I recommend the Mini InterNet International - MINI, for another list that
uses lots of SU's. http://members.tripod.com/~mini_digest/
Peter s
----- Original Message -----
From: Donald H. Locker <dhl@mrdog.msl.com>
To: <triumphs@autox.team.net>; <spitfires@autox.team.net>
Sent: Tuesday, August 24, 1999 5:24 PM
Subject: Re: [personals] HHE seeks pair SUC
>
> Hi to all correspondents.
>
> Thanks for the notes; I have requested an official SU parts book and
> manual from Burlen (the folks who took over the SU business, if I read
> their history correctly). My interest in finding out what engines
> these carbs were fitted to is mostly because I want to try to post to
> the right list when asking for assistance -- there doesn't seem to be
> an SU afficianado list. :)
>
> I have an intake and exhaust system, I just want to make sure I have
> all the right parts for the carbs. I already rebuilt my room-full of
> HS2 carbs, then decided they wont fit right, so its on to the H2s.
> The cylinder head has siamesed ports, FWIW.
>
> To clarify the carburettor situation a little,
>
> 1. They are definitely H2 (not HS2 or HIF2 or HD2) -- integral float
> chamber with non-pivoting brass float. Rides up and down on a
> little "post" if you will, that (IIRC) is cast as part of the
> bowl. Jet assembly is "sealed" within the carrier by two small
> sealing rings tensioned by a [compression] spring between them.
> There is no external hose from the float chamber to the jet body
> (that was an HS2 development.)
>
> 2. Both choke levers are essentially horizontal. Rear carb choke
> lever points forward, front carb choke lever points rearward.
> H-carbs lowered the jet by pivoting the lever against a link that
> was fitted on one side of the carb to a "wing"; the opposite side
> of the carb had an identical "wing" into which the jet return
> spring was attached. I've seen H-carbs where one of the choke
> actuating levers was horizontal, and the other had a dog-leg going
> down; both of mine are like this (please use your imagination;
> this is looking straight into the inlet of the rear carb, with the
> air cleaner rendered transparent)
>
> v====== this is the carb throat, see the piston?
> o ( ) o <====== these are the two little "wings"
> spring = I |
> = I | choke cable lifts here (at the "o")
> o--x--o-----------o <======= this is the lever; jet
> attachment is at the "x"
> \
> \== lever pivots here, against the | link, causing
> the spring to be elongated and the jet to be pulled down.
>
> 3. The throttle return spring is only on one carb (the rear) and is a
> torsion spring, wrapped around the throttle shaft.
>
> 4. I also have HS2 carbs, but they won't fit too well on the manifold
> (insufficient clearance to the exhaust header).
>
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