[ROVERNET - UK] Thanks for the help: SU carbs, stuck clutch.

[Slatskars]

Paul, is that a single or dual set on the 2000? I believe the TC model is
dual, but do not know the sizes.

I am much more familiar with MG needs and models. My only Rover is a 3 ltr
with a single HD8. I have vehicles with at least one of each type of SU. Do
not have a AED however.

Slats
----- Original Message ----- 
From: "Paul Smith" <Paul.Smith at auroraenergy.com.au>
To: <rovernet at lyris.ccdata.com>
Sent: Sunday, July 04, 2004 8:35 PM
Subject: RE: [ROVERNET - UK] Thanks for the help: SU carbs, stuck clutch.


> 2000s use 8s not 6s.  i have always thought this was a mistake on Rover's
> part.
> The 2200s used 6s, and they could have used 8s!
>
> PVS
>
> -----Original Message-----
> From: Slatskars [mailto:slatskars at comcast.net]
> Sent: Monday, 5 July 2004 1:22 pm
> To: rovernet at lyris.ccdata.com
> Subject: Re: [ROVERNET - UK] Thanks for the help: SU carbs, stuck
> clutch.
>
>
> No, there is quite a difference between an HS8 and an HS6. The number
refers
> to the size of the diameter on the manifold end of the carb body. The
number
> is the number of 1/8 inches over 1 inch. A 6 is 6/8 or !-3/4 inch, an 8 is
> 8/8 or 2 inches in diameter, etc. Jet and needle size would be governed by
> the particular engine specifications. Thus you could have an HS6 in
several
> different vehicles with different jets and/or needles. The needles and
jets
> can be changed but the bore size of the body is fixed. Normally the larger
> the engine in CC's the larger the bore. For example a MG midget 1275 uses
> HS2, and an MGB 1800 uses HS4, Rover 2000 would use HS6. The Rover 3ltr
> (3000) uses one HD8 in standard configuration. In order to increase the
size
> of carburetor, you must also change the intake manifold to match. There
are
> four different types of SU carbs. The early H type for Horizontal, the HS
> which is very similar but uses a different type of float and jet
> arrangement, the HD which uses a Diaphragm, and the HIF which uses an
> Internal Float. You can for example interchange between a HS4 and an HIF4
> for a MGB if the linkage will work and the needles and jets are properly
> sized. Hope this helps. This is not rocket science by any means.
>
> I have been working on an interesting project for a friend who has a late
> 1500 CC MG Midget. We managed to obtain UK spec. SU's for this engine to
> replace the single Zenith/Stromberg. They came complete with the
manifolds,
> but the jet assembly is entirely different than any US spec car. It would
> however be a simple matter to change it over to a US spec HS jet assembly.
> The dome and piston are also different, but could be changed over easily.
> The body is the same, which makes for some interchangeability. As in why
> reinvent the wheel?
>
> SU carbs are quite basic units and pretty good trouble free devices once
set
> up properly. Needles are available to give leaner or richer parameters for
> different applications such as high altitude or racing. They are very
> interesting and flexible. Very little to wear except the throttle shaft
and
> their bushings.
>
> Slats
> Vancouver, WA, USA
> ----- Original Message ----- 
> From: "T. Clemen" <tclemen at msn.com>
> To: <rovernet at lyris.ccdata.com>
> Sent: Sunday, July 04, 2004 5:04 PM
> Subject: [ROVERNET - UK] Thanks for the help: SU carbs, stuck clutch.
>
>
> > Thanks all, I will keep you posted on what works and how everything
turns
> > out.
> > As far as the carbs go; is the only difference between a HS8 and a HS6
the
> > needling and or jet size?  I would like to know if the front float
chamber
> > lid is interchangable with another BL auto or if I am stuck repairing
the
> > one I have.
> >
> > Thanks again for all the help!
> >
> > Tom C.
> >
> > PS for anyone wondering the Burlen site is "www.burlen.co.uk"
> > this was a great site and very helpful.  Thanks Roar.
> >
> >
> >
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>
>
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