Gary Conley has made a thirty year career of designing and building high performance engines. The only difference is that Gary ‘s engines are quarter scale fully functional miniatures that run and make horsepower just like real engines. The latest in a long line of Conley engines is the Stinger 609, so named because of its total displacement of 6.90 cubic inches (about 100 cc)
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Gary Conley - The Miniature Engineering Craftsmanship Museum
Quarter Scale
Gary Conley - The Miniature Engineering Craftsmanship Museum
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Engine Downsizing, For Reals: The 6.09-Cubic-Inch, Fully Functioning V-8