non intercooler

My Z is a stock 1982 Turbo. Here in Phoenix during the very hot summers can I use regular unleaded gas with out an intercooler? Also has anyone installed or used a J&S Electronics "SafeGuard" engine knock controller? I just bought my Z this winter. I love these cars, and would be thankful for any help or information. I can be e-mailed at gupagup@hotmail.com