The cars only mods are a 3.91gear 93 octane tune and a oil catch can and drag radials i was running 93 gas might try better fuel next time. The car has 106,000 miles. I did raise the shift points and turned off MDS.Torque management is applied at shift points to mitigate wear and tear on the drive train from excessive torque in between gears. One way it does that is to reduce throttle.
As fun as scratches are at gear shifts, they are viewed as detrimental to the longevity of the drivetrain components and thus actively negates with Torque Management.
The KR in that datalog is probably not false, but it’s hard to tell from just one log. To really get a feel for its source, record several WOT runs under similar conditions and look for repeated KR spikes in the same RPM ranges, excluding shift points.
A normal false knock event will begin with a spike and ladder step down. Real knock with tend to either increase or stay steady over time. Your looks closer to the latter, but more WOT runs graphed in a log or logs would make it easier to help classify.
Also, what is the engine, engine mods, miles, tune, tune mods, and gasoline octane being shown in the log file?
The cars only mods are a 3.91gear 93 octane tune and a oil catch can and drag radials i was running 93 gas might try better fuel next time. The car has 106,000 miles. I did raise the shift points and turned off MDS.
No cai stock airbox with a K&N. The car is running pretty good on this pass it wentYeah, that 3.91 behind a NAG1 trans and 6.1L engine means there is an unholy amount of torque that the drivetrain and suspension has to try to keep under control while you are at full throttle, and the 93 canned tune will have the least amount of torque management applied to try to do it. It will also have the most sensitive knock sensor settings, so any errant noise in the suspension or exhaust may be picked up and mistaken for knock.
Having said that, yours is not too bad. 2.5 degrees for the maximum STKR seen in the log is pretty good for that setup. Excluding the shifts, I only see two spots where I would think real knock occurred and could be addressed, but even then I wouldn't do anything without more logs showing repeated knock in the same spots.
Are you running the stock air intake for the engine or an aftermarket CAI? If aftermarket CAI, you can add a little fuel to mid and upper RPM range to see if that does anything to the KR, but run more logs first to make sure it recurs before making any changes. If the KR is intermittent and not predictable, changing the WOT Fuel wont have an effect on it. View attachment 1034356
Also, you might try out the 91 tune and see what it does under the same conditions (93 octane, ambient air temp, etc). You might find the car likes it better.
Sometime the quality of the 93 octane you find is a little low, leaving it a little short of the requirements the 93 tune has for fuel. And if the PCM pulls enough timing in the 93 tune (due to knock from poor quality 93 gas) to basically equal the 91 tune, why not run the 91 tune instead?
The 91 tune has more torque management (which your 3.91 rear-end can benefit from) and less sensitive knock sensors, which can all translate into a slightly better tune to run in some cases.
Try it out on your car and see; couldn’t hurt, right?
Yeah, I would just keep recording datalogs and watching for anything out of the ordinary. 2.5 degrees of KR isn’t much for the max seen in a run. Worst case scenario is that’d only put you about 5-6 HP down at that point anyway.
Nuke im running a 6.4 .
Yeah I realized that and changed my earlier post. While that is good for the driver experience, that’s even worse for the car.Nuke im running a 6.4 .
Glad to be of service! 😁Thanks Nuke it seems you have helped a lot of people here and are definitely helping me.