IIt’s no secret that Ford has dubbed the Goldzilla with its 7.3-liter pushrod V8. Built primarily for use in F250 trucks, the Godzilla is also proving popular as a boost-ready crate motor for the aftermarket.
GM has a similar offering, though it doesn’t have as many cubes or such a catchy name. Nevertheless, the 6.6-liter L8T is going to be an important part of GM’s arsenal in the aftermarket.
The iron-block L8T in stock form makes 401hp at 5200rpm and 464lb-ft at 4000rpm. Like the rest of the Gen V or LT family, the L8T runs direct injection.
The compression ratio is 10.8:1, a touch down on the L8T’s smaller cousins. Other key specs include aluminum heads, forged cranks, forged powder metal rods and hypereutectic pistons.
The aftermarket is already on the case, as Harrop’s crew found out when they visited Mast Motorsports in Nacogdoches, Texas.
Mast is currently testing one of their L8T crate motors with a 1046hp Harrop port fuel injection option strapped atop a TVS2650 blower.
With a 102mm throttle body and running on E85 fuel, the blown L8T engine makes 1046hp and 958ft/lb on the dyno.
As GM pulls back production of LS-based motors, expect the L8T and other Gen V-based mills to move down the line.