I believe its call the compressor side but Im unsure. I see it in different places, rotation wise for different intercooler setups and I was wondering how to turn it on a t78.

Thanks

 

There should be 6 (or so) nuts to loosen on the back of the compressor housing, once you loosen them you can rotate the compressor housing.

 

^ What he said. Also you want to be carefull when turning it. Make sure that it turns freely. If you have to use a rubber mallet or some other persuader be extremely carefull. You can **** the housing and bend the fins of the front wheel. How do i know? Don't friggin ask