[Healeys] Weber manifold related queries

[Chris Dimmock]

Hi Simon,
Here are my thoughts...
1. I think you mean a balance pipe, which is typically only required when one
carb feeds more than one cylinder.
Triple webers are effectively one throat, via one runner, per cylinder.
Therefore no balance pipe is required. I have never seen a triple weber
manifold for a 6 cylinder engine that has balance pipes between the individual
manifold runners
2. I don't think it matters. Again, most weber manifolds have one hole for
vacuum. Use the one off your SU manifold.
Bonus answer 3.... Before you ask..
You can't have vacuum advance if you have a Lucas distributor with triple
webers, so don't worry about connecting that up....
Best
Chris


Sent from my iPhone

> On 15 Jan 2014, at 7:04 am, "Simon Lachlan" <simon.lachlan at homecall.co.uk>
wrote:
>
> Hi,
>
> It might not have escaped your collective attention that I'm in the throes
> of installing 3 Webers in my 3000. I have yet more questions........
>
>
>
> 1)      I note that my MKII BT7 (tricarb) has a 3 way breather tube linking
> its three, currently fitted, individual inlet manifolds. Furthermore, BMC
> attached sufficient thought to this breather business as to actually
> increase the size of said breather tube during MKII production. Yet the
> manifolds which I've just purchased have no provision for a breather tube.
> What do you think?
>
> 2)      My car has a factory fitted servo so I need a vacuum feed for that.
> The manifold plug hole, pre-drilled in one (only) of the manifolds, is
quite
> small. How big a pipe does one need to keep the servo happy?
>
>
>
> Thank you,
>
> Simon
> ___________________