automotive carburetor adjustable main jet, does it exist?
I was wondering.
On a carburetor, the idle circuit is variably adjustable by a needle screw, right? So, it's like a non-fixed jet? Why isn't that done with the main circuit? That how it seems to work on older small engines, with the main adjustment on the bottom of the bowl. I did a search and found this. but, It looks like this for small engine/agriculture equipment. So... why not automotive engines? Why use a fixed jet that has to be changed for adjustment? Or do I have this whole thing wrong and don't know how a carburetor works? |
stupid question or too good of a question?
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what kind of a carb are you talking about what you showed was not on a car maybe on a model T or A
if you have more info that would help |
An automobiles carb will have multiple fuel circuits, each one dealing with a specific rpm or load to keep a consistent fuel mixture over a large rpm range. Small engine will have a much smaller rpm range and predictable single load making a simple carb with two fuel circuits enough to manage the demand.
When you look into auto carbs you'll find how complicated and precisely engineered they are. |
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