Pump Cam curve Question

[jmarkaudio]

Pink is slowest opening, but I find with most it's too slow. Both pink and blue will max out a 30cc pump.

[CDN]

[Right hand drive]

The blue can often solve hesitation problems on the primaries but just be aware when using progressive linkage (which is 99% of us) the blue is all but done when the secondaries begin to open. If you find you are cruising part throttle primaries and mash the pedal and get hesitation with fast secondary opening you may need to change pump tuning strategy so there is still some pump shot left to cover the remainder of the primary exposure.

[57 210]

[CDN]

Thanks for all the good info Im currently Blue/ Blue will try pink on Primary and evaluate

[hipockets72]

I would use the pink. On a vacuum secondary carb, I find the green usually works better in solving a lean sag when quickly snapping the throttle open a smaller amount.