GM’s most recent offering in the LT Gen V iron block lineup is what horsepower dreams are made of. Known as the L8T, you can find the motor in the 2020 and newer Chevrolet and GMC HD trucks. The newly designed block is thick in all the right places coming in at 6.6-liters, which lends itself to being the perfect factory platform to build on. The team at Scoggin-Dickey Parts Center (SDPC) Raceshop saw this potential and wanted to see what they could do if they put their touches on an L8T build, with the goal being 2,000 horsepower safely.
Inside Scoggin-Dickey’s L8T
The SDPC Raceshop crew began the project by sourcing a new L8T block and crank. To prepare their new block for the power numbers they had in mind, the team installed billet steel main caps and a set of ARP studs. In addition, as part of their Race Prep package, the block is drilled to accept both LT and LS style cylinder heads. For this build, SDPC bolted on a set of their CNC ported LT4 heads that utilize the factory rocker arms. They also added their CHE Trunnion upgrade along with upgraded valve springs and pushrods. Internally, a set of Callies Ultra rods and Wiseco forged pistons with Total Seal piston rings round out the rotating assembly. The factory crankshaft is a forged piece, more than capable of handling the power level the team was attempting to achieve.
While Scoggin-Dickey was pretty open with this build, they didn’t disclose the specs of the camshaft, although it does allow the engine to spin to a 7,500 rpm redline easily. A Holley Hi-Ram intake manifold coupled with Holley’s 102 mm throttle body was pulled from the SDPC shelves and put into action for the top end of this build. To finish off the core of this beast, the Raceshop used more parts from the SDPC catalog. A balancer from ATI Performance Products, Moroso oil pan, Peterson Fluid Systems external oil pump, and Hooker Blackheart exhaust manifolds…
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