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


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Spark Plug Wires

Performance and Technical information on  spark plug wires for Harley-Davidson motorcycles.

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. The claims range from the mildly interesting to completely absurd. When reviewing many of the advertisements for some of these products, a small element of truth may exist in the claim. V-Twin Café believes that most of the claims are based upon before and after testing comprised of aged components compared to the installation of new, high quality components. This is the situation that most consumers will be in when they look for a set of ignition wires.

Since you are reading this article, it must be assumed that you are serious about engine performance and are looking for solid facts. In the July 1997 issue of Hot Rod Bikes (Peterson Publishing Company) pages 72 to 80, a series of dyno runs were conducted on ignition wires from several manufacturers. The results of the test provided V-Twin Café with some interesting discussions with other people in the performance industry. Despite some of the results of the dyno tests by HRB, V-Twin Café believes that claims of increases in performance that seem to good to be true, probably are. With that in mind, an excellent description of spark plug wires and their relationship to spark plugs, the coil and the ignition module were created by Magnecor, a manufacturer of high performance plug wires. V-Twin Café presents this informative information by Magnecor to let you make up your own mind. I can tell you that engines built by Bike Tech do not use any components making claims of 'magic horse power'. While V-Twin Café can not substantiate the claims of increased horsepower by companies like Nology and Splitfire, we feel that engine builders that are serious about increasing the performance of their equipment will do the proper research to make a proper choice.

bulletFrequently Asked Questions about Ignition Wires
bulletThe Truth About Ignition Wires
bulletRace Wires : Inside Information
bulletMagnecor Home Page


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 -+-