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  • Inside Gale Banks Engineering’s New Blown 7.1L Duramax

Inside Gale Banks Engineering’s New Blown 7.1L Duramax

Megamax

David KennedyJan 1, 2012
Deep within the prototype building of Gale Banks Engineering lies an assembly room where some of the most powerful twin-turbo Duramax engines ever built were born. While most of us are familiar with Banks’ diesel performance parts, very few people have seen inside the Banks research and development facility. It’s an R&D department that comes with an extra R—and that R stands for racing. In simple terms, no one else in the diesel industry has anything like it.
Photo 2/16
Yet on our recent trip to the Banks R&D&R department in Azusa, California, we weren’t there to see turbochargers—we were there to see a supercharged 7.1L Duramax. Behold, this 433ci Duramax, we’ve dubbed Megamax, features an ’11 LML engine block (the strongest D-Max block ever built), a billet-steel stroker crank, H-beam Carrillo connecting rods, and forged-aluminum Mahle pistons. Rounding out the long-block are a set of production LML-based cylinder heads that have been CNC-ported and blended to match a one-off aluminum intake manifold bolted between the heads. Fueling the Megamax is a pair of beltdriven CP3 injection pumps and two progressive stages of nitrous and water-methanol.
Photo 3/16   |   Within Banks’ engine assembly clean room, the 7.1L Duramax engine build began by hanging the Mahle forged-aluminum pistons on billet-steel Carrillo connecting rods. Each tool-steel floating pin was lubed and slid into its respective piston and rod.
The Loudest Duramax On Earth
This engine is destined to speed the Banks dragster down the quarter-mile in 2012, and when it does, you’ll be able to hear its 2½-inch zoomie headers from a mile away. ’Cause without any turbos to restrict the exhaust flow, this supercharged Duramax will be the loudest common-rail diesel you’ve ever heard! We can’t wait to see it run.
Photo 4/16   |   The dry-sump oil system is made up of two pressure pumps and five scavenging pumps that literally vacuum the lubricating oil out of the engine. This system practically eliminates power loss from oil sloshing around in the engine and slowing moving parts. Drawing a vacuum in the crankcase also allows the engine to run reduced- friction piston rings—freeing up power and reducing engine wear.

Sources

Gale Banks Engineering
Azusa, CA 91702
800-398-9256
www.bankspower.com

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