Edelbrock 3670 User Manual - page 11
Installation and Setup
11
clean, and reliable.
IMPORTANT!
TO AVOID SERIOUS OR FATAL INJURY, NEVER ATTEMPT
TO WORK WITH THE CALIBRATION LAPTOP COMPUTER
WHILE DRIVING VEHICLE.
NEVER PERFORM CALIBRATION ACTIVITIES ON PUBLIC
STREETS OR HIGHWAYS! DISTRACTION AND/OR
INADVERTENT CALIBRATION CHANGES COULD RESULT
IN SERIOUS ACCIDENTS.
Calibration Introduction
Calibration of an EFI system, presents many challenges and opportunities. The
opportunities are to improve the throttle response, drivability, start ability, fuel economy,
reliability, and reduce emissions of almost any engine. The challenge centers around
optimizing a myriad of variables for every operating condition of the engine to achieve
the desired results. While certain parameters can be “learned” by the engine control
computer through various strategies and algorithms; it ultimately becomes the
responsibility of the calibrator or tuner to decide what the ECM should learn, and to make
critical decisions about how the particular engine he/she is calibrating will behave under
various conditions. Just as it takes time and effort to become a proficient carburetion
calibrator; so it will take as much or more time and practice to become a good EFI
calibrator. Do not become discouraged or intimidated. Start with the basics of fuel and
spark control, then gradually work up to cold starting, transient calibration, idle control,
individual cylinder control, and advanced functions and setups. Always remember to start
with conservative values for spark, fuel, etc. to avoid damaging the engine. (Minimal
spark advance with fueling on the rich side of optimum)
Most tuners agree there is great personal satisfaction when an engine with their own
“optimized” calibration is running well. This calibration guide assumes the reader to be
familiar with general engine tuning and concepts, and experienced in the requirements
and limits of the engine being calibrated. Since each engine and application differ; this
manual does not attempt to dictate detailed tuning specifications (such as dictating "X
degrees of spark advance at 5% load and 800 rpm”) rather; its purpose is to familiarize
the calibrator with the interface software, techniques for tuning various strategies, and
provide background information on how they are used. The user assumes all
responsibility for the application and use of the information and Edelbrock system
software & hardware.
While this guide should prove helpful; it is significantly condensed and simplified to allow
the calibrator to quickly reference specific sections. Depending on your specific system