Glossary “top mount battery” Definition:
Battery having terminals located at the top of the case.

Glossary “top ring” Definition:
Top ring of a piston.

Glossary “top time (TT)” Definition:
The speed at which a vehicle passes through the traps at the end of a quarter mile.

Glossary “top U-bolt plate” Definition:
Plate located on the top of the spring and held in place when the U-bolts are tightened, clamping the spring and axle together.

Glossary “top end power” Definition:
Engine output at high speed.

Glossary “top fuel” Definition:
The hottest category in drag racing having cars capable of a quarter mile in less than five seconds, and a top speed of over 300 mph (482.7 km/h).

Glossary “top gear switch” Definition:
Lock-out mechanism which prevents the shift indicator light from illuminating when the vehicle is in top gear.

Glossary “top inch” Definition:
The first downward inch of a piston stroke where most wear occurs.

Glossary “top loader” Definition:
A Ford four-speed transmission of the mid 1960s to early 1970s.

Glossary “top end” Definition:
1). High engine rpm; a point that horsepower is the greatest. 2). The far end of a quarter-mile drag strip. 3). Upper portion of an engine.

Glossary “top dead center (TDC)” Definition:
The piston position at the top of its stroke.

Glossary “top eliminator (TE)” Definition:
the overall winner in a series of drag races.