Well, he flew well known tuner Steve Kan down to tune the car & Steve did an awesome job. Due to lack of traction on the dyno with those shitty RE050 Potenzas, Steve tuned the car to a conservative 601whp @ 20lbs & 729whp @ 24lbs.
Peter Laquis 20B RX7 Tuned By Steve Kan - YouTube
One of a few other cars that Steve tuned while he was there....Aaron Dowridge GTR 32 Nissan Skyline - YouTube