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[Healeys] Weber air question

To: "'Healeys, Forum'" <Healeys@autox.team.net>
Subject: [Healeys] Weber air question
From: "Simon Lachlan" <simon.lachlan@homecall.co.uk>
Date: Tue, 29 Dec 2015 10:31:49 -0000
Delivered-to: mharc@autox.team.net
Delivered-to: healeys@autox.team.net
Thread-index: AdFCJCAeNQ7Enz5bStGgpbxYeK4o8A==
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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
engine.

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
brass.....)

Thanks,

Simon


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vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal>Hi =
again,<o:p></o:p></p><p class=3DMsoNormal>I&#8217;ve got 3 Weber 45s on =
my 3000.<o:p></o:p></p><p class=3DMsoNormal>I&#8217;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 &#8211; the real point of the exercise &#8211; have the =
necessary surgery done that permits proper ram pipes and decent sized =
air filters to be fitted. <o:p></o:p></p><p class=3DMsoNormal>OK, so the =
surgery&#8217;s done. A very neat job. And everything is back on the =
engine.<o:p></o:p></p><p class=3DMsoNormal>I had very short ram pipes on =
before and silly little gauze/wire filters that pushed on over the =
pipes&#8217; trumpet mouths. They&#8217;d have stopped rabbits getting =
in but wouldn&#8217;t have much use for anything =
else.....<o:p></o:p></p><p class=3DMsoNormal>I didn&#8217;t touch any of =
the carbs&#8217; settings nor did I mess with any of the linkage =
lengths.<o:p></o:p></p><p class=3DMsoNormal>So, she still starts first =
time but the responses are very different. It&#8217;s got to be because =
the amount of air is radically(?) different??? I don&#8217;t want to go =
back to the rolling road unless I have to.<o:p></o:p></p><p =
class=3DMsoNormal>A couple of questions......<o:p></o:p></p><p =
class=3DMsoListParagraph style=3D'text-indent:-18.0pt;mso-list:l0 level1 =
lfo1'><![if !supportLists]><span style=3D'mso-list:Ignore'>1)<span =
style=3D'font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span><![endif]>Going from the minimum ram pipe to something =
around 60mm gives faster air and that means more =
air.....correct?<o:p></o:p></p><p class=3DMsoListParagraph =
style=3D'text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if =
!supportLists]><span style=3D'mso-list:Ignore'>2)<span =
style=3D'font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span><![endif]>Is it safe to assume that more air weakens the =
mixture and that I must enrichen it (Give it more =
fuel)????<o:p></o:p></p><p class=3DMsoListParagraph =
style=3D'text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if =
!supportLists]><span style=3D'mso-list:Ignore'>3)<span =
style=3D'font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span><![endif]>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???<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>I&#8217;ve managed my Webers so far by having them =
setup properly and leaving them alone thereafter. (Until the surgery). =
I&#8217;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 =
brass.....)<o:p></o:p></p><p class=3DMsoNormal>Thanks,<o:p></o:p></p><p =
class=3DMsoNormal>Simon<o:p></o:p></p></div></body></html>
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