Get XiED(tm)! Performance Parts

Don't let the Harley heat monster ruin your riding.
Reduce  Engine Surging
Improve Throttle Response
Reduce Engine Ping


HD 2007/2008 Engines

High Heat on 2007/08 HD engines

HD 2007/08 Performance Recommendations

Cool your exhaust temperature with the Wide Band O2 upgrade for 2007/08 HD

Harley Camshaft Specification Tables

HD Twin Cam Engine Builds
TC 128 HP 95 CID
TC 100HP Street Engine

The basics of Fuel Injection explained

Rammer Performance Air Cleaners
TC Performance Heads 100+HP

Pro Tuning on a Shade Tree Budget


Engine Performance Dyno Runs
73.9 HP

Performance and Technical information on Stage 2 engines for Harley-Davidson motorcycles.

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

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Last updated June 22, 2006
Copyrightę 1996,1997,1998
Stephen P. Mullen
P.O.Box 1085, Oldsmar,FL 34677
All rights reserved
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The Horsepower Gallery provides an extensive list of bikes , the power they produced and the major engine components.


Table of Contents
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Modification, Installation, Maintenance and Tuning Index  will help you find most of the information you want on one page.

How to get Professional Tuning Results at home
Testing the Innovate Motorsport LM-1 portable air fuel meter

Profession Tuning on a Shade Tree Budget

Veypor VR2 Data Logger and Instrument Panel
Video Installation and Demo
Purchase VR2

Engine Performance
How to Build a
TC96 2007 Engines
TC88 70HP Stage1  
TC95 128HP Stage 3
TC95 100HP Street
TC96 2007 Stage 1/2
EVO 64 HP Stage 1
EVO 74 HP Stage 2
EVO 82 HP Stage 3
EVO 95 HP Stage 3
883 to 1200 Upgrade
Shovelhead Modifications

New EFI for EVO and TC

Performance Gallery
Horsepower Gallery
Evolution 80
Twin Cam 88/95
Evolution Unlimited
Sportster Unlimited
Drag Strip Gallery
Land Speed Racing Gallery
CV Carburetor
Modifying the CV carb
Tuning a CV carb
Selecting a cam
Install a TC 88/95 cam
Install a Big Twin cam
Install Sportster cams

Camshaft Specifications
Twin Cam

Exhaust Systems
EVO Exhaust Testing
TC Exhaust Testing
Khrome Werks AR100 test
Making Drag Pipes Work

Shop Manual
Carburetor Troubleshooting
Finding Manifold Leaks
Cylinder Heads
Pistons and Cylinders
Belt Drive
Shop Manual Appendix
$20 Bike Lift
Plug Wires
Spark Plugs
Engine Tuning
Nitrous Oxide
Motor Oil
Stutter Box
General Information
WEB Links
Buy Books and Manuals
Performance Calculations
Estimate Horsepower
Estimate 1/4 Mile Time
Estimate Top Speed

Engine Displacement
Exhaust Length
Gear Ratios
Air Density

The Nightrider Diaries
The ramblings of a genius a, a madman and something in between.

Where is Sifton Cams?

Autocom Active-7 tested

Harley-Davidson EFI
-EFI basics explained
-EFI modifications explained

183 HP, 2 carbs, 2680cc

Copyright 1997-2006  Stephen Mullen, Oldsmar, FL -+-