Quote:
Originally Posted by ZLRob
Ah right, I was assuming you were talking about some sort of enable/ disable area of TM within the TCM tune which you could manually change, but all this other stuff... I believe all of my stuff is actually fairly close to factory levels minus the driver demand stuff. If you lived close to me I would totally take you for a spin so you can see how the set up performs, it definitely runs great and is very controlled by my right foot. I definitely have no external factors (the tune itself) influencing how the car drives and behaves by giving false engagements pre or post pedal control.
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I would just leave it then. If we are talking about the same thing, if you were to change that single table near WOT and above, closer to stock, it would bring some TM back in, and help soften the shifts. My stock calibration allows as much as -10 to -12* spark advance near-to-and-at-WOT redline (yours could be the same or close but sometimes GM's engineers make little changes. Anyways - as timing goes negative, the more TM can come in at shifts and soften them. As timing goes up, so does the torque, so the shifts have less TM and get more aggressive. I was running as much as 9* in these areas and on street tires, it was... aggressive. I pulled it back more, and it's better, but aggressive, lol.
There ARE shift-related tables in the TCM, and I don't remember seeing if you or JRE tuned it, but quickening shifts could require more line pressure to keep clutches from slipping, and just adding line pressure could make shifts harder without much benefit. You could change GENERAL LINE PRESSURES but I'd be cautious of clutch slip, too.
King' could definitely set me straight on m,y thoughts, and point you in a good direction. IMO, though, I'd compare what your MINIMUM SPARK is in those areas. If they are not in the negatives, (like I believe they would be in a stock tune table), someone has changed them (probably higher). If that's the case, and let's just say you see values of 5* in those cells, I'd think about pulling a few degrees out of those cells, and see if it's more to your liking. I think this method would be the safest way all-around, because it would only be adding TM back in, again - assuming it has been increased.
JMVHO