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76van
PostPosted: Thu Jul 29, 2010 8:52 am 
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Location: blue mountains, nsw
have a 45dcoe weber on my 1275 & can`t see anywhere to run the vaccum advance to. there are no vaccum ports on the manifold.

was thinking i might have to drill & tap the manifold unless anyone has another idea.

all help appreciated
jayson
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awdmoke
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PostPosted: Thu Jul 29, 2010 9:00 am 
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Location: Rockingham - Collie WA
Forget the vacuum advance with a Weber.
You won't get enough decent negative pressure for it to work.

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76van
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PostPosted: Thu Jul 29, 2010 9:19 am 
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ah ok, thanks for that
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slide
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PostPosted: Sun Aug 01, 2010 6:28 pm 
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998cc
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Joined: Tue Sep 06, 2005 1:26 pm
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Location: Adelaide
Yeah, ditch it. Real Men don't do vac advance!

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Morris 1100
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PostPosted: Sun Aug 01, 2010 6:32 pm 
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Vacuum advance is a fuel economy device. A weber isn't. 8)
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drmini in aust
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PostPosted: Sun Aug 01, 2010 6:44 pm 
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Location: near Baulkham Hills, NSW
Morris 1100 wrote:
Vacuum advance is a fuel economy device. A weber isn't. 8)

Show me a performance engine that uses vac advance..
Alfa twincam? Nope-
Fiat/Lancia twincam? Nope-
Cooper S? Nope-

If you have a decent duration cam in your A series, vac advance will do SFA anyway, even with an SU carb. So saith the cam grinder man with the engine dyno. :wink:

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76van
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PostPosted: Mon Aug 02, 2010 9:18 am 
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Location: blue mountains, nsw
yep no worries.
think the weber is too big for my motor so going to an su anyway.

thanks for the advice all the same
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subwayseth
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PostPosted: Mon Aug 02, 2010 9:30 am 
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why not try some smaller chokes in it?

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1071
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PostPosted: Mon Aug 02, 2010 8:35 pm 
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848cc
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Joined: Tue Oct 18, 2005 11:32 am
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Location: Canberra ACT
Vac advance will significantly improve your fuel consumption - which is what its there for. If you're happy paying 30% more for fuel each week (the effect it had on my commute) then don't fit one.

Webers can be easily set up to return 30 mpg on an S which is not too shabby.

Cheers, Ian
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