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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
60.3 HP

Performance and Technical information on Stage 1 engines for Harley-Davidson motorcycles.

Basic Stage One Engine

The Stage One engine represents a minimum investment of money and time for improving the performance of a 80 CID Harley-Davidson. Most people can perform these simple modifications themselves. Modifications over stock engine are underlined in the specification list below. The estimated cost for these modifications is under $200. The improvements in performance for performing these minor changes is quite good for the dollars spent. Increases up to 18 HP and 17 Ft.Lbs of torque can be seen in some engines.
This modifications performed on an Low Rider was able to produce 13.8 second quarter mile times with a top speed of 93 MPH at the drag strip. These performance results should be a typical quarter mile result for 600 pound bikes (FXR, FXST, FXD) with an 80 CID Evolution motor.

Year: 1994
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: Stock H-D - 208 Duration Intake- 202 Duration Exhaust - .472 Lift
Pushrods: H-D
Carb: Stock CV w/modifications - Idle Mixture out 3.5 turns, Stock needle raised 1/8 inch
Carb Jetting Information: Stock Jets
Manifold: Stock
Air Cleaner: Screaming Eagle K&N
Ignition: Stock Module
Ignition Timing: 32 BTDC
Coil: Stock H-D Dual Fire
Pipes: Stock headers with HD Slip-on Baloney cuts
Dyno Tuning Facilities: CycleRama, Pinellas Park, FL. (813) 546-0889

lr80_603.gif (4743 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 -+-