I have found the HIF carbs to be "bonus-carbs" on Minis, the temp correctiuon
on the jet and the sprung needle are + points but the sprung needle carves up
the jet (15-20k repacelment interval?).
The 44 or 6 designation refers to the width of the throttle opening so a HIF6
would look on the outside like a HIF44 but it would have a wider bore
(therefore more airflow) (number is part of a fraction).
Problem with the HIFs (maybe just on a mini) is vapour lock as the float
chamber is "nearer" to the exhaust than on Hs and HSs...
scenario slow moving traffic....petrol vapourises, clog (hammer) down when
it clears and the colder fuel fools the jet adjuster and you get a blast
of high temp vapour....Gary Gabelich (sp.) eat your heart out.
If you are buying new or secondhand HIFs for making a twin set, try to get the
throttle linkages for the cable that have a cam rather than a simple lever,
the cam type (as used on the UK Metro) gives a far more progressive throttle.
If the MG Metro (sad BL attempt at an MG) or Maestro reached the US they have
HIF44/6 as standard but not r/l pairs (ha ha Rolls Royces run 2 x HIF8s!)
Rover SDI/VandenPas and some Jags have them, any A series and some O Series
used them.
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