Computer Governs HP for XXXX miles then more HP???

[300C_AWD]

I did remove the 2 rear mufflers. But I have the 4 Muffler Borla system so now it is the 2 muffler system...

If you look at the before and after HP and Tourqe lines, the first one was at 2200 miles and the other at 9990 miles..
Tourqe and HP were over the entire powerband, I believe that is from Dodge and them limiting power when the engine is new.. When I got it, I could not spin the tires without power braking, but after around 5000 miles, I could spin them for 20 feet from a stop, and that was before any of the mods..
BUT, Volant intake and Borla Exhaust seems good for at least 11 rear wheel HP
Now we shall see what the chip does..

I've seen this mentioned in more then one place. People are claiming the engine is being governed during a long breaking in period. After XXXX miles the Computer will change parameters thus switching to a higher HP mode.

"If" and that's a big "if" this is true then much of the gains noted with the jet chips can be explained.

http://www.dodgetalk.com/forums/showthread.php?t=47151

[300C_AWD]

Also look at this dyno from the same thread. They are complaining the gains are a marginal 11hp "peak" after break in and air/ exhaust mod. If you look at the lower end of the RPM's you can see about 38lbs more torque and 25hp at the Rear wheels. This is where he is getting the tire spin. That's a hell of a gain where it counts. The first dyno was before break in the second was after. It really looks like low and mid range torque was being being limited to me. Air and exhaust mod's don't give you much gains in the low end.

http://www.members.cox.net/ebaystuff/dyno.jpg

From this thread
http://www.dodgemagnum.net/phpBB2/viewtopic.php?t=5498

[Northern Rider]

The theory that the ECM retards performance during the first few thousand miles is possible. That would mean that when the magic mileage was reached, we would see a sudden, marked improvement, if we were in the habit (as some here are) of accelerating briskly. I've never heard anyone talk of a sudden change.

Another possibility is that all the engine, transmission, drivetrain tolerances are very close (tight) from the factory, as the steering is. If this were the case, the system would gradually loosen up, revving easier and producing more HP and Torque.

[cmego]

Originally Posted by Northern Rider

The theory that the ECM retards performance during the first few thousand miles is possible. That would mean that when the magic mileage was reached, we would see a sudden, marked improvement, if we were in the habit (as some here are) of accelerating briskly. I've never heard anyone talk of a sudden change.

Ford's EEC-V did this 10 years ago. Anyone in the 10K mileage range care to comment?

[stunna55]

i've got right at 10k, and it feels the same for me. this is interesting though...

[rogue]

I'm at 13k with no difference. People with wishfull thinking...

[WhiteDiamond]

Most of my 2 door sports cars are GM make and I can comment on F-bodies and Vettes seeing increasing response/power as the milage increases. The general milage accepted is 5000 miles for those PCMs, last I saw, and I know that my various cars did see improvments after several thousand miles. Most of the good tuners for GM cars/trucks know where GM hides 'torque management' routines that are thought to be watchdogs within the PCM.

I don't see why DC wouldn't be doing the same. I also bet there are many torque managment routines in there as well(such as dropping timing during a tranny upshift so full torque isn't seen by the tranny). I guess GS Motorsports should be able to give us more info on this now that they can work with the PCM tuning.

Todd

[CITADELGRAD87]

On a related note, I was going to post a new topic, and will after I type this,

I've got just over 4500mi, and I noticed that starting on the last tankful of gas, my mileage as calculated by the EVIC has plunged, suddenly, from 17+ to 14. I have not consciously changed my driving habits, and it was steady at 17 since the day I picked it up.

Do you all think this could be related to more avaiable ponies?

["C"for me]

14K miles or so. I have NOT noticed a drop in MPG, but I do see (feel?) that the car is far more responsive/powerful than just a few K ago. Could it be because the air is COLDER in winter? I do NOT subscribe to the myth of (blank) miles or hours issue. But, I gotta tell you this car is a freakin beast now. Cold air? Hours? Miles? I don't care. I spend $xxxx on gas and I love it!

[skulltatt]

Originally Posted by WhiteDiamond

Most of my 2 door sports cars are GM make and I can comment on F-bodies and Vettes seeing increasing response/power as the milage increases. The general milage accepted is 5000 miles for those PCMs, last I saw, and I know that my various cars did see improvments after several thousand miles. Most of the good tuners for GM cars/trucks know where GM hides 'torque management' routines that are thought to be watchdogs within the PCM.

I don't see why DC wouldn't be doing the same. I also bet there are many torque managment routines in there as well(such as dropping timing during a tranny upshift so full torque isn't seen by the tranny). I guess GS Motorsports should be able to give us more info on this now that they can work with the PCM tuning.

Todd

The increase in performance of the LS1 engines has been attributed to the engine loosening up with more miles not the PCM at a given milage. It is not uncommon for cars to have torque management, especially auto trans, and this makes since to keep the drivetrain entact for an extended period of time.

As far as the good tuners finding hidden torque management files.....well most tuners, good or bad, will either alter or delete torque management. Of course this will also shrink the life span of your drivetrain while adding noticable performance.