Re: external wastegat question
 

top port is only for electronic and fancy schmancy boost controllers

Stand manual controller only uses the bottom port, can leave the top port open I think dont think you have to cap it

Re: external wastegat question
 

capping it is not the correct thing to do

Re: external wastegat question
 

If your just gonna rock a manual boost controller or none at all, leave the top port open to atmosphere.
If you use a bling-blang electronic boost controller, then yeah, it will use either the top port or both ports. (depends on the controller)

Re: external wastegat question
 

just put in the vacuum line on the top fitting and have fun. you will gain more hp :1