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Post by indianajones on Feb 12, 2012 1:54:56 GMT
Oh - in theory, any HS6 spec carb could be set up to 1800 spec. The basic body unit is "universal", so re-jetting, re-needling and fitting the correct damper spring would produce a suitable carburettor. 1800 Princess engine was still a transverse "B" series, so almost an identical motor. Tommy has some experience along this line. Chris. That's the thing I mentioned above, Indy. So long as the basic body unit of the carburettor is sound, you can add jets, needles and spring to make it into anything you want. Chris. Yea I had a feeling that was the case, of them being a base unit with the needles and jets being interchangeable. Bloody annoying having to order more parts but ahwell, such is the joy of classics  Keen to find out if it's a princess motor etc now. -Andrew |
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Post by threelitre on Feb 12, 2012 22:45:28 GMT
The auto carb usually just has a different needle, so you should be fine if you get the correct needle for a manual. I once had an auto-spec carb on a Maxi and the decrease in mpg due to the richer needle was quite noticeable. I had waxstats on my Maxis, but changed them to older spec carbs because the throttle spindle was worn and the old type was cheaply available as factory fresh units. My wax-stat jets worked fine and were actually a small improvement (similar to the bi-metal spring in the HIF series).
The old needle looks fine on this picture. The spring loaded one will have a little wear in this edge, but that is not problematic. if there is wear on the jet, widening the diameter, that is the problem when a carb will not be tuneable in any way anymore.
Regards,
Alexander
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Post by indianajones on Feb 12, 2012 23:45:45 GMT
Cheers Alexander. With regards to the needle size, I'm a bit confused, as I'm led to believe they're different types. The needle I have is a ZH which acording to Chris and Burlen is what an auto set up should have. My workshop manuals suggests that a ZH works on a Mk. II car (but doesn't state if that's for manual or auto) What needle and jet would I need for a manual ? Edit: well browsing SU I see a kit for the Princess HS6 has the floating needle and Waxstat jet....hmmmm www.sucarb.co.uk/CarbEssentials.aspx?ProductId=11527Also scroll down to the bottom of this page www.bluestreaksix.com/Austin1800/Page11.htmlThe Mk. II engine (ECE, which I'm guessing is emission contro letc) had a BBF needle, which I believe if the floating type. Most of The Mk. II's (manual and auto) used a ZH it seems. Reckon it's worth using the ZH or should I use something else? I'll use a floating needle if it's easier, what are the advantages etc? Cheers, Andrew |
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Post by threelitre on Feb 13, 2012 0:34:12 GMT
ZH and BBF are very similar (look them up here: www.mintylamb.co.uk/suneedle/ ), I doubt the average motorist will notice a difference between these two. I always thought ECE stood for the European market model, often fitted with tweaked needles due to emission regulations. I would use the spring loaded needle, as it does not need careful centering, it is also a little more precise in metering under low load, as the shape of the opening is not a very narrow ring, but sort of quarter moon shaped. That little bit of wear where it slides up and down the jet will not cause problems before the throttle spindle is worn out anyway. Regards, Alexander |
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Post by Penguin45 on Feb 13, 2012 0:47:31 GMT
You're going to have to make a call here, Indy.
Going by the year, 1970, you should have a ZH needle (AUD1490ZH), matched with an AUD9148 jet 0.100". The BBF needle ('71-'73) on the ECE (Emission Control Engine) will almost certainly produce a leaner setting to reduce pollution but will reduce performance accordingly.
In this particular instance, the auto and manual carbs share the same needle/jet combination for 1970; the BBF needle still uses the AUD9148 jet.
About the engine, BTW, pop up the number (plate above and between cylinder 2 + 3 ) and I might be able to find out where it came from.
Chris.
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Post by indianajones on Feb 13, 2012 0:51:17 GMT
What that new info from you Chris, and thinking back I have had some issues with the running of the engine, namely in hot weather around the local streets, going to ZH might be better.
Ok back to old plan of attack, convert to ZH with non waxstat. Best option at the moment seeing as I have the new needle and jet.
Hmmm will get that engine no. aye.
-Andrew
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Post by Penguin45 on Feb 13, 2012 1:15:04 GMT
Don't know if this will work or not - you might need eyes like a hawk or a magnifying glass.........  Austin 1800 info.   Wolseley info. You can always go here: s2.photobucket.com/albums/y2/Penguin45/ - think you can blow the images up as big as you like then. Chris. |
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Post by indianajones on Feb 13, 2012 1:34:13 GMT
Thanks a bunch Chris,
Can't see the Austin table, but the Wolseley one is just like the SU site, it has two autos listed but no manual (only 'S')
Edit: I just re-read your previous post and see auto and manual share the same, they could make that a bit clearer on the tables and sites etc!
So being the logical man I am I got the kit for the wolseley one that matched my carb number (AUD291)
Ok I'm gonna go with what I've ordered (ZH and standard jet).
Cheers everyone, hopefully I might be able to source what I need locally, will find out this week, if not, back to Burlen.
-Andrew
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Post by threelitre on Feb 13, 2012 1:54:05 GMT
If the SU-compare-o-meter is right, than ZH is a little bit richer than BBF at low and wide throttle openings. BBF is a bit richer in the mid range, but not a lot (in fact the thinnest needle in the middle at station 7 of all the single carb needles listed for the 18/85).
Regards,
Alexander
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Post by indianajones on Feb 13, 2012 1:56:30 GMT
That website you sent Axleander was awesome, gonna keep that in my bookmarks _b
-Andrew
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Post by indianajones on Feb 15, 2012 4:41:05 GMT
Chris,
Sorry for the delay, have been busy preparing an AutoCAD training session I need to give next week, but here is the engine number.
18H AA-H41 062
Also regarding the carb rebuild, SU have replied to my e-mail, very helpful and have told me what I need to order. Very pleasant company to deal with it seems, compared to some of the drop kicks I have to deal with here anyway. But that's a rant I'll spare everyone!
-Andrew
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Post by indianajones on Feb 28, 2012 6:46:21 GMT
Edit: dw, got it sorted I think!
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