If you like the chip, FRPP EPEC is the next step for you. It is a programmable computer which is designed to work with the EEC or as a stand alone unit. Many programmable computers are out on the market, but remember, EPEC is made for FRPP by General Systems Research. Can't go wrong with it.
There are two models, one for 88-93 Mustangs (compatible with 86-88 Mustangs with SVO Mass Air Conversion Kit) and one for 94-95 Mustangs.
EPEC will give you many (read too many for a novice) possible adjutment parameters, and when used right, will produce awesome outcome. Beware, that wrong programming will cost you more than just a head gasket. I switched to EPEC from the Extender setup, basically due to the tunability of this unit. The interface is a program which runs on a Notebook PC, which connects to the EPEC Unit via serial port.
EPEC unit will piggy back from your original EEC, just like the Extender unit will. To mount it in the original kick panel is probably not possible with the added unit and the cables. I have it laying under the passenger's seat, readily available for programming.
Here are some of the features EPEC provides:
Fuel Strategy: Just like the carburetors, setting main jet size, power valve selection and idle air bleeds. A/F Ratio is the pounds of air measured by MAF divided by the amount of fuel, hence depending on the amount of air the motor can flow, amount of fuel needs to be adjusted accordingly. Typically, WOT A/F Ratio of 12.5:1 & at idle and part throttle 14.6:1.
Spark Strategy: Simply stated, to adjust the total spark advance for your motor. A typical total spark advance ranges between 26 to 36 BTC depending on the motor. Spark advance tables will be based on Idle, Part Throttle & WOT. However, there are many other things that affect this, and hence perfect spark advance timing curve for your motor must be achieved by trial and search.
*total of 4 programmable and 3 analog multipliers.
Engine RPM Limiters:
Data Aquisition & Data Logging
As you can see, the EPEC module provides complexed number of parameters to be controllable, and when used correctly, it will provide the ultimate setup for your motor. But when programmed incorrectly, it will spell DISASTER!! For myself, I've got a lot of tuning to do this season.... hoping to find the perfect combination.