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Author Topic: Aprilia Carburation - Weber 36DCR  (Read 253 times)
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peterblenk
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« on: 16 September, 2019, 08:18:15 PM »

Does anyone have advice/experience on fitting the Weber 36DCR carburettor to a Series II Aprilia engine? Specifically, what size main and idle jets and which emulsion tube should be used? Should the accelerator pump be used?  I've got the carburettor nicely fitted, and the linkage set up, but the tune is clearly far out. Peter Blenk
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simonandjuliet
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« Reply #1 on: 17 September, 2019, 04:41:44 AM »

Any chance of a photo ? Be good to see the set up.

I will look through various books and see if I have anything
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S1 Aprilia Cabrio, S2 Aprilia, S1 Promiscuo,S2 camioncino, S2 furgoncino, S3 Appia, R4 Sinpar, R4 Rodeo, R60 Tractor, Moto Guzzi Ercole, Disco 3, Mini ALL4 JCW, Moto Guzzi Cardellino 73,Fulvia Berlina GT, Fulvia Rallye S, Fulvia 1600 HF,
Sebastien
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« Reply #2 on: 17 September, 2019, 06:30:04 AM »

Peter,
In 2017 at the spring Lambda meeting at the Phoenix there was a nice black series II Aprilia (at the back of one picture), and I had a good discussion with the owner.
He had a register twin choke Weber fitted (more modern, the one which fitted Cortina GTs in the seventies). For that he had one of the special twin choke manifolds that Gerald Batt had reproduced. The carburettor had been set up and tuned by the following company:
http://www.aireytuning.com/#home
He was very happy about the set up, starting, running, and fuel consumption, and I could see the car was running well.
Hope this helps.


* Aprilia Twin choke - 1.jpg (348.45 KB, 960x1280 - viewed 9 times.)

* Aprilia Twin choke - 2.jpg (330.47 KB, 960x1280 - viewed 10 times.)

* Aprilia Twin choke - 3.jpg (420.95 KB, 1280x960 - viewed 9 times.)
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peterblenk
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« Reply #3 on: 18 September, 2019, 10:27:08 AM »

Thank you, Simon. I am in London, so probably won't make it to Phoenix soon, but I will contact Airey.
Peter
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Andrew White
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« Reply #4 on: 21 October, 2019, 07:59:07 PM »

Hi Peter, I have recently put an Aprilia back on the road which last ran in 1961 and is fitted with a 36 WEBER.It doesn’t run very cleanly yet but I had to solder the float and in doing so altered the float level.I am hoping this explains the poor running! I am about to check it with an air /fuel ratio gauge to see what is happening .If it helps the 3 jets which unscrew vertically are numbered 45,115,60. That is 45 nearest the wing,60 nearest the engine.It has an accelerator pump fitted.Does anyone know what the correct fuel level is? Presumably different density of modern fuel will alter this.The engine is much happier running with a lot more ignition advance than standard. Hope some of this helps !Cheers Andrew White.
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