Ignition Systems

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HD 2007/08 Performance Recommendations

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	Harley Camshaft Specification Tables
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Ignition Systems

Performance and Technical information on ignition modules, coils, spark plugs, spark plug wires and other ignition system components for Harley-Davidson motorcycles.

Ignition Timing

	Setting ignition timing for OEM Harley modules
	Setting ignition timing for aftermarket ignition modules

Ignition Modules

	Single Fire vs. Dual Fire
	Dyna 2000 by DynaTech and Screamin Eagle adjustable
	HI-4 by Crane
	Screamin Eagle by Harley-Davidson
	Ignition System components diagram

Spark Plugs

Spark plug application and interchange chart for Harley-Davidson motorcycles

Spark Plug Wires

The number of performance claims that exist around a simple spark plug wire could lead you to believe that all your performance problems can be solved with the simple purchase of a set of spark plug wires. Learn more to make your own decision.

Solving Sportster Detonation

Sportster engines are notorious for low RPM detonation. Read about possible causes and fixes.

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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