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7.4L Duramax Buildup: The Chevy 454 Returns

As a 1,300hp Duramax diesel

Mike McGlothlin
Dec 1, 2010
Photographers: Mike McGlothlin
The 454ci big-block gasoline V-8 may be one of the most coveted, recognizable powerplants ever cast by General Motors. Its large displacement and big bore gave it the kind of low-rpm power a small-block owner could only dream of. Back in the '70s and '80s, the 454ci (7.4L) GM big-block separated the men from the boys.
Photo 2/17   |   1012dp 7 4l Duramax Buildup assembled 6 6l Duramax Diesel Engine
Today, another engine, also built by the General, is changing the diesel enthusiasts' world: the 6.6L (403ci) Duramax. With common-rail direct-injection, aluminum cylinder heads, six head bolts per cylinder, and turbocharging as standard equipment, it's the powerplant of choice for many hot-rodders, drag racers, and sled pullers alike. And-just like in the days of old-the die-hard Duramax fans are after the same thing: horsepower.
When we heard a rumor that the folks at Fleece Performance Engineering were putting together a 454ci (7.4L) Duramax, we had to see it for ourselves. So we headed to its shop in North Salem, Indiana, to get a look at a one-of-a-kind engine built to be used in a 3.0 Class sled pulling rig. If this is any indication of how Fleece's new, big-block, Duramax engine program will operate, the Cummins camp will definitely have its hands full.

Sources

Banks Power
Azusa, CA 91702
866-738-5915
http://www.bankspower.com
Industrial Injection
Salt Lake City, UT 84104
800-955-0476
www.industrialinjection.com
Mahle Motorsports
Fletcher, NC
888-255-1942
http://www.mahlemotorsports.com
Fleece Performance Engineering
North Salem, IN 46165
855-839-5040
http://www.fleeceperformance.com
SoCal Diesel
Valencia, CA 91355
661-775-5620
www.socaldiesel.com
Carrillo
Mooresville, NC 28117
704-664-2515
http://www.cp-carrillo.com

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