Mar 3, 2003 #1 T TURBOZ New Member Joined May 25, 2001 Messages 128 Last year I ran a single GT76. This year im going twin GT40's. On the street with 12psi I ran 30* of timing. With bigger turbos is it generally required to reduce timing as airflow increases at the same boost level?
Last year I ran a single GT76. This year im going twin GT40's. On the street with 12psi I ran 30* of timing. With bigger turbos is it generally required to reduce timing as airflow increases at the same boost level?