Niagara projectile spawn time

I am trying to do a Bullet Hell game using Niagara for projectiles, but i have a problem. I need that projectiles spawning instantaneously when the input key “shoot” is pressed. I am using a Fountain emitter template, the particles start to spawn at 0.07 seconds, too late for me. If i use the Module “Spawn Burst Instantaneous”, the particles can spawn at 0.03 seconds, still too late, i need it in 0.01 seconds, but i do not know how. Can you help me please?