Doug, it's all in the tuning. GM (and the other manufacturers) build extra horses into their programs by basically crippling your vehicle by limiting output. That way, they don't have to retool the assembly line to produce more powerful engines: They simply adjust the tuning for 10 or 15 extra horses each year.Pushrods4ever said:Anyone know where they found the 10 extra horses's in the '06's over the '05's?
Perhaps tuning?, that we all could do to our '05's that isn't major engine surgury?
Why would you assume the 400 HP is due to differences in drivetrain losses? This is easily obtainable through software tuning. We routinely generate 35-40 HP gains over stock on 5.3/6.0L engines, so there's no reason to believe GM could not do the same. Have you ever wondered how the same model truck gets 5-10 HP gains year after year?cleavermodels said:Ok, so if I understand correctly, the LS2 6.0 engine in my '05 automatic has the same HP as the '06 automatic when at the same 6000rpm level? i.e. 395HP? I assume the 400HP that Chevy is marketing for the '06 six-speed is due to less power train parasitic drain with the manual vs. automatic transmission? Also, what is the little rectangular emblem on the lower corner to the rear of the front fender on each side of the '06? Is it a little bowtie? Cleavermodels
I use the same GM software (SPS) that the GM techs use to flash a PCM; the only difference is that I do not use a Tech 2 as does a GM tech. I can assure you there are no provisions for determing "checksums" or any other modifications. What the Tech 2 sees is simply the versions of the installed firmware. Since our tunes are pre-loaded with the latest GM firmware, a GM tech armed with a Tech 2 cannot detect a custom-programmed PCM; the PCM appears completely stock.mikem-2005 said:Brian,
Slightly off topic question for you....
After reprogramming the computer, whether complex Like what you did with Jim G's or as simple as a reprogram of the cooling fan set points, how does the software present itself to the "standard" GM hookup when interrogated? I had it suggested to me that the GM software connection will return with "rogue program load" to the GM service technician.
If a GM tech had reason to believe you were running a modified PCM (and the only way this would happen is if you let it slip), the only thing they could require you do to is to return the vehicle to stock condition before they perform warranty work. But they'd have no way of proving that you weren't running a stock tune, and they certainly aren't going to spend time grilling you about it.I'm interested in doing some on my '05, but am a little leery of the subsequent possible warranty issues with the computer. Your comments?
I'm sorry, I obviously misunderstood your original question.cleavermodels said:Just one last clarification....'05 automatic at 6000 rpm will have 395HP just like the '06? This is without chip modification, etc.? I'm just wanting an answer to a question. I'm not wanting to be sold on any after market changes. Thanks! Cleavermodels