Rich Mason wrote:
>
> At 06:04 PM 6/14/97 +0000, you wrote:
>
> >For mixture adjustment I just use lifting pins and the Mark I ear. I
> >tried colourtune some years ago but it seemed to only give a coarse
> >indication. I also used a vacuum gauge, but found that of far more use
> >when adjusting timing.
> >
> >
>
> Paul -
>
> Would you care to elaborate on the use of a vacuum gauge for timing - what
> are you looking for - maximum vacuum - or steadiest needle?
>
> Regards,
>
> Rich Mason
> '73 MGB
> Huntsville, AL
> __________________________________________
> e-mail--> rmason@ro.com
> WWW-----> http://ro.com/~rmason
> MG Page-> http://ro.com/~rmason/mgpage.htm
> __________________________________________
Hi Rich - it's going back quite a few years now, but I think mixture was
adjusted for maximum steady reading. Since then carbs from mid 70s
(here in the UK at least) seem to be just backed off into lean from
maximum rpm. Timing was - advance it till you see an occasional misfire
then back it off 3/4 in Hg (from memory). This was the one that made
the difference (for mixture you don't need any gadgets, just an ear). I
had a Morris Marina under warranty at the time, and the first job after
a dealer service was to re-adjust the timing using the gauge, the
increase in performance (whilst being relative!) was noticeable, as was
the mileage. Another gain was the use of a cold air pipe from in front
of the radiator right onto the air cleaner intake.
Cheers,
PaulH.
Cheers,
PaulH.
|