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Inside Gale Banks Engineering’s New Blown 7.1L Duramax

Megamax

Text By , Photography by , Gale Banks Engineering

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.

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.

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.

SOURCES
Gale Banks Engineering
546 Duggan Avenue
Azusa
CA  91702
800-398-9256
www.bankspower.com
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