Originally Posted by
rays04gtx
05 Vs 04 ......05 have a few more tables.
Idle , Idle TQ spark is the same , but 05 has a few more Idle Tq Throttle tables, making BIG Cams trickier to idle , but it can be done.
Airflow ,Electric Throttle , is a big one, 04's don't have any of the "Pedal" tables , but Ironically the 04's have the BEST oem Pedal feel, they are closest to a DBC(drive by cable) feel in OEM form.
DFCO, the 04's there's no way to turn off "spark control" for cut off.
Spark is the big one, 04's don't have a lot of the IAT/ECT modifiers, no start up table. The PT & WOT table the max values are 2-3* different with the 05's being high. MBT tables are the same.
Tq management is another big one, 04's do not have any of the Auto Trans Tq tables.
An interesting difference if you are using the MPVI 2 interface and version 5.0, the Misfire table on the 04 is 5600RPM, while the 05 is 352.
04/05's have 4 02s while your 03 should only have 2 ....other then that it's a cake walk.
05 is the easier of the the 2 to tune when it comes to cams, 05 is the better one with the 545 trans, not a lot of control over the POS 545, but the Tq management tables and Shift reduction time help keep the 545 from self destruction.
My 04 GTX I run a 468 G3 Na , I'm making a little less then 770 Hp on the 04 ECU, so Power can be made with the 04 ECU .
When I bought this truck it was converted over to a t56 already , I've had a 46RH in it, now It has a 727. If this truck didn't have the T56 in it when I bought it, I would of swapped over to the 05 ECU.
Purple Ram's Nephew has an 03 with 2014 ECU, dash cluster and a few other odds and ends, My youngest son also did a 14 to 03 swap.