Anybody know about these. A common float on two sus

An't seen one of those...I guess its up to the Oldies

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Stop Licking the Dog...I Don't Care Who Started It

Have seen them before, not very common.
Looks like a Climax motor in an eleven, they probably mounted the float bowl to the chassis rail to reduce the engine vibrations from frothing the fuel.

I'm pretty sue they are H2's of a supercharched setup, or another form of forced induction

Or possible of an Austin A40 sports

Yep Its is from an Lotus XI. I was just wondering why and how?

Why would one float redice frothing as compared to two?

Mounting the bowl to the chassis would reduce the frothing not the number of float bowls, it does not really matter how many float bowls you have, they just have to be at the right height.

Like the soft mountings for Webers there have been a lot of different ways of arranging carbys in race cars. Ferrari used to mount the Webers on the chassis in their 52/53 F2 cars wirth a flexible hose to the motor. BRM used to mount their Webers the same way in the late 50s.
Because the SU has a seperate float bowl it means you can mount the carby solid and the float bowl soft or remote.

The Coventry Climax FPE engines had some strange vibration periods and they used to do silly things like break the starter if the engine was kept over 6500rpm for extended periods.

British engineering.....

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1964 Morris 850, 1330 Supercharged - 81.8hp atws.
1975 Leyland Mini S 1100S powered - Nice and reliable.
1977 Leyland Mini LS - Project LS-T

thats what you get when you use a fire pump motor for a race engine

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the world is a book, and those who do not travel read only a page
66 Mini Minor sponsored by http://www.lifeonthehedge.com.au/ The Dog Harness Specialists
It was a pleasure ausmini. I'll miss all you misfits and reprobates

Is this the dual choke SU (not twin su's but dual choke) I've read about but never been able to find pictures of ? I've seen references recently to someone wanting to put it back into production for some reason . Also , some early mini racers modified normal SU's to have dual float chambers , one either side to counter fuel starving on corners .

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Da linkey he workey again

There used to be a common mod in the 60s, where they would use one fuel bowl only, as it meant that the fuel height was identical for the two carbies. If you have ever had a set of twins with mismatched fuel bowls you know why! (never get them matched properly).

Don't know if this was ever a factory release?

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68 Deluxe.... it's shiny..... I like shiny!!

I figured that this was the place to stick unusual SU's.
How about these ones?

Hmmm..
M1100, that pic brings up an interesting question- if a single SU can feed a port with intermittent flow characteristics, WHY does a twin SU manifold on a Mini need a balance pipe? A Weber one doesn't ....

Vizard said the balance pipe/port intersection on a BMC twin SU manifold is the worst contributor to its bad flow. Anyone ever filled a balance pipe with epoxy to see what happens?

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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.

I have noticed that the heads with siamese ports are the ones that always use a balance pipe. (Holdens, Minis, etc.)
Former Mini racer Steve Jagger had a manifold with epoxy in the balance pipe in the 70s/80s. I almost bought it in about 83. He had filled it right up and then drilled a hole up the middle (about 7/16" or 1/2") to restore balance. He said it was the right thing to do.

Here are some more photos of some more dual choke SU's that I found on Ebay.