Originally Posted by thunderlevin
The V6 isn't even breathing hard at 115. That's what's so frustrating. The limiter kicks in right in the middle of the power band.
The 4.0L engine itself may not be too strained (which isn't particularly correct either mind you) but the drivetrain and suspension are absolutely at their limits when you near speeds in excess of 115+ MPH.
At those speeds that two piece shaft will back out of its U-Joints and start oscillating so fast that you won't know what hit you when it finally does snap. Or just as worse, your **** poor stock OEM tires (probably the cheapo ones that came with base 4.0s) rated for less than 120MPH fail. Either way, you are causing a death wish to come true due to blissful ignorance.
As far as answering your "question", I do not know of any programs that will unlock your PCM and allow you to make changes on the fly through your computer (do you have a USB to OBDII connector?). As far as I know, most garage tuners still use their SCT tuners to upload their files into their vehicles.
I don't even want to ask if you have a roll bar for your convertible when you are doing these speeds...