RX7-787 is a beast! Racing Hards, 700PP, very quiclkly tuned up a ride to get 1:52:05 on Full Course Watkins Glen and a WIN in the WTC800(Normal Mode). 2nd place 9 seconds behind. stage 4 weight reduction, 473HP/310.4trq, 2587 weight, 50:50 dist, 6/27/30 diff settings. custom trans. can do 102mph thru the buss stop.
after some time trials action can do 1:50s on RHs and 1:46s on RS's with some subtle changes. 1:45s doable with more consistent lines and braking points. stupid fast compared to my swapped 03' M3 that is 4+ seconds off and can't use but 430hp of it's 53x effectively and I've tried many different tricks to make the rear stick. The RX7 can obtain a lot more aero so it makes sense.
ref My best lap in a Mazda GR3. vision GT3 is 1:45.33 on Racing Softs in a Sport mode qualifying lobby. This swapped car is stupid close to GR.3 cars but a little harder to drive fast. I have a 1:44 in the GR3 car but wont count it bc it would have included a 0.5s penalty.