[Healeys] Weber air question

Simon Lachlan simon.lachlan at homecall.co.uk
Tue Dec 29 03:31:49 MST 2015

Hi again,

I've got 3 Weber 45s on my 3000.

I've just had the whole issue out and onto the floor....the three carbs,
inlet manifolds and the entire exhaust system. I was thus able to replace
the core plugs on that side and - the real point of the exercise - have the
necessary surgery done that permits proper ram pipes and decent sized air
filters to be fitted. 

OK, so the surgery's done. A very neat job. And everything is back on the

I had very short ram pipes on before and silly little gauze/wire filters
that pushed on over the pipes' trumpet mouths. They'd have stopped rabbits
getting in but wouldn't have much use for anything else.....

I didn't touch any of the carbs' settings nor did I mess with any of the
linkage lengths.

So, she still starts first time but the responses are very different. It's
got to be because the amount of air is radically(?) different??? I don't
want to go back to the rolling road unless I have to.

A couple of questions......

1)      Going from the minimum ram pipe to something around 60mm gives
faster air and that means more air.....correct?

2)      Is it safe to assume that more air weakens the mixture and that I
must enrichen it (Give it more fuel)????

3)      Also, in the great scheme of things, the readjustments will all be
fairly minimal? Just the turn of the screw!! Not likely to necessitate
swapping around with emulsion tubes etcetc???


I've managed my Webers so far by having them setup properly and leaving them
alone thereafter. (Until the surgery). I've not really grasped their
intricacies on an intellectual(?) level so far, more on a purely mechanical
level. I can do the brute force but anything more than the ignorance eludes
me where Webers are concerned. (All those interchangeable bits of



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