Basic Stage Two Engine Design

The Stage Two Basic engine represents a more extensive approach to improve engine performance with bolt-on components and a bolt-in camshaft. Most people can perform these modifications themselves. Modifications over stock engine are underlined in the list below. The estimated cost for these modifications ranges from $700 to $1000. The performance return for these changes can be large for the dollars spent. Increases up to 30 HP and 20 Ft.Lbs of torque can be seen on some bikes.
The major changes for a Stage Two Basic engine over the Stage One Advanced is the addition of an Andrews EV-46 camshaft. The original cam bearing was removed and replaced with a Torrington. The stock Harley-Davidson  push rods were used.
Prior testing with the Screamin Eagle 6000 RPM street  ignition module had already produced excellent. No reason was seen to change from the SE ingition module. A maximum of 73.9 HP occured at 5950 RPMs, with maximum torque of 78.1 ft. lbs. at 4100 RPMs.
The HP and torque curves for this engine combination was very smooth, with a broad torque curve over 70 ft. lbs. starting at 2500 RPMs and extending to 5400 RPMs.

Year: 1997
Model: EVO
Bore: Stock
Stroke: Stock
Displacement: 1340cc
Cases: H-D
Assembly: H-D
Crankshaft and Flywheel: H-D
Heads: H-D
Intake Valves: Stock Diameter
Exhaust Valves: Stock Diameter
Valve Springs: H-D
Porting: None
Compression Ratio: 8.5:1
Pistons: H-D
Cam: Andrew EV-46
Pushrods: H-D
Carb: Stock Keihin CV with DynoJet recalibration kit installed
Carb Jetting Information: 180 main jet, 45 slow jet installed
Manifold: Stock
Air Cleaner: Screamin Eagle K&N
Ignition: Screamin Eagle 6000 RPM street module
Ignition Timing: 32° BTDC
Coil: Screamin Eagle Dual Fire
Plug Wires: Magnecor 8.8mm
Pipes: Stock headers with HD Slip-on Baloney cuts
Dyno Tuning Facilities: CycleRama, Pinellas Park, FL. (813) 546-0889

73.9 HP @ 5950 RPM
78.1 ft. lbs. Torque @ 4100 RPM