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 H4 or HS4 SU carb, which one?

 Created by: dogscarf
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 Posted: Jan 26, 2017 04:21AM
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Special tuning sold hs4s back in the day... (where mine came from).... H4s were used because the regulations did not allow a manifold change and H4s use the same (vertical) mounting points as the Hs2 whereas the HSs have diagonal mounting points... Cheers, Ian

 Posted: Jan 26, 2017 01:41AM
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GB
H4s are the "correct" thing to fit if you're an anorak.  They are also a PITA to work with...

HS4s with a fixed jet are perfectly adequate, and much nicer to live with as they have a civilised choke mechanism and better float bowls.

 Posted: Jan 25, 2017 08:33PM
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Fellow Minioids,  I have two Mini Cooper S's a 1967 and 68.  I want to go up from the two 1.25 to two 1.5 SU and try it out.

 Question:  I have many SU HS4 carbs lying around so why couldn't I just use two of those from an 1962 Austin Healey 3000?  They do have offset mounting flanges.  I noticed that the H4 has two parallel mounting holes on the flange.  They also have a convoluted brass choke arm.  I was on another Mini forum and they turned up their nosed at the HS4 carbs.  Is this legitimate?  Is their a significant difference.  They appear much the same to me.

Dogscarf

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