Your concern as you have presented is not valid, as solely this engine capacity change is not so great as to be beyond the capability of this carburetor to compensate.
The real issue affecting the fuel delivery would be "signal", or the perceived pressure differential presented at the metering restrictions within the carburetor. The first assumption that if the capacity of the engine increases so will the requirement for proper fuel delivery seems appropriate, but by the same token since the throttle restriction remains constant then the "signal" or drafting of fuel will also increase.
The difficulty is when one changes other components, such as the camshaft to something more aggressive, then even though the engines' capacity may have increased, the signal is perhaps reduced to the carburetor, and ones' belief is that a larger jetting value is required because of the perceived increased air flow, but actually the larger jet is required because of the reduced signal, particularly at low speed.
But note that tuning efforts, which are unique to each instance, are generally required if one wishes to reap the best possible performance, as is responsible by the carburetor.
Scott.
The real issue affecting the fuel delivery would be "signal", or the perceived pressure differential presented at the metering restrictions within the carburetor. The first assumption that if the capacity of the engine increases so will the requirement for proper fuel delivery seems appropriate, but by the same token since the throttle restriction remains constant then the "signal" or drafting of fuel will also increase.
The difficulty is when one changes other components, such as the camshaft to something more aggressive, then even though the engines' capacity may have increased, the signal is perhaps reduced to the carburetor, and ones' belief is that a larger jetting value is required because of the perceived increased air flow, but actually the larger jet is required because of the reduced signal, particularly at low speed.
But note that tuning efforts, which are unique to each instance, are generally required if one wishes to reap the best possible performance, as is responsible by the carburetor.
Scott.
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