XJ6 & XJ12 Series I, II & III 1968-1992

twin su 1977 xjc

 
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Old 05-31-2014, 10:35 AM
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Default twin su 1977 xjc

What model carbs are they HS6 or HS8?
 
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Old 05-31-2014, 10:44 AM
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the SU HS8 were used until 1979.
 
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Old 05-31-2014, 02:49 PM
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Good man thanks need to order a gasket set
 
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Old 05-31-2014, 05:09 PM
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Actually just a follow up I found HIF7 carbs mentioned for a 77 also. Is there any markings on the carburetor itself? Thanks
 
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Old 05-31-2014, 10:00 PM
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I doubt you got HIF in the UK.

They were "mainly" USA for emissions.

The HIF looks nothing like a traditional SU, so is easily recognised.

DOa google, it will all be clear in a few seconds.

Your HS8's will have the fuel bowl off to the side, with a plastic hose feeding fuel to the jet base.
 
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Old 06-01-2014, 08:59 AM
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See attached pics.
Cheers
 
Attached Thumbnails twin su 1977 xjc-forumrunner_20140601_145812.png   twin su 1977 xjc-forumrunner_20140601_145833.png  
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Old 06-01-2014, 06:56 PM
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They do not look like HD or HS carbies, as there is no fuel bowl on the side.

They do look like the HIF, which I have only seen in manuals, not in the flesh.
 
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Old 06-02-2014, 02:23 AM
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Hmm a tricky one the HIF are not even listed in the Haynes manual for the car the only reference I have ever found was online. Bit they do look "different"
 
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Old 06-02-2014, 02:54 AM
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I agree with Grant,they do not like HD or HS carby,s. You can see the fuel bowl Grant mentions on the side of the carby in the attached picture.

twin su 1977 xjc-dsc_8382.jpg twin su 1977 xjc-dsc_8420.jpg
 

Last edited by o1xjr; 06-02-2014 at 02:57 AM. Reason: pics
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Old 06-02-2014, 03:42 AM
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Yes definitely don't look like those carbs they must be HIF, do the stronburgs look different again?
 
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Old 06-02-2014, 04:20 AM
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Yep, definately NOT Strombergs.

I have HIF in a book in the shed and when I finish the heater tap replacement on the S Type (this could be a while, as I can barely see the damn thing), I will dig it out and see what I can see.

If its URGENT, yell out and I will find it quicker for you.

I am convinced they are HIF, and have been fitted at some stage after the car was built. Maybe it came with Strombergs (a lot did), and they were a PAIN.
 
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Old 06-02-2014, 04:43 AM
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That's ok I Can wait will order the gaskets tonight. Cheers
 
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Old 06-03-2014, 02:40 AM
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Here ya go.

The HIF exploded diagram.

This is from my book "SU Carburetters Tuning Tips & Techniques". It is from Brooklands Books PO box 146 COBHAM, SURREY, KT11 1LG, UK.

I got it 20+ years ago, so have no idea if they still exist.

SU HIF diagram.pdf
 
 
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