Selection of types of jets for the Solex carburetor 21073. Everything you need to know
As a rule, they select the types of jets for the Solex 21073 carburetor during its adjustment on the engine. Some of the drivers sometimes think that if a dream comes true, and the Solex is finally installed on the car, then all problems will be resolved at once. But it was not there! The main work only begins after installation. Solex, designed to save you money on fuel resources, in order for it to function correctly, it also needs to be fine-tuned.
Well, if there is a familiar carburetor. And if not? You can try to do the adjustment yourself, but for this procedure you need to know at least more information about the carburetor itself.
Selection of types of jets for the Solex carburetor 21073- one of the components of its adjustment for the most reasonable further operation. And before changing one to another, one must fundamentally understand: why, and what kind of detail is this?
Theory
The engine sucks air through the diffuser, and a certain amount of gasoline through the fuel jet. The volume of air and fuel sucked in depends on the volume of the engine. Therefore, the trend is to put a small jet under a larger volume of the engine. And if you have to install a similar Solex 21073 carburetor on a small engine (for example, 1.5), then regular jets are poor (that is, they give an unsaturated mixture).
Therefore, we can say that it all starts with the fuel jet - its selection and settings. After, already in the second head, you need to pick up an air one for it. To start - strictly from the first camera, until you have set it up, it is not recommended to engage in the second one in any case.
Rule: jets are selected according to the volume of the engine. And it’s best to find a factory Solex before starting the setup, corresponding to the volume of the unit on your car, and rearrange (or put the same) jets from it.
Selection basics
If we put, for example, Solex 21041 (volume 1.8) on the engine 1.5. This carburetor with a 24x26 diffuser, fuel - 102.5, and this is not enough for a 1.5 engine. We are looking for coincidence of cameras and diffuser. We find the closest of the options: Solex 21073. It is with a diffuser 24x24 and with TJ - 107.5. And the first cameras are almost the same. By the way, if the diffusers are almost the same, and the engine size is smaller, then the suction of gasoline will be less (the jet is poor). This means that TZh (fuel jets) from 110 are needed. We are recruiting a few.
Next, you need to decide what you want to get: economical slowness or costly throttle response. Depending on the decision, we also select the TJ: to adjust the enrichment or depletion of the mixture of air and fuel (depleted will lead to savings in gasoline, but will affect the dynamics of acceleration of the car).
A few examples of how to choose
1.8 liter engine. Carb - Solex 21073 (24x24). The first chamber goes fuel - 115, air - 165. In the second: TJ - 115, air (VZH) - 125th. idle: 41st. In this scenario, the consumption of AI 92 for urban driving is from 8 to 9 liters.
Engine 1.5 D. carb - Solex 21073. In the first - TJ 115th, VJ - 155 ZD. In the second - TZh 115, VZh 135 ZC. XX - 41st. Gasoline AI 80. Consumption - highway 10, city 12.
Additional Information
But in general, in addition to a selection of jets, there are still a lot of useful and interesting nuances of setting up the Solex, so that it works correctly and is combined with the engine of your carbureted car.
You should always start by setting the levels in the cameras. They are manually installed according to the positions of the floats themselves, depending on the unit cover (everything is done according to special templates). And in vain do you think, like many gullible Solex users, that everything is already on display from the factory. In order not to lead to overflows and stress on the needle, we make the appropriate settings by bending the tongues of the floats.
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