70mm Spoon Venturi Throttle Body

[Turfy]

Hey guys,

Can anyone tell me what these two circular opening are in this spoon 70mm throttle body?
I'm unsure as to why they are there and what they do?

Thanks

 

[Puggie]

low speed idle (little holes) IACV feed (big holes).

 

[IntermaN]

Check out this video:

 

[Turfy]

Thanks guys!