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


Electronic Fuel Injection Project

Maximum Air Delivery (MAD) is required in order to create a high performance engine. Race bike, big inch custom or a street fighter, it is important that you get MAD for serious horsepower. We have taken 10 years of MAD technology used in some of the best marine race engines in the world and applied them to the V-Twin world of Harley-Davidson.

With a massive throttle plate measuring 2.750" by 2.125", the intake manifold and ECU used with this EFI is capable of supporting in excess of 200 horsepower in a normally aspirated engine. Maximum power for turbocharged or supercharged engines are limited only by engine building skills. Poor throttle response on big cam'ed engines become a thing of the past with this EFI.  Whether you running an 80CID street-fighter, a 131CID custom cruiser or a 160CID race bike, your horsepower will be limited by capabilities of the engine components not the ECU or intake manifold. Click here to view the installation manual for this EFI. For more information on the MAD V2 EFI project contact us at 

MAD EFI Performance Update

Nightrider's 1994 FXDL equipped with a MAD EFI set an ECTA Land Speed Record of 131.965 MPH in the MPS/PG 2000 class on October 27, 2001. The record was set on a street bike equipped with un-ported EVO heads, SE-57 cam, SuperTrapp 2-1 exhaust and Axtell 3 13/16" cylinders.

Not a bad speed for not much more than a stock engine.

Below are pictures of the new MAD EFI unit for HD V-Twin engines.  The EFI unit has undergone extensive testing on a 97CID EVO engine. Continuous testing ensures that this EFI meets current and future performance needs for your V-twin engine. The MAD V2 EFI is now available for serious performance bikes.

MAD-EFI can also provide the EFI ECU, manifold and other individual components for race bikes or other custom build applications. 

Systems Features:

bulletRace proven ECU that has been used in automotive and marine environments for many years.
bulletCustom design,  maximum air delivery intake manifold based on race proven technology.
bulletWorks with your existing ignition system. The ECU is triggered by the ignition pulse to the front cylinder. Single fire ignition is required.
bulletECU will handle gasoline and methanol fuels with no changes to the the electronic unit.
bullet All programming is done through the LCD programmer. Simple trackside setup and adjustments. No PC is required to program the ECU.
bulletECU will control two or four injectors, allowing fine control over fuel mixtures in high horsepower situations.

Systems Include:

bulletHarley-Davidson EVO and Twin Cam style intake manifolds with 2.750" x 2.125" inch throttle plate. The intake manifold can be machined to width for use on longer cylinders.
bulletECU - Electronic Control Unit
bulletLCD programmer
bulletAir temp sensor
bulletCHT sensor
bulletMain wiring harness
bulletInjector harness
bulletFuel Mixture trim control, +/ - 50%
bulletComprehensive Installation and User Manual (Available online)
bulletMAP sensors (1,2 or 3 Bar). 1 Bar is used for normally aspirated engines. 2 or 3 Bar units are used with forced induction engines.
bulletBosch Injectors sized to engine power.
bulletFuel pump
bulletTPS sensor

Adjustable Parameters

bulletRPM fuel mixture - every 250 RPMs
bulletManifold pressure fuel mixture - 64 settings
bulletCHT temperature fuel mixture - 32 settings
bulletStart function fuel mixture - 33 settings
bulletAccelerator pump function - 3 adjustments
bulletClosed loop - 5 adjustments
bulletBoost limiting adjustment
bulletRev limiting fuel shutdown adjustment

Optional Items

bulletOxygen sensors (1 and 3 wire)
bulletLED mixture meters
bulletFuel pump relay
bulletRPM switch
bulletKnock sensors
bulletFast idle solenoids
bulletTwo injector per cylinder control

MAD EFI V2 Intake Manifold

EFI Manifold Installed on 94 FXDL

The system is show above installed on a 1994 FXDL with a 97 cubic inch engine. The large throttle plate is quite obvious in this picture.

The MAD-EFI has a large air cleaner that does not limit power. The fuel rail and pressure regulator can be seen just below the air cleaner.

Dash with the LCD Programmer and Mixture Adjustment Knob mounted


ECU, Fuel Pump and Fuel Return line mounting for FXD style frames can be accomplished on the right side of the engine.

EFI intake manifold casting, machining and custom ECU programming provided by Taylor Marine . Test bike, tuning and technical advise provided by



Table of Contents
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Nightrider COPYRIGHT

Ask us a Question

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 -+-