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  • Big Power In A Small Package - Turn Key Gen III 5.3L LS

Big Power In A Small Package - Turn Key Gen III 5.3L LS

Turn Key Engine Supply designs a 400HP Gen III 5.3L LS

Harley Camilleri
Apr 1, 2012
Photographers: Truckin' Staff
With the constant onslaught of simple and reliable EFI horsepower available today, it's easy to forget that not all of us want or need huge power in a large package. Many truck projects on the road could benefit greatly from a more basic approach with a smaller cubic-inch assembly that would be a little lighter on the wallet. At the forefront of the Gen III and Gen IV LS engine rush is Turn Key Engine Supply located in Oceanside, California. For those wanting a smaller inch engine that still packs a decent punch, Turn Key has three engines just for you. With a range of 327ci 5.3L engines putting out 350, 400, and even 450 hp, we wanted to know more about these powerful and reliable engines.
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Turn Key proprietor, Kolby Enger, has built a 14,000-square-foot empire of LS technology that can turn out an engine for a swap, sand car, rock crawler, race car, and everything in between. Turn Key's premise is to build its engines with top quality parts that will last, and give the customer nearly everything necessary for a successful installation and upgrade to GM's phenomenal LS power. According to Kolby, customers will only need to connect five wires, fuel, and cooling to be on their way to horsepower nirvana. With that kind of information in hand, we stopped by the company's headquarters for a closer look at what magic lies beneath a 400hp 5.3L.
turn Key Engine Supply Ls7 heads
  |   19. The 706 casting number heads are fit with 1.575-inch exhaust and 2.02-inch intake valves. With GM beehive springs, cathedral ports, and 62cc combustion chambers, they will allow the 327ci engine to easily garner 400 hp. With a little cleanup work, these same heads get used in the 450 hp engine, too.
turn Key Engine Supply Ls7 dyno Chart
  |   38. And the truth is in the graph. With the correct choice of parts and nothing custom or exotic, the Turn Key 327ci 5.3L churned out 404.4 hp at 5,676 rpm with 404 lb-ft of torque at 4,699 rpm. Now that is an awesome engine that could be used under the hood of your truck project!
Not only does Turn Key build the engines, it also offers fuel pumps, engine mounts, headers, harnesses, ECMs, and darn near anything else necessary to make your conversion to LS power go smoothly.
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Turn Key Powertrain
Oceanside, CA 92056



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