Dalite,
I can't tell you if it is a Bleed hole or not. My controller don't have that hole, it is an older version.
Here is a quick test: connect a tube to the side port of the controller and blow into it. if air comes out of it it is indeed a bleed hole. My initial tests with this controller were bad because the absense of the bleed valve made the wastegate stay open after first boost. If you have a bleed hole in you controller, you would be able to make a better connection than the one I oroginaly posted.
Connect the bottom part of the boost controller directly to the turbo presure line ( remove the cream colored line on the right side of the turbo intake and connect the controller to this port on the turbo). connect the side exaust port of the controller on the waste gate fitting (the one were the orange line is conected). This setup will give you better response and lower boost spikes if you connect it as close as possible to the wastegate. but remember, this would only work if you have a bleed hole in order to get the presure out of the waste gate after the controller has closed.
Your question about vacume lines, Don't use the boost gauge line to connect the boost controlleror any of the rigid vacum lines sold in Pep Boys. If you have a smaller diameter line conected to the controller you will have larger and longer boost spikes!
Try to get the biggest line you can get.
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