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


Ignition Modules

Screamin' Eagle by Harley-Davidson

Performance and Technical information on ignition modules for Harley-Davidson motorcycles.

Screamin' Eagle

The Screamin' Eagle ignition system comes in several different variations. The original Screamin' Eagle module had an external Rev Limiter that was required to set the RPM limits below the modules preset 8000 RPM limit. There is now a 6000 RPM street module for Big Twin engines that is  50 states, emissions legal and the original 'race only' unit. The modules replaces the stock HD ignition module, requiring only that it be plugged into the stock wiring harness.

While Bike Tech does not have before and after comparisons for the stock HD module vs. Screaming module(s), it does have experience with the new 6000 RPM street module. This module has provided good service on a 1997 FXD equipped with a modified CV carburetor, Screamin' Eagle Air Cleaner and Harley-Davidson slash cut slip-on mufflers. Power for this engine combination is 64 HP at the rear wheels, up from a stock 54 HP.

In the same 1997 FXD, adding an Andrews EV-46 raised the power to 74 HP at the rear wheels. This only confirms our recommendation that the Screamin' Eagle ignition module is a best buy for street and mildly modified engines.

In yet another improvement to the 1997 FXD, the Screamin' Eagle ignition module performed was used with a set of the new Screamin' Eagle 1340 Evolution performance heads. The FXD's ignition performed flawlessly while producing 82 rear wheel horsepower. While it would have been nice to have a rev limiter greater than 6000 RPMs for a Stage 3 engine, the SE module was designed for street use where the 6000 RPM limit makes good sense.

The Screamin' Eagle Part numbers for 1340 engines are:

bullet96 and Later 1340 models ...32630-96
bullet94-95 FLH/FLT models ...32595-96
bullet84-95 1340 models ...32596-96

The list price for all the modules is $114.95.

We Highly Recommend the use of this module with stock and mildly modified bikes. The cost of this module is low and the performance is excellent.


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 -+-