
: though:
:
: 1. Just for simplicity sake, I'd like
: to get rid of the emissions plumbing,
: so I'd need needles that aren't
: expecting the vacuum retard at idle,
: nor the bypass valve leaness during off
: throttle deceleration. That leaves me
: with the CD150 fixed needles, or the
: non-emission controlled overseas
: needles.
:
: 2. I "can" activate all the
: emission systems and then use later, US
: spec needles. But:
:
: 3. The adjustable pistons (which
: aren't needed) cost three times as much
: as the fixed needle pistons. So:
:
: 4. Buying another fixed needle piston
: is a viable option. However:
:
: 5. As you all know, the availability
: of fixed needles is the most limited of
: all.
:
: Ahhhh,.... The joys of ham-fisting a
: custom set-up. It "must be"
: what I live for.
:
:
:
: --Previous Message--
: "Anyway, in order to accommodate
: the
: later needles I'm going to have to dill
: out the holes in the bottom of the air
: valves (pistons) and "hope" I
: don't spin the steel inserts in the
: aluminum while doing so!"
:
:
:
:
:
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