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nathanm
 Post subject: Best Carb
PostPosted: Tue Aug 30, 2011 7:07 pm 
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998cc
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Joined: Sat Jun 24, 2006 6:23 pm
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Location: melbourne
just trying to figure out what carb would suit my engine best
it is a 1100s motor pretty well stock as far as I'm aware
so what would give me the best performance (without body mods)?

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gafmo
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PostPosted: Tue Aug 30, 2011 7:24 pm 
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Location: Baulkham Hills
1 1/2 SU would be a good starting point. No mods required

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drmini in aust
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PostPosted: Tue Aug 30, 2011 7:25 pm 
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Joined: Fri Mar 19, 2004 6:19 pm
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Location: near Baulkham Hills, NSW
Either an HIF44 or an HS6 SU, on either an MG Metro or Minispares manifold.

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Davo111
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PostPosted: Tue Aug 30, 2011 7:26 pm 
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Location: Werribee Vic. RETIRED - VMCI 3225 ,
They originally came out with 1 1/4 SU, single, so the engineers that designed the motor back in the late 60s must have known that would be sufficient for normal operation. :wink: :wink:

Twin 1 1/4 SU was always the first mod for a little more power, but the single is just fine. :wink: :wink: :wink:

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drmini in aust
 Post subject:
PostPosted: Tue Aug 30, 2011 7:32 pm 
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Nope the 1100S (1275) all had an 1-1/2 stock, not 1-1/4...

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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Morris 1100
 Post subject:
PostPosted: Tue Aug 30, 2011 7:37 pm 
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I think the main reason for fitting twin carbys on the improved models was appearance.
Sure it will improve performance over a single 1¼" but the main thing was how it was perceived by the public.
A 1¾ will perform as good as two 1¼ but it will not look like it does.
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nathanm
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PostPosted: Tue Aug 30, 2011 7:54 pm 
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998cc
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Location: melbourne
yeah cool
i have a set of twin 1 1/2's that need to be rebuilt and was just wondering whether to stick with these or go down the hif44/hs6 route as what i have heard is that they are just as good

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drmini in aust
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PostPosted: Tue Aug 30, 2011 8:08 pm 
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Rebuilding twin SUs properly (if paying for it) costs serious $$$ now. And IMO twin 1.5s are overkill on an otherwise stock 1275.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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1275LS
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PostPosted: Tue Aug 30, 2011 8:54 pm 
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Location: Brisbane northside
I'm not an expert but my 1275 hoots along stock with a HS6. I gather it is a lot simpler than trying to tune twin carbs too.

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1275LS - July 78 - XNFAD18Y/102918
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1098
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PostPosted: Tue Aug 30, 2011 9:33 pm 
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848cc
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Joined: Thu Jun 16, 2011 10:23 am
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Location: Balmain NSW
by far the ultimate carburettor is a Weber.
The SU supposedly will wear and give you great dramas after 10-20,000km. Not worth the hassle.

Or something... :?
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drmini in aust
 Post subject:
PostPosted: Tue Aug 30, 2011 9:45 pm 
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1098 wrote:
by far the ultimate carburettor is a Weber.
The SU supposedly will wear and give you great dramas after 10-20,000km. Not worth the hassle.

Or something... :?

Cheer up... :P
I don't hate SUs...
Here's what's going back on my 1412 when it's in the wife's van... HS6, ported Minispares manifold with 20mm spacer.
Image

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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mattsmadmini
 Post subject:
PostPosted: Tue Aug 30, 2011 9:58 pm 
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Milatsmadmini
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Location: the inner west of sydeney!
1098 wrote:
by far the ultimate carburettor is a Weber.
The SU supposedly will wear and give you great dramas after 10-20,000km. Not worth the hassle.

Or something... :?


Image

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min16i
 Post subject: Which Carb?
PostPosted: Wed Aug 31, 2011 9:59 am 
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848cc
848cc

Joined: Wed Dec 01, 2010 2:11 pm
Posts: 120
Location: Goulburn NSW
Hi All,

My two bob's...

although I love the twin's on my Landcrab I'm going to put a single on my Mini, fiddling with one set of twin's is enough :D

Ian

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