minitici
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| posted on 31/8/11 at 02:41 PM |
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28-36 Weber Manifold
Trying to sort my mates Jeffrey JS5 which has a pre-crossflow 1500 running a Weber 28/36 downdraft.
The inlet has a hole in the base which goes to atmosphere.
The hole looks intentional as it has a brass seat.
What is it for and should it be open to atmosphere?
 
28 36 manifold
PS - Anyone got a pre-crossflow manifold and twin 40's?
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JeffHs
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| posted on 31/8/11 at 02:56 PM |
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I believe it used to be common practice. It's a drain in case of flooding. My 2CV has one and I'm sure I remember them on some of the
bangers in the dim and distant
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MikeRJ
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| posted on 31/8/11 at 03:36 PM |
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Is there a barbed fitting on the bottom of the manifold for a rubber hose? If not, did there used to be one and it's been snapped off at some
point?
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minitici
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| posted on 31/8/11 at 06:04 PM |
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Don't know if there was any fitting on the bottom but unlikely as the hole is very close to the exhaust manifold (It's a pre-crossflow
therefore exhaust is on same side as carb).
I'll need to take the manifold off and have a closer look.
[Edited on 31/8/11 by minitici]
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rusty nuts
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| posted on 31/8/11 at 06:44 PM |
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Have vague memories of a copper pipe vented to the atmosphere on some pre crossflow engine . Long time since I worked on one though
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