I have a 2013 Ram 1500 Laramie with the Hemi. Are there factory horse power restrictions on this engine until it reaches a certain amount of kilometers? I heard that you do not get your full horsepower until the truck has gone through a break in period.
Not that I'm aware of. I have an '06 1500 w/Hemi and have never had felt any restrictions. There is a speed limiter of sorts that is based on the speed rating of the tires. They may be referring to a rev limiter if the truck is in park or neutral?
I can tell you my fuel mileage gradually increased as the engine "broke in". I've got 186,000+ miles on it now and have average 17.5 mpg (kept a fuel log) over its lifetime.
Proper 'break-in' does require sensible driving habits, but I don't think that there is engine software that reduces power during that time. Drive it like you normally do.
A couple of strong, loaded acceleration bursts are suggested for proper piston ring seating, but no unloaded high rpm as that can cause damage. I believe that there is a rev-limiter for Park or Neutral high rpm that keeps the engine under 3000 rpm in these ranges.
Engine torque may be de-rated in certain conditions (like a limp-in) when there are faults present, such as an electronic throttle body (drive by wire) control issue, etc.
The torque converter may have a 'break-in' software program in the TCM that 'burnishes' the clutch friction surfaces for the first 1000 miles. It is a scan tool menu selection under 'Replaced torque converter/TCC break-in'. Proper t/converter break-in should keep the clutch from shuddering and give long life.
TORQUE CONVERTER CLUTCH BREAK-IN PROCEDURE
This procedure is used to properly condition torque converter clutch to prevent shudder during clutch engagement. Break-in procedure must be used if torque converter is replaced or TCM is changed from one vehicle to another. TCC break-in procedure must be reset to start process. Break-in procedure is performed in 3 stages; START, IN-PROGRESS and COMPLETE. In the START stage, full clutch engagement exists. In the IN-PROGRESS stage, partial clutch engagement exists with progressive clutch slippage. In the COMPLETE stage, partial clutch engagement exists with 60 RPM clutch slippage. TCC break-in procedure will be reset to START to indicate test has been successfully completed.
Connect scan tool to DLC located under driver's side of instrument panel. Follow scan tool prompts to TCC BREAK-IN, in the TRANSMISSION CONTROL MODULE/MISCELLANEOUS section. Start procedure as commanded by scan tool.
PINION FACTOR PROCEDURE
NOTE:It may be necessary to consult manufacturer to determine Final Drive Ratio (FDR) number when performing pinion factor procedure.