ZXA5 Base Calibration
Last updated: 11-7-2013
by Michael Decipha Ponthieux
What is the ZXA5 ?
The ZXA4 calibration as well as all the stock CDAN4 calibrations are not optimal from a performance standpoint.
The ZXA5 base calibration, is a theoretical stock calibration for the
1996 Ford CDAN4 ecu's created by decipha. This base calibration is adjusted for highly modified naturally aspirated and boosted engines including:
turbocharged, supercharged, and nitrous, as well as bone stock factory engines. This base calibration can be used on ALL engines controlled by CDAN4 ecu's.
Note: This tune WILL NOT WORK FOR ECU CONTROLLED AUTOMATIC TRANSMISSIONS; furthermore, you must have sailorbob's CRY def for use in
The following are the absolute MINIMUM changes REQUIRED before starting your vehicle utilizing the ZXA5 calibration.
Note** If you do not have injector data for your injector's, I recommend setting both slopes to your ACTUAL injector size, read the FUEL Write Up for more details.
|SARCHG||Cubic Inch Displacement||Input your actual engine size or scaled percentage if applicable (CLICK HERE FOR SCALING)
|FN 036||MAF Transfer||Input your actual MAF flow data from your flow sheet or your scaled percentage if applicable, be sure the top value is 16 volts
|ALOSL, AHISL||Injector Slopes||Input your injector manufacturer's recommended values if available or scaled percentage, see Note** below for no data
|FUEL_BKPT||Injector Breakpoint||Input the injector manufacturer's recommended fuel breakpoint
|FN 367||Injector Offset||Input the injector manufacturer's recommended voltage offset values
|FN 2200||Borderline Spark Table||See note below. Populate this table with adequate values for your specific engine combination. (see notes below)
|FN 035||Load Scaling||Populate the Y-axis with your engines expected peak N/A load values (when not in boost), DO NOT PUT IN MAXIMUM LOAD VALUES WHILE IN BOOST
|FN 348A||Crank PW||Multiply the Y-axis as a percentage of the stock 281 cubic inch and 19 lb/hr injectors values by doing, 19/(new injector size) * (new engine size)/281= 0.xxx
|FN 1327||Injector Output Port||This table must be set to all 0s for those whom have turbo setups with NUMEGO=1
LEAVE THE LAST COLUMN OF THE BASE FUEL TABLE SET AT MAXIMUM, this is done to cause the engine to shut-off during an overheat.
Note**** The ZXA5 timing table is setup for 24 degrees of timing @ 80 load for a bone stock 2 valve headed 4.6L modular engine.
For engines with aftermarket heads, its typical to reach loads greater than 90, increase the ENTIRE TABLE (ALL CELLS)
by the difference of MBT spark at 3k+ subtracted by 23 degrees (current value in tune), MBT reference can be found HERE.
For example: If you have TFS 44 heads [25 degrees] add 2 degrees to the table (25 - 23 = 2), if you have DOHC cobra heads [27 degrees] add 4 degrees to the whole table ( 27 - 23 = 4).
the above mentioned spark adjustment is a general ballpark adjustment, you are still required to adjust individual cells while tuning
Features of the ZXA5 Base Calibration
Simplified Timing to only the Borderline Spark Table
Simplifed Fueling Logic to the Load Scaling Function FN035
Overheat protection will shut the engine off when it gets too hot, will also allow a restart time of approx 13 seconds during an overheat
Although many other values exist in the ECU which can be adjusted to resolve other issues, they are not what I consider
to be ABSOLUTELY REQUIRED. In short, the variables listed above are the most important variables in your calibration.
For dry shot nitrous engines, I recommend reducing the FN 303 - WOT Lambse Multiplier to add fuel (ex: 0.864 instead of all 1.000).
Obviously you still tune as you would otherwise, the ZXA5 is just to get you on your way much easier and faster, one is still required to dial in Fuel, Air, and Spark just as you would otherwise.
As with all EFIDynoTuning tunes, be sure to read over the Pre-Tuning Information.
The Initial Tune Instructions and Post Tune Instructions apply as well.
NOTE: You must have the COMPLETE CDAN4 Strategy from Sailorbob to use this base tune.
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