Anyone using Weber's with Alpina (repro) plenum?

Markos

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Hi guys, I have the original alpina b2 airbox and Solex carburettors.
One thing I don’t see in this thread are the rubber gaskets that mount between the airbox and intake runners which from memory are a couple mm thick.
I will try to snap some pics tonight, but I guess they would give the clearance you need. I am sure that can be easily replicated.
Please do! Easy enough to make. I’ll be sure to complicate the process however by adding technology to the equation.
 

JamesE30

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Thanks, looks like about 3mm, I ordered some material that is about 2mm, maybe I should get thicker
did you buy or make these?
Mark
I did not buy or make them, as far a I can tell they are original.
I don't know how close the airbox is to the hood but I can imagine doubling up the 2mm to make 4mm wouldn't be an issue if you still needed a little clearance..
 

mark99

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thanks,
it is good they have lasted so long
I think after all the carps and horns are bolted up I can put a straight edge along them and see how in plane they are
 

Markos

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Hi @James,

Do you have access to a scanner? If so, would you be willing to draw a trace of the gasket and scan it? If it is a chore don’t sweat it. I can do the same with the manifold, it is just a little awkward. I also need one dimension, like the width of the gasket in mm.mm. Again, not a big deal if it take you more than 8 hours (ok 15 minutes). :D
 

mark99

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Hi @James,

Do you have access to a scanner? If so, would you be willing to draw a trace of the gasket and scan it? If it is a chore don’t sweat it. I can do the same with the manifold, it is just a little awkward. I also need one dimension, like the width of the gasket in mm.mm. Again, not a big deal if it take you more than 8 hours (ok 15 minutes). :D
Hey Mark, I plan on tracing the 'air horn'
 

Markos

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FYI - Now that @mark99 and I resolved the gasket issue, and thermostat relocation I am moving onto the plenum nuts. If you look at a restored car the nut usage on the plenum is all over the board. I see a number of cars with hexagonal nuts that look visually similar to the well-known Alpina lug nuts.

It turns out that BMW used similar chrome nuts on the Z4 and Z8, along with some other models. They aren’t cheap, but they are M6x1.0, and they are available:

I’m using ECS for reference pics. They are about $12 at the dealer:
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Reference Pics:
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Full Articles just because:
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Key Users: @mark99 , @daddywad
 
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Stevehose

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Compared to the cost of the carbs and filter box stuff, the cool hex nuts are chump change. Note the black painted valve cover with no "Alpina" on it. When my time machine is ready I know the first destinaton I am setting it to!
 

Markos

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Compared to the cost of the carbs and filter box stuff, the cool hex nuts are chump change. Note the black painted valve cover with no "Alpina" on it. When my time machine is ready I know the first destinaton I am setting it to!
I’m thinking that there are at least three iterations on the intake manifold, and Mark’s version matches the final. Either that or iteration 3 is actually just Mark’s manifold.

There is the early one with no raised letters.
The second one with some odd casting marks (raised rectangles) near the edge.
The last crips one, also has a nicer breather tube fitting.

I have picture of all of them but that isn’t what his is about. :D
 

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