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EZ-EFIEZ-EFIWhat you need to What you need to knowknow
Brian ReeseBrian ReeseFASTFAST
FUEL INJECTION 101• Many times a second, a group of sensors
measure various engine and atmospheric conditions.
• Just as fast, the Engine Control Unit (ECU) analyzes the sensor data and commands
the correct fuel delivery.• Sensors also evaluate the accuracy of the EFI commands and use the feedback to fine
tune future commands.
ADVANTAGES OF EFI• More torque and power– Intake manifold can be optimized, improved control of fuel and
spark, tunability• Improved throttle response and drivability– No hesitation/stumble when cold– No vapor lock when hot– Infinitely tuned versus tuned for ‘one spot’ with a carb– Easy starting, regardless of weather
• Better fuel economy– Superior tunability, Wide band feedback and control
• Lower exhaust emissions– Good for many reasons
• Overall increase in engine lifetime– Better running engines last longer
DISADVANTAGES OF EFI• Complicated– Requires advanced knowledge of engine performance
• Tuning is difficult and expensive– Requires a dyno and countless test sessions– Requires a laptop and the ability to use it– Requires a professional tuner
• Expensive– EFI system, manifold, dyno time, laptop, tuner time
• Can’t see it– Little black boxes and a lot of wires
• Fear factor– Horror stories of legend
• Sanctioning bodies– Many don’t embrace or allow EFI
Design Objectives for EZ-EFI• ELIMINATE the Disadvantages of EFI!
Infancy of Program• EFI Guys banned from planning session!– EFI guys don’t understand how Carb guys think
• CARB Guys led the planning and approval sessions!– What do they want, what do they fear, what would get their
interest
• Initial Plan– Easy, Easy, Easy– No “EFI” tech lingo– No Laptop at all! provide a hand held controller or use adjustment
screws. – Make it work just like a carb; a 750cfm carb will work just as good
on a Chevy, Ford, Chrysler, etc!– Delivery a very high value at a reasonable cost– Absolutely no trips to a tuner, dyno, expert, etc
The EZ-EFI Plan• Excellent Performance• EASY no expertise needed
• Self tuning*• No laptop / No tuning needed• Use existing carb manifolds
• Compatible with existing throttle cables• Affordable Price• Highly compatible• Maintenance free
• Support high horsepower
*That actually works!
What is “REAL” Self TuningWARNING: Many companies are claiming ‘self tuning’
• Closed Loop Wide Band Feedback is NOT self tuning• Limited block learn from closed loop is NOT self
tuning• Requiring a ‘pre-tune’ or ‘selecting’ a map to start is
a sure sign of inferior, inaccurate claim of self tuning• “REAL” self tuning does not require a pre-tune or
map at all. EZ-EFI builds a map from SCRATCH!
The (Big) Hurdles
• Proper fuel distribution from a throttle body – Patented design
• Properly functioning and capable self tuning– Easy to learn, INCREADIBLY HARD to only
learn the good stuff and disregard the bad stuff. Over 5 years of development.
• Eliminate the disadvantages of EFI• Keep it affordable
What is Became FAST EZ-EFI
– Eliminated Disadvantages of EFI– Available in single 4bbl, dual quad, and multiport– REAL self tuning that actually works– Capable of supporting up to 1000hp– EASY, EASY, EASY
Installing EZ-EFI
How Long Does it Take to Install?
Professional: 2-8hrs*Do it Yourselfer: A weekend
*Depends on application and fuel system
Installing EZ-EFIWhere is the time?
Fuel system – this is the biggest time variable.
• If the vehicle is already EFI based, fuel setup is very quick.
• For carb conversions, the fuel system requires modification to convert to EFI –
this could be time consuming• EZ EFI Master kit includes FULL Fuel
system
Installing EZ-EFI
Where is the time?Installing the Wide Band O2
• All EZ-EFI kits include a weld-in bung and plug. The bung can be welded in at a shop and plugged for the drive home, or it can be welded in to a header ‘off the
car’.• FAST does NOT recommend “clamp-in” adaptors for
wide band O2. These may appear easy, but they are prone to leaking. Leaking exhaust will kill self-tuning
EFI!
Installing EZ-EFI
Where is the time?
4 wire hookup:Battery PowerBattery GroundIgnition Switch
RPM/Tach Signal
Optional:Fan Relay
A/C
Installing EZ-EFI
Where is the time?
Throttle body, wiring harness, sensors, initial setup – less than 1 hr
Hand Held wizard – less than 10 minutes
Installing EZ-EFIWhere is the time?
Hand held setup wizard
Brian ReeseBrian ReeseVice PresidentVice PresidentEngineering & Business Development Engineering & Business Development COMP Performance GroupCOMP Performance Group
