I do not know why SU's get such a bad reputation. Possibly because
they don't *look* like an American carburetor?
The SU type carb is essentially the same as the CD (Constant
Depression) type carbs used on most (high performance) motorcycles
until *very* recently (when emissions regulations have forced
manufacturers to EFI). They are really very good carbs.
I have a set of SU HS4's on our 1978 MGB. Once properly set up &
adjusted they are not finicky. And they are not difficult to set up &
adjust - just different!
----- Original Message -----
> Date: Wed, 30 Aug 2006 13:52:42 -0600
> From: "Scott Bonacker" <email@example.com>
> Subject: Carburetion
> I've been planning for a carburetor upgrade on my '77 B car from the
> original single ZS, looking at the information available on the
> internet and
> finally bought the book on power tuning.
> The downdraft Weber was looking pretty attractive because of what I
> read about the need to maintain and occasionally rebuild the SU's,
> but the
> power tuning book doesn't even mention the downdraft Weber, and only
> mentions the sidedrafts in the context of racing.
> There may be a compare and contact between Su and Weber carburetors
> that I
> haven't seen, so any suggestions and/or links would be appreciated.
> Scott Bonacker