On a blown injected gas motor,alky is different, some surge is normal. I've only done 1 blown injected gas set-up. The injection pump,unless it's overdriven, spins at 1/2 motor soeed. Even running the idle check valve at a higher presure only helps so much.The barrel valve has to be on the rich side for any type of snappy response. There is no accelerator pump!. In the vid you can see him blip the throttle. It's snappy. Good to go. Alway go rich in the tune up. Then back it down. Hope that helps.
Blower with carbs....no clue.