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LSX Engine Build - To The Extreme

A 400-Inch Turbo Lsx Build That Can Wax 8-Second Chumps Like A Candle
By Tom Kempf, Scott Parker
Photography by Wide Open Throttle Media / Brad Shantry, Rick Jensen, Tom Kempf
Lsx Engine Lsx Stand
Lsx Boltholes
According to engine builder... 
   
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Lsx Boltholes
According to engine builder Billy Briggs, the expert hand behind Wheel to Wheel's many 1,000+ horsepower gen III builds, machining and prepping the LSX block wasn't much different from the many LQ9, LS2, LS1 or C5-rs he has done in the past, aside from the extra head bolts. The larger head boltholes were converted to a 1/2-inch, and the smaller ones 3/8-inch for added clamping...
Lsx Lifter Bore
...the lifter bore was increased... 
   
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Lsx Lifter Bore
...the lifter bore was increased to 9/32- inch for the larger solid lifters and bronze bushings, and the block was grooved to work in concert with SCe copper head gaskets and o-ringed heads. The block was also filled within an inch from the top to handle over 2,000 hp, and some of the oil passages were blocked off for the 5-stage dry sump oiling system.
Lsx Forged Pistons
For this all-out forced induction... 
   
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Lsx Forged Pistons
For this all-out forced induction build diamond forged pistons were the weapon of choice to fill the 4.125-inch bore and help enable a turbofriendly 8.11:1 compression. a combination of Trend Performance h-13 wrist pins and diamond locks secure the pistons to dyers 300M steel 6.125-inch rods.
Lsx Crank
The intended crankshaft\ is... 
   
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Lsx Crank
The intended crankshaft\ is an equally impressive forging from Callies. The highly machined Magnum XL is a leftover from the previous build, and provides a 3.750-inch stroke-though Billy says 4 inches would have been preferable and will most likely be the backbone on next season's build. Using bobweights, Billy has already balanced the crank precisely to the rest of the rotating assembly.

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