wastegate hole size?

[workingdan]

I just got my new turbo and have to enlarge the wastegate hole. What size should the hole be? I put grease on the puck and made a mark on the housing to see were to put it.I just dont want to go to big.I have a turbonetics 6131bb and a terry huston dp. any help would be great thanks.

 

[Chuck Leeper]

I'd stay 3/32-1/8th inside the OD of the mark.