[Healeys] weber air leaks.

[Oudesluys]

If you have an air leak the Misab plates/gaskets are not positioned 
correctly. You have to measure the gaps between carb and manifold at 
various positions, they should be the same all around.
Running without these Misab plates may lead to serious damage to the 
engine, like holed pistons. Frothing should be avoided as this may lead 
to a very lean mixture at high revs.
This was apparently the problem with the old twin cam MGA. The carbs 
were fitted directly and solidly onto the manifold. Once this was 
realised, not all that long ago, there seemed to be no more problems 
when flexible fitting were used.

Kees Oudesluijs
NL


Simon Lachlan schreef op 18-4-2014 18:27:
> Before going to the rolling road, I have to cure spitting from the rear
> carb, nearest the bulkhead. I've done the old "Easystart" spray trick,
> coincidentally a recent thread, and established that there is an air leak.
> Tightening the bolts doesn't help.
>
> Now, I'm using MISAB(?) anti-froth rubber gaskets and those rubber block
> between 2 cup washer thingies to mount the carbs onto the manifolds.
> Frankly, I wasn't overly inspired by these fittings when they arrived and,
> since fitting them and having an air leak, I'm even less enthusiastic.
>
> I bought the manifolds from the States, from a supplier well respected by
> all. They are the short type with a slight "goose neck". The kit came with
> six ordinary flat gaskets, 2 per carb, for fitting carbs to manifolds. No
> mention of MISABs or rubber complications. So.....how necessary are the
> anti-froth things? Any ideas, suggestions and experiences would be very much
> appreciated.
>
>   
>
> Simon
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