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Atomiser -DELLORTO (type: 5353) SI- (BE5)

2560005
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€7.79 *

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Carburettor jets
used with carburettors brands: Dellorto
used as atomiser in: Dellorto SI
diameter head: 6 mm
total length: 26 mm
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Available versions

Part no.: Atomiser size Price Stock Cart Save
Part no.: 2560001 Atomiser size BE1 Price
€7.79
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Part no.: 2560002 Atomiser size BE2 Price
€7.79
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Part no.: 2560003 Atomiser size BE3 Price
€7.79
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In stock: can be delivered or picked up in the store
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Part no.: 2560004 Atomiser size BE4 Price
€7.79
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Part no.: 2560005 Atomiser size BE5 Price
€7.79
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Part no.: 2560006 Atomiser size BE6 Price
€7.79
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The mixing tube (sometimes also called atomizer) of the SI carburetors has a great influence on...Continue reading

Description


The mixing tube (sometimes also called atomizer) of the SI carburetors has a great influence on the quality of the premix. The available range extends from BE1-BE6. However, the name of the mixing tube cannot be used to generalise which type is richer or leaner. The mixing tubes deliver, depending on speed and load, different flow rates.


function nozzle block SI

In the nozzle block area of the SI carburettor there is always a defined level of fuel (depending on the filling level in the float chamber). I.e. below the atomizer tube (which opens into the intake area of the carburetor) there is a petrol column. For this reason we also advise against the so-called float chamber spacers. These increase the filling level in the carburettor, but they also provide a higher level in the nozzle block area, which means that the premix can no longer work properly and possibly also petrol runs directly from the atomiser into the engine (spillage). The real problem is also not a too small volume of the float chamber, but a tuning via the air nozzle.

From the very bottom, the following fuel quantity is defined by the main nozzle. In the middle is half in the fuel, half in the air, the so-called mixing tube (e.g. BE3). From the top, the air nozzle defines the amount of incoming air.


MIXTING TUBE
The pre-foaming process in the mixing tube is very complex and strongly dependent on pressure and speed. The mixing tube has various cross holes. These are partly in the gasoline level, partly outside of it in the air area. Depending on size, quantity and positioning of the bore, this results in different pre-foaming behaviour.


It should be noted that there is generally no per se greasing or emaciating mixing tube.
As a rough guide value, a characteristic curve in relation to the speed of rotation can be shown.


BE4 - BE6 - BE5 - BE1 - BE3 - BE2


In this list, from left to right, the mixing tube is rather greasing at low speed and emaciating at high speed. The whole thing then tilts accordingly and becomes lean at low speed and greasy at high speed.


Attention: The mixing tubes have an effect over a very wide speed range. For example, a BE4 mixing tube greases strongly just above the idling slide valve position. A BE2, on the other hand, is relatively lean in the lower speed range, but greases strongly at the top.


The most common mixing tube BE3 covers 90% of all applications of the SI carburettor. In addition, the used gas slide should be checked here (see slide SI).


TIP

The combination air nozzle 160 with mixing tube BE3 is sufficient in almost all cases. If the filter bottom is drilled and/or a resonance exhaust is installed, the mixing tube can be changed to BE2 and the air nozzle to 140 if necessary.


(US)



BE5
AI-translation

 

Fits the following vehicles


Alternative items


Atomiser -DELLORTO (type: 5353) SI- (BE1)
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2560001
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2 further versions from €7.79
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2 further versions from €7.79
  • In stock: can be delivered or picked up in the store
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variants Dellorto
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2 further versions from €7.79
  • In stock: can be delivered or picked up in the store
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  • In stock: can be delivered or picked up in the store
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  • In stock: can be delivered or picked up in the store
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  • In stock: can be delivered or picked up in the store
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Atomiser -DELLORTO (type: 5353) SI- (BE4)
variants Dellorto
2560004
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Atomiser -DELLORTO (type: 5353) SI- (BE4)
2 further versions from €7.79
  • In stock: can be delivered or picked up in the store
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  • In stock: can be delivered or picked up in the store
    BE2
  • In stock: can be delivered or picked up in the store
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Atomiser -DELLORTO (type: 5353) SI- (BE6)
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2560006
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2 further versions from €7.79
  • In stock: can be delivered or picked up in the store
    BE1
  • In stock: can be delivered or picked up in the store
    BE2
  • In stock: can be delivered or picked up in the store
    BE3
  • In stock: can be delivered or picked up in the store
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