A few key engineering designs
are showcased in the following photos. We used the S&S
cutaway engine to give you maximum visibility of this revolutionary
engine
Fred’s flat-top pistons.
S&S 117ci X-Wedge Specs
Bore = 4.125”
Stroke = 4.375”
Displacement = 117 CI
Cylinder head design = 2 valve Cross Wedge
Valve sizes = 2.0” Intake and 1.6” Exhaust
Pistons = Forged with no notching, common front to rear,
.927” wrist pin diameter
V angle = 56.25 degrees
Cam Drive = Gates 30 mm wide system with automatic tensioner
Valvetrain = Hydraulic roller tappet with pushrods
Rocker arm ratio = 1.7:1
Crankshaft = Forged and nitrided one piece
Rod type = 7.400” forged split design with 7/16” bolts
Bearing Type = Tri metal plain style rod and main
Main bearing journal dia.= 2.36”
Rod bearing journal dia. = 2.20”
Oil system = Dry sump with internal gerotor pump
Induction and Engine Management = 2-1/16” throttle
body with S&S closed loop VFI
Fuel injectors = 34.8 lb/hr @ 3 bar fuel pressure
Complete engine weight = 163 lbs
Crank and rod assembly weight = 42.75 lbs
4 bolt engine mount system using 7/16” fasteners
Compression ratio = 9.75:1
***NOTE These images
represent a production intent prototype. Final production
engines may have slight differences.
Close up view of exhaust flange mount—standard
design, new location.
The X-Wedge has its fuel injectors built into the cylinder
head.
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.
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.
The new X-Wedge uses a single-coil valve spring to help
minimize valve train noise.
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.
To create better gasket seal, the X-Wedge has five cylinder
studs. Cylinders are the same front and rear. |
