It is infuriating to me that dsdownloader auto updates the Trinity. It should not do that.

Good news there.

Anytime your car goes to the dealer. You never know if they will decide to update the PCM without telling you.

You can do all that data logging without an SD card.

How do you like that Superbee?

Oh, "last tune written", got it thanks.

Mike, what is LTW?

He will suggest the exact same thing.

Run the 93 tune with your 98 octane, add 5% fuel across the rpm range, log again and see if you get knock. If you get knock, try adding a little more fuel, or try the 91 octane tune with 5% fuel. Keep logging, see if you can get rid of the knock with added fuel. If you can't, try a different brand ...

Yah, you're getting some knock. That's going to hurt performance. Have you tried adding 5% fuel?

You need to include the Short Term and Long Term Knock Retard PIDs when you log.

Yes, that's ok, too.

You can definitely have knock and not hear it, in fact if you heard it that would be bad. Problem here is that if it is getting STKR or LTKR, i.e. it is pulling timing for knock, then you are LOSING performance.

Bottom line, you should do some logging, you have the tool to do it.

I would throw on ...

You do not have to restore the original tune.

Conti DWS.