1984 Chevy Camaro - Power Struggle
Murphy also pays attention to transition areas when building a computer-controlled Q-jet. Since off-idle engine vacuum drops harder with our cam in place, he enlarged the accelerator-pump discharge orifice from 0.026 to 0.031 inch. Compensating here instead of via a jetting change has less of an effect on emissions. It also lessens tip-in hesitation, according to Murphy, which gives the car better throttle response.
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