GM engineers began with the Vortec 7400 and kept the same 4.25-inch bore, but stroked the engine from 4 to 4.37 inches, ...

When it comes to very high displacement engines, some of the biggest are the GM 8.1L Vortec V8 and the Dodge 8.0L Magnum V10. We matched them up head-to-head.

GM set out to make the Vortec 8100 a tough and resilient engine for folks looking to tow. It's based on the old-school Gen-VII Big Block and effectively is a 454 with a longer (4.37-inch) stroke.

General Motors' LS and Vortec V8 engines are very similar, to the point that some people consider them one and the same. There are slight differences, though.

The cheap and poorly thought-out engineering of the Avalanche's 8.1-liter 330 horsepower Vortec 8100 engine is all too apparent when the entire dashboard has to come apart to fix a simple heater core.

In fact, he's already swapped big block Vortec motors into classic C4 and C5 Vettes. But those were like Matchbox toys compared to the mid-engine, European-adjacent Corvette C8.

Vortec 8100 Engine Rebuild Details. See All 21 Photos. The Avalanche block's seasoned bores are enlarged 0.030 inch to 4.280 to eliminate existing wear.

Read a comprehensive look at the new LS2 small-block Chevy engine. Brought to you by GM High-Tech Performance ... that each have more than 400,000 miles on their original Vortec engines. ...

Chevrolet Vortec 7400 L29 Gen VI Available: 1996-2000 Also known as the L29, GMC's 7400 (corporate-speak for 7.4-liter) motor represented the Vortec-ization of its classic big block architecture.

The Workhorse gas chassis features the improved 6.0-liter GM Vortec gasoline engine, ... The 6.0-liter V-8 gasoline engine uses variable valve timing and an Allison 5-speed 1000HS transmission.

For 2001, the Chevrolet Silverado 3500 came with a standard 300-horsepower 6.0-liter Vortec V-8 engine mated with either a manual or an automatic transmission. Optional powerplants for the one-ton ...

Chevy's Vortec 8100 — AKA the L18, AKA the Vortec 8.1 — was the last of The General's big block V8s, a line of engines that traced its lineage clear back to the fire-breathing muscle cars of ...