Simplify the following text for a Grade 4 native English-speaking person.
Original: Cosworth experimented with turbocharged BD derivatives , before settling on an all-new turbocharged 1500 c V6 engine to be badged as the Ford TEC ( internally it was known as the GB-series ) .
Simplified: They finally built an all-new turbocharged 1.5 L V6 engine . This engine was badged ( named ) the Ford TEC .