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Home > Help Needed / General Tech Chat > quick HS4 carb q

joeybaby83

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Isle of Man

Are they all the sprung typeor some fixed needle?

Cheers

Joe

Edited by joeybaby83 on 10th Sep, 2008.

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"



Rod S

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The early ones were always fixed needles with an ajustable jet retaining tube (to centre the jet around the fixed needle).

Burlen still have the manual for them on their website
http://www.sucarb.co.uk/Technical.aspx?id=35

Schrödinger's cat - so which one am I ???


joeybaby83

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the early hs4's or just early carbs in general?

What is the likelyhood an 87' car would have a swinging or fixed badboy?

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"



Brett

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an '87 carb should have a swinging or 'sprung' needle *wink* if u can post a pick that would help

Yes i moved to the darkside *happy*

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joeybaby83

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Isle of Man

i can tell the difference, just cant be arsed driving 5 miles to take the dashpot off lol

ill order the swinging needle type and see how it goes

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"



Rod S

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Rural Suffolk




On 10th Sep, 2008 joeybaby83 said:
the early hs4's or just early carbs in general?

What is the likelyhood an 87' car would have a swinging or fixed badboy?


From dim and distant memory, all sizes of the early HS were fixed needle. In my youth, I centred many jets....

The change to sprung loaded needle was all to do with emissions (long complicated explanation.......) but by the mid to late 80s, wasn't everything HIF by then anyway ???

Last example of an HS that I have is my son's 84 Mini and that is sprung needle, and a spare carb from a car of the same age (also sprung needle) but of course you never know the real history - parts may have been changed....

Schrödinger's cat - so which one am I ???


Paul S

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Formerly Axel

Podland

They were still using HS4 carbs on all the 998 Minis up to at least 1990.

All of ours have the sprung needle.

They started using the sprung needle before 1982 because it's shown in my old Haynes manual.

Edited by Paul S on 10th Sep, 2008.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."


Rod S

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Rural Suffolk




On 10th Sep, 2008 Paul S said:
They were still using HS4 carbs on all the 998 Minis up to at least 1990.


Interesting.... Good old Leyland/Rover must have been different between the Minis and the Metros at that time then - our doner "E" reg 998 Metro had the HIF38 (which I deliberately swapped to an HS4 to keep an 83 Mini "authentic").

Schrödinger's cat - so which one am I ???


miniminor63

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Oslo, Norway

if you get a needle for the sprung carb and you find it to be a fixed needle carb, just remove the collar on the needle and use it :)

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