Table schema:
CREATE TABLE table_name_84 (constructor VARCHAR, q1_pos VARCHAR, q1_time VARCHAR)

Question: Who was the constructor of the car that had a Q1 pos of less than 8 and a Q1 time of 1:15.038?
SQL: SELECT constructor FROM table_name_84 WHERE q1_pos < 8 AND q1_time = "1:15.038"