22 replies to this topic

[monkey]

so I found a pair of su's in the back of the garage that I brought years ago, here are some pics...









I have a few questions, firstly, is this manifold suitable for use on a mini? If not, any ideas as to what it's from?

Secondly, the float chamber lid is missing for the left hand carb, are these easy to replace? Are they a standard part or are they "sided"?

If so I might refurb them as a little winter project

Is there any value to these?

Thanks in advance


Steve

[carbon]

Looks like a mini manifold.

 

The metal tag on the float chamber should have a number such as AUD123 stamped on, post this up as it will tell you what they originally came off.

[eean]

Hi Steve they look like they are a mini set, the heat plate is not the same as the solid plate on my midget, you can get all sorts of spares for em including the float tops, but sometimes it's easier and cheaper to buy returned ones as I've done for the midget. You can buy rebuild kits for around 100? You could get an old 11/4 su and use the float top from that

[monkey]

Hiya thanks for the replies I will get the number from the tag on the float chamber tomorrow

A second hand 1 1/4 sounds like a good idea for the float chamber, had a look on mini spares, rebuild kits don't look too expensive

[dklawson]

According to the thread linked below, the manifold (12G299) is for an MG-1100 and has the wrong angle for use with a Mini.  From what I remember, there are issues with the carbs fouling the bulkhead.

http://mk1-forum.net...opic.php?t=1882

 

The carbs themselves can be used on a Mini manifold as can the heat shields and linkages.  As you have discovered visiting the Burlen site, there are many different HS2/HS4 bowl lids available.  Buying used is a good idea to save money BUT there are things to watch out for.  You want bowl lids that have their inlets positioned for easy connection to the supply hoses and you want to have the floats swing forward and back as opposed to left and right.  There are anecdotal accounts of people going into hard turns where left-right swinging floats closed off the fuel supply prematurely causing fuel starvation.

[Spider]

Mmmmm,,,,, I'm not so sure on that info from the MKI forum, Doug.

 

The MG1100 had a transverse Engine like the Mini and the Carbs were mounted at the same angle as a Mini (30 Degrees) and looking at the pic of the manifold ^ it does look 'flatter' than 30⁰.

 

The Inline Engines as fitted to the likes of the Sprite and Midget had different angles to a Mini, I think - and don't quote me - these were 10 or 15⁰ ie, considerably 'flatter' than a Mini and those Manifolds don't readily fit on a Mini. They also needed different spacers for the float bowls or if one piece, as you have pointed out, different float bowls, to ensure the fitted angle of the bowl ends up right.

 

Also, the Vacuum Take Off (plugged on these) coming off at that angle, I have to say, I've not seen anything like that on a transverse engine, not to say they weren't fitted though.

 

I think they are for an In-line Engine.

Edited by Moke Spider, 20 August 2015 - 09:18 PM.

[timmy850]

It's an interesting air filter stup on it too. Normally the pancake filters would bolt directly onto the carb without the elbow pieces

[dklawson]

Mmmmm,,,,, I'm not so sure on that info from the MKI forum, Doug.

 

The MG1100 had a transverse Engine like the Mini and the Carbs were mounted at the same angle as a Mini (30 Degrees) and looking at the pic of the manifold ^ it does look 'flatter' than 30⁰.

 

 

No argument about the MG-1100 using a transverse A-series engine.  However, the sources I have found say that the MG-1100 had the carbs mounted at a 10 degree angle, not 30 like the Mini.  I remember some people on old Mini Mania threads saying that the float bowls could/would foul the bulkhead.  However, I've seen another (single source) that says the carbs won't foul.  I defer to others on that issue.

 

http://mk1-forum.net...pic.php?t=11239

[timmy850]

Looking at this photo it is a 30 deg manifold and fuel bowls too. The fuel bowl angle is parallel to the manifold face.
 

 

Edit:

Check out the post 25th Feb 2007. It has the angled vac port, 12G299 part number. 

http://www.spridgetm...82623/1/81/span

Edited by timmy850, 21 August 2015 - 02:14 AM.

[Spider]

Doug & Timmy, thanks for the links, great info there.

 

Timmy, you beat me to it - in part!

 

 

I would actually say now! that it is more likely a 30 degree manifold.

 

Doug, I think I did read a post (or posts?) somewhere in that which they also say the 30 degree manifolds were only fitted to Transverse Engines, and that the shallower angled ones were not.

 

After reading those links, I am inclined to agree it could be a set from an MG1100.

 

The info in the links also confirmed what I thought I was seeing earlier and wasn't sure - the Carbs are closer together than on other TC Manifolds. Interesting.

[timmy850]

The 1100 carbs were fed from an airfilter "manifold" that had a single inlet hole like this one, that's probably why they are closer together??

[monkey]

I wasn't expecting to start such an interesting discussion!

So if it's a 30degree manifold, would it be ok to use on a mini?

Is this the tag you were talking about?


It reads AUD69R, there isn't one on the other carb (float bowl lid is missing along with screws) does this mean anything to anyone?


Here is another picture of the air filters, they are not pancake filters, they appear to be standard filters with a homemade metal plate to cover the holes that would be at the top and screw them down.

Steve.

[timmy850]

AUD 69R is from an MG1100. The left carb would have been AUD 69L
http://sucarb.co.uk/...spares/id/1659/

[jaydee]

The manifold is off an MG1100 

Its a 20 degs manifold, shorter and with a smaller balanca pipe compared to mini manifolds, it can be fitted to a mini but it requires the skills to do that (requires modifications to throttle linkage and heatshields)

Its also very important that the float chambers are set to 20 degs aswell

[monkey]

Cheers for the replies, excuse my ignorance, but why would it need modifications to the linkages and heat shield? The only reason I can think is clearance issues, Surly if it came of an a series then it's not gonna foul on the exhaust, the only other thing would be the bulkhead, but again it doesn't look like this would be an issue?

Steve