Progress continues on Callaway's supercharger packages for the 2014 Chevrolet Silverado and GMC Sierra 1500. First announced last month by the Connecticut-based performance firm, the company has now released photos of the supercharger installed on the new 5.3-liter L83 EcoTec3 V-8.
Despite carryover displacements from last year's Vortec V-8 engines, the EcoTec3 engines are all-new, and the direct-injection system required a completely new fuel-management strategy. But once Callaway engineers got comfortable with the new engine management, they realized the vastly more powerful software could be a powerful performance-enabling tool.
Since the EcoTec3 engines are closely related to the C7 Chevrolet Corvette's LT1, much of the research that went into the truck engines is transferrable to the iconic sports car, although underhood packaging remains an obvious difference.
Callaway has not yet released official output figures for the new supercharger systems, but last month's release targeted output of 450 hp for the 5.3-liter system and 540 hp for the 6.2-liter. One figure the company did disclose was the package price for the supercharger systems, a not-insubstantial $17,395. Is a 100-hp gain worth the price of a decently equipped Chevy Sonic? It's a subjective call. But we sure wouldn't mind getting behind the wheel of a 500-horse supercharged Silverado.
Although the underhood packaging and plumbing of the photos provided by Callaway look pretty clean to us, Mike Vendetto, Callaway's commercial manager, said the photos were still of the development mule, and weren't necessarily indicative of the fit and finish of the final product. The production-trim package will include carbon fiber injector covers, and cleaner-looking bracketry and hardware.