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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

DEWEY'S CUSTOM
Rammer Performance Air Cleaners
TC Performance Heads 100+HP

Pro Tuning on a Shade Tree Budget

   
Harley-Davidson

Engine Performance Dyno Runs
70.0 HP

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

Stage Two Engine Basic

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 a Crane Fireball 310 camshaft. The original cam bearing was removed and replaced with a Torrington. To speed the installation of the cam, Crane Time-Saver push rods were used. These push rods allow you to cut out the old push rods and install the new ones without removing the rocker boxes.
Testing on the Stage One engine with a Dyna 2000 ignition module produced very poor results. The addition of the Crane HI-4 ignition module was used. The HI-4 allows complete tuning of the advance curve andlet the engine take advantage of the higher RPM range of the new cam. The rev limiter on the ignition module was set to a very conservative 5800 RPM. The maximum RPM range for a Stage II is 6200. A maximum of 70 HP occured at 5500 RPMs, with maximum torque of 78 ft. lbs. at 2600 RPMs.
The dip in the HP and torque curves is likely due to the CV carburetor. A different needle or changing to an after-market carb should smooth the curves. A basic stage two engine does not include the additional $350 to $600 it would cost to buy the carb.

Year: 1997
Model: EVO
Bore: Stock
Stroke: Stock
Displacement: 1340cc
Cases: H-D
Assembly: H-D
Ignition: Stock 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: Crane Fireball 310
Pushrods: Crane Time Savers
Carb: Stock CV w/ThunderSlidet Kit- Idle Mixture out 3.5 turns
Carb Jetting Information: Slow Jet 48
Manifold: Stock
Air Cleaner: UniFlow with modified HD air box
Ignition: Crane HI-4
Ignition Timing: 32 BTDC
Coil: Stock H-D Dual File
Pipes: Stock H-D header pipes with modified Cycle Shack Slip-Ons
Dyno Tuning Facilities: CycleRama, Pinellas Park, FL. (813) 546-0889

 

97fbstage2.jpg (42902 bytes)

 

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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
Shovelhead
Sportster
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
Camshafts
Selecting a cam
Install a TC 88/95 cam
Install a Big Twin cam
Install Sportster cams

Camshaft Specifications
Twin Cam
EVO
Shovel
XL


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

SHOP TALK
Shop Manual
Carburetor
Carburetor Troubleshooting
Exhaust
Ignition
Finding Manifold Leaks
Camshafts
Cylinder Heads
Pistons and Cylinders
Clutch
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
Miscellaneous
Performance Calculations
Estimate Horsepower
Estimate 1/4 Mile Time
Estimate Top Speed

Engine Displacement
Exhaust Length
Gear Ratios
MPH at RPM
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 -+-