H4 or HS4 SU carb, which one?
Created by: dogscarf
Orig. Posting Date | User Name | Edit Date |
Jan 26, 2017 04:21AM | 1963SV2 | |
Jan 26, 2017 01:41AM | Alex | |
Jan 25, 2017 08:33PM | dogscarf |
Found 23 Messages
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Last post: Oct 18, 2020 Member since:Oct 18, 2011
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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
Total posts: 10232
Last post: Mar 26, 2024 Member since:Mar 24, 1999
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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.
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.
Total posts: 367
Last post: Jul 19, 2022 Member since:Jun 18, 2014
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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
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
Found 23 Messages