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Here’s Bill Rucker’s version of an X-Wedge rocket. |
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The all-new S&S X-Wedge, pronounced cross or ex, is a 56-degree, closed-loop fuel-injected, three-cam, overhead valve v-twin designed to deliver the performance expected of an S&S engine, while complying with EPA laws. Initially, the X- Wedge will go to OE manufacturers of production customs in engine sizes of 117 and 121ci—with larger packages to come later. The 56-degree v-twin utilizes three belt-driven, large base-circle cams; two exhaust cams and a common intake cam achieve almost straight pushrod angles that combine with automotive-style rockers and roller tappets to create an incredibly quiet, EPA noise conscious valve train. The X-Wedge is actually 5db quieter than a 41⁄8 S&S 117ci engine from 2000rpm through 5000rpm. |
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***NOTE These images represent a production intent prototype. Final production engines may have slight differences |
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The cylinders use the five-bolt pattern, have no oil return holes and are common design for front or rear placement. Their round shape reduces bore distortion and computer designed progressive fin spacing increase the cylinders cooling capabilities. The cylinders are die-cast over the most aggressive liner seen in the industry to ensure heat transfer and permanent adhesion between the cast iron liners and the aluminum that surrounds them |
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With the Teardrop air cleaner off, a clean view of the S&S; single bore throttle body is offered. The X-Wedge has closed- loop fuel injection. |
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The X-Wedge has its fuel injectors built into the cylinder head |
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With almost perfect pushrod geometry; the X- Wedge can use automotive style rockers. All you do is remove the rocker cover—which is just a cover and offers no valve train support—and there is easy access to the rockers. |
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The new X-Wedge uses a single-coil valve spring to help minimize valve train noise. |
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As you can see, the pushrod tubes on the X- Wedge are huge. Oil runs up through the pushrod, and oil and air are carried back down through the pushrod tube. |
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To create better gasket seal, the X-Wedge has five cylinder studs. Cylinders are the same front and rear. |
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This close up shows you how efficient the combustion chamber is—there is a straight line from intake to exhaust allowing the wedge chamber to maximize performance. |
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This cylinder shot shows you just how much material is in the cylinder liner, plus it this shows the incredible grip created between the liner and the cylinder material. |
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The heart of the the BEAST we fear no evil |
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X-Wedge lifters are held in place with locater pins. The lifter covers are interchangeable front to rear. With a large and small hole in the case, there is plenty of space for oil to pass back to the oil pump and air to move. |
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A comparison between an S&S; T-Series lifter and the shorter X-Wedge lifter. |
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Removing the belt starts with loosening the pressure on the spring-loaded tensioner. Next, any of the top idler pulleys is removed and the tensioner is kept in a relaxed position. Now the belt can be slipped off. |
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The belt is advanced technology from Gates just for this engine. Note: the engine is a free spinning design, so if the belt should ever break, the valves will not hit the pistons or each other. |
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Once all the bolts are out—by the way, all of the bolts used in the rocker covers, cam cover and cam plate are the same size and length to simplify assembly—the cam plate and cams lift off easily. |
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The cams have flats that accommodate an open- end wrench for easy swaps in the future. |
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The Crank Position Sensor (CPS) reads off the side of the flywheel. Removing the case gives you a good look at the massive crank assembly… |
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The X-Wedge uses side-by-side rods and plain bearings. |
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To set the belt timing, pins are placed in each pulley… The belt is positioned, the idler installed and then the pins can be removed. Simple. |
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This shot of the cylinder head and rockers makes it easy to emphasize the simplicity of the rocker cover. There is just one gasket surface to maintain and you can see it is generously wide for a solid gasket sealing area.Met dank aan S&S; Cycle Inc. voor de info en fotos |
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