Historical clue formulations

• Booster for a dragster — 2025-08-14
• Extra-powerful, as an engine — 2025-07-16
• Engine supercharger — 2024-02-13
• Lead-in to boost — 2022-01-29
• High-performance engine — 2019-01-07
• Certain jet engine — 2016-08-01
• Raiser of horses? — 2016-06-10
• Jets or chargers starter — 2015-01-18
• Engine booster — 2014-05-25
• High-performance engine — 2014-04-22
• Lead-in to fan or jet — 2013-11-06
• Extra-powerful engine — 2013-08-27
• Engine type — 2012-06-05
• Engine type — 2011-07-21
• Powerful engine — 2009-07-05
• Extrapowerful — 2005-09-03
• Supercharged engine — 2004-12-13
• Jet enhancer — 2004-11-07
• Supercharger — 2004-06-04
• Feature of some muscle cars — 2003-09-26
• Sports car engine — 2002-08-12
• Engine booster — 2002-01-27
• Kind of engine — 2001-12-07
• Lockheed P-38 feature — 2000-08-12
• Powerful engine — 2000-01-12
• Certain engine — 1997-12-12
• Supercharger — 1997-10-05