IIRC, Brayden has gone north of 5000rpms with JNeal's truck???
I also seem to recall that Ric Scrimmager has claimed to go north of 5000rpm as well.
Deal is, the LBZ ECM is CAPABLE of doing it and is the same type of ECM as that used in the stand alone controllers. Obviously, both trucks above are LBZs.
I'm gonna try and pull in the range of 4500-5000rpms. I'm affraid I won't be able to do that until I make a charger change though. Just don't think the stocker will like those RPMs and I know the drive pressure will be astronomical.
I take it you are looking into this for your drag truck build???
I'll tell you one person that may know something is a well known name in truck pulling. Chris Watson. I'm not sure if he's p-pumping or sigma pumping his Duramax but he's building a mod class duramax pulling truck and you can bet he'll be north of 5000rpms.
C-ya