The
Vortec 8100 (RPO
L18) is a
V8 truck engine. It is a redesigned
Chevrolet Big-Block engine and was introduced with the 2001
full-size pickup trucks. It is an all-iron engine (block and heads) with two valves per cylinder. It retains the same bore centers as the old 7.4 L big-blocks, but stroke was upped by 9.4 mm (0.4 in) to reach 8.1L (496cuin) for a total of 107.95 mm (4.3 in) bore and 111 mm (4.4 in) stroke. Power output ranges from 325 hp (242 kW) to 550 hp (410 kW) and torque from 455 lb·ft (617 N·m) to 690 lb·ft (936 N·m). Vortec 8100s were built in
Tonawanda, New York. The Vortec 8100 is the engine used in the largest Uhaul, their 26-foot (7.9 m) truck. GM stopped installing big block V-8's in the Silverado HD trucks, when the GMT-800 series was discontinued in 2007. 8100 marine engines range from 400 to 600 hp (447 kW) and come with a stand-alone Engine Control Module (ECM). The last L18 was manufactured in December
2009.
The 8.1 that Winnebago uses is the L-18 and it produces 340 hp and
455lb ft @ 3200 rpm (L18)
Linear Mode
