T4M2 / U4P2 Base Calibration

by Michael Decipha Ponthieux
Posted: 8-11-2012
Last updated: 4-21-2015

Supported Codes
The T4M2 and U4P2 base calibrations can be used
in lieu of the following factory calibrations.

CBAZAJ4J1T4M0ZA0
CBAZAFCL0S4M1U4P0W4H0L4C1
A4A1A4A1
Strategy swaps require Moates hardware.
CBAZA does not support EDIS, an A4A1 strategy is required for all EDIS swaps.

What is the T4M2 / U4P2 ?

The T4M0 / U4P0 calibrations including all the other stock CBAZA calibrations are not optimal by any means. Although the SN94-95 Mustangs did get a significantly BETTER calibration than the older foxbody ecu's. Some changes can be made to improve overall driveability and performance. The T4M2 / U4P2 base calibration, is a theoretical stock calibration for the SN94-95 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 1994-1995 mustang ECU's.

Note: T4M2 is to be used with manual transmission and non-ecu controlled auto's; the U4P2 is to be used with ECU controlled Automatic Transmissions.

REQUIRED VALUES

The following are the absolute MINIMUM changes REQUIRED before starting your vehicle utilizing the T4M2 or U4P2 calibration.
PIDVariableComment
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.
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 302 cubic inch and 19 lb/hr injectors values by doing, 19/(new injector size) * (new engine size)/302=0.xxx
FN 1329Injector Firing OrderThis table must be set to 1-6-4-2-5-8-7-3 for those whom have done decipha's Foxbody to CBAZA SWAP"
FN 1327Injector Output PortThis table must be set to 0-0-2-2-2-0-0-2 for those whom have done decipha's Foxbody to CBAZA SWAP"
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 T4M2 timing table is setup for 30 degrees of timing @ 70 load for a bone stock E7 headed 5.0 mustang.
Add 1 degree to ALL CELLS AT 70 LOAD AND ABOVE for E7 headed engines AFTER fuel has been dialed in.
For engines with aftermarket heads, its typical to reach loads of 90 and greater, increase the ENTIRE TABLE (ALL CELLS)
by the difference of MBT spark at 3k+ subtracted by 28 degrees (spak at 90 load), MBT reference can be found HERE.

For example: If you have GT40P heads [28 degrees] add 0 degrees to the table (28-28=0), if you have GT40s [34 degrees] add 6 degrees to the whole table (34-28=6).
the above mentioned spark adjustment is a general ballpark adjustment, you are still required to adjust individual cells while tuning

Features of the T4M2 and U4P2 Base Calibrations

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 >242* ECT, will also allow a restart time of approx 13 seconds during an overheat to safely move the vehicle.

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).

Tuning

Obviously you still tune as you would otherwise, the T4M2 / U4P2 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.

If your tuning with TunerPro, be sure to download our CBAZA.xdf
If your tuning with BinaryEditor, the latest open-source CBAZA strategy can be downloaded from EECAnalyzer.net
However, I HIGHLY recommend all BE users to get the COMPLETE cbaza strategy from Sailorbob.


Download - T4M2 / U4P2

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