Wayne67vert
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I've ordered a Weber conversion for my Series 5 Alpine. Are there any tips or tricks I need to know?
Thanks,
Wayne
Thanks,
Wayne
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Enjoy.
Very sensitive to fuel pressureI've ordered a Weber conversion for my Series 5 Alpine. Are there any tips or tricks I need to know?
Thanks,
Wayne
If the Weber is being installed on a series 5 the bracket for the Stromberg linkage can't be used. As mentioned earlier you need the series 3 or 4 firewall bracket. I had a local shop make a few of the fire wall brackets and the rod going to the carb. I had them make some changes to the 90 degree bend of the rod by making it longer so I can drill the end of the rod going to the carb for a cotter pin to secure the rod in the carb bracket. You can see this in my photo of the blue car.I have a 32/36 on my SV currently that uses the stock block mounted fuel pump, in fact I've
put Webers on a few other Alpines using the stock pump with no issues. Cars run great!
You will have to modify the throttle linkage. You can buy the rod from either SS or CS, but
you'll have to source a Series IV firewall bracket to make it all work. It's best if you can find
the whole SIV bracket & linkage.
Good luck!
Cheers!
Steve
I'll take a photo of the series 5 bracket and one of my reproduction series 4 brackets. The series 4 is stored in our garage about thirty miles from the house so I can't take a better photo of an original installed on the car but the series 5 is here at the house so I'll take a photo of the bracket installed.You can barley see the bracket ( behind the brake master) in the picture of Bobs blue Series V. You can see the rod clearly
and see how straight it goes to the carb bracket. The stock Series V bracket doesn't put the rod in the correct location,
it sits too high. You want to make sure that you have a smooth operation with this or it will bind and stick the carb
either open or closed. It'll be hard to drive that way.
The Webers I've installed work pretty well right out of the box.
Cheers!
Steve
Wayne,
More important than the Weber carb is the inlet manifold. In my personal opinion after 37 years of Alpine ownership and multiple Alpines, fitting the twin choke Weber to the standard manifold will give you a good improvement over ANY other carb set up on an Alpine BUT the standard manifold tends to run rich on No 1 and No 4. Sometimes it is physically running with fuel on 1 & 4 and petrol drips out of the manifold drain pipe because of this. Fitting the Curved manifold as designed by the UK owners club with the forced induction system will prevent this problem and really release the power. You set the car up once and it just stays in tune, year after year with zero maintenance required. After Strombergs losing synchronisation or breaking their diaphragms, Twin Webers being a pain until the car is in the mid-range and Zeniths moving out of tune the twin choke Weber is a revelation.
Standard mechanical fuel pump is fine, no need to change it.
I would recommend making a new rod bracket with a phosphor bronze bush as shown in the video on The Sunbeam Alpine Channel on YouTube.
If you fit the new manifold do not connect the PCV valve to the threaded hole on No 4 or you will cause problems. Fit a blanking plug to that hole.
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