Holley accelerator pump cam kit [HO20-12]

Holley accelerator pump cam kit [HO20-12]

These Holley accelerator pump cams will allow you to tune your accelerator pump performance. The kit includes 8 cams that have a different shape or profile. Cam "lift" directly affects the accelerator pump stroke, and, therefore, pump capacity. Ramp profile or shape controls the "timing" of the shot. A steeply-rising ramp shape will give a fast, heavy fuel shot right off idle. Conversely, a gently sloping ramp will spread the pump action over a longer period of time.

Application: Holley 4150, 4160, 2300 Series Carbs

Accelerator pump shot relative to cam colour from lightest to heaviest are as follows: Black, Pink, White, Red, Green, Orange, Blue, Brown, Yellow