I edited the 291 to make a healthy 500 ft/lbs of torque at 5500 rpm and it accelerates fast but smooth. I went back to make a separate edit file for a high revving engine and everything is ignored. I wanted a 9000 rpm/700 ft/lb screamer but the tach still turns red a little after 5000 rpm and the hp/tq levels on the dyno app stay the same as they were with my other file. I changed max rpm, edited the transmission a little and all that worked fine the first time. I know I'm probably missing something. The only thing I haven't tried yet is going back and deleting everything I added up to the original number of rpm/torque labels and just editing the rpm in the original ones.
After some sleep it was an easy fix, the garage wasn't saving my rev limiter adjustments, I just needed to select live updates.
