[Healeys] Setting SU HD Carburettors

[BJ8 Healeys]

Derek, the procedures I wrote are titled:  "Adjustment of the HD8 Carburetor
for the BJ8".  There was no attempt to include procedures for any other
model of HD8 carburetor used on any other car.  Although I did not know that
HD8s of other models were used on Aston Martins, Jaguars, etc., I presume
most people on our list who are interested in the procedures have a Healey
and the AUD124s.  If a car has HD8 carbs from a non-BJ8, then the procedures
probably do not apply to them - at least, in a way so as to avoid confusion.
Having been involved in developing technical procedures and manuals
throughout my engineering career, I know that when too many different models
are covered by the same manual, there is a lot of opportunity for the
procedures to become more confusing than helpful.  I found that true of the
SU manual and that was my motivation for re-writing the procedures.
Originally, I did it for my own use.
 
Steve Byers
HBJ8L/36666
BJ8 Registry
Havelock, NC  USA
 
From: Derek Job [mailto:derek.c.job at gmail.com] 
Sent: Saturday, August 18, 2012 4:52 AM
To: John Sims
Cc: BJ8 Healeys; Forum
Subject: Re: [Healeys] Setting SU HD Carburettors
 
I just leafed through the entire Burlen (SU) parts book.
 
Regarding HD8 Carburettors. Only one type is listed for Austin Healey
MkIII's. That is AUD124. (Presumably this does not have throttle screws)
 
There are however many, many varieties of HD8 carbs.
 
6 different types are listed for Aston Martins, Bentley and Rolls Royce have
about 10 varieties while there are over 20 varieties of HD8s listed for
Jaguars. 
 
Presumably throttle adjusting screws are installed on some of the above
types, hence the reference in the SU workshop manual. 
 
Derek