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 BE only.


The following are the absolute MINIMUM changes REQUIRED before starting your vehicle utilizing the ZXA5 calibration.
SARCHGCubic Inch DisplacementInput your actual engine size or scaled percentage if applicable (CLICK HERE FOR SCALING)
FN 036MAF TransferInput your actual MAF flow data from your flow sheet or your scaled percentage if applicable, be sure the top value is 16 volts
ALOSL, AHISLInjector SlopesInput your injector manufacturer's recommended values if available or scaled percentage, see Note** below for no data
FUEL_BKPTInjector BreakpointInput the injector manufacturer's recommended fuel breakpoint
FN 367Injector OffsetInput the injector manufacturer's recommended voltage offset values
FN 2200Borderline Spark TableSee note below. Populate this table with adequate values for your specific engine combination. (see notes below)
FN 035Load ScalingPopulate 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 348ACrank PWMultiply 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 1327Injector Output PortThis table must be set to all 0s for those whom have turbo setups with NUMEGO=1
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.
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

Other Variables

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.

Download - ZXA5

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