Stop in for a cup of coffee

71GSSDemon said

So, my 660s on the tunnel ram. If I slowly open the throttle, the accelerator shot continues through the whole working if the throttle range. If I crack it open very quickly, like starting line launch, it sprays the whole range and then continues until the shot is done. During to my bog off the line, I think I need a larger nozzle to gel more fuel sooner. Yes???? @Mattax

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If there's no hesitation when slowly opening then, I think the larger nozzles are worth a shot.

I'm going with Shrinker's explanation here, which I'm not sure I fully understand, but think I do.
Paraphrasing, he said that the pump shot is needed to rewet the intake manifold which evaporate with the change in pressure. Something like dew forming on surface but in reverse.

Once the throttle are modeately open, shouldn't need pump shot. The venturi's will keep fuel flowing matching airflow. The challenge is the low speed circuit which is dependent on manifold pressure.