Ok it's a contentious question but with a single dcoe can you replace the soft mounts with those plastic type mounts such as su carbs between the carb and manifold?

Any disadvantages such as alleged fuel agitation from increased vibrations transferred through to carb?

The SU's work completely differently to a side draught Weber.
The phenolic spacer for the SU is a heat insulator.
I wouldn't advise not using the soft mount for the DCOE.

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Regards, Graeme
Just trying to help...
http://nissanman.shutterfly.com/
graemes@internode.on.net

Excellent advice. A friend had quite a few problems with a side draught 45mm Weber on his 200B recently, which was mostly fixed by fitting a soft mount kit.

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green200b - aka Alistair

The fleet:

Australia:
'80 200B GX - the green200b - hibernating
'81 RX-7 - 12A extend port - daily
'74 RX-2 - 13B bridgeport - cruiser

Europe:
'93 200SX - CA18DET - tourer

As far as I'm aware you should always use rubber mounts with side draught webers... I'm no expert, just what I have been told over the years...

What kind of problems does not using the soft mounts cause?
I haven't got any on mine and it runs nice but maybe I'm not noticing something.

Usually the engine vibration will aerate the fuel inside the carb. which I'm guessing would result in poor performance.
The mounts would also act as a heat barrier of sorts.

_________________
Regards, Graeme
Just trying to help...
http://nissanman.shutterfly.com/
graemes@internode.on.net

I have seen a weber dcoe crack the cast alloy mountings and fall off using the hard phenolic spacers.
This was on a rally car, but still could happen on a road car i guess

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Circuit Race 1600 in the build

From memory the alfa's never had soft mounts.