Thanks for reading and for the kind words, Zack. You're correct--the C8.R had to be changed to compete in IMSA as part of a waiver it has since it does not meet GT3 regs. At least one (air inlet change) affected engine performance, but as far as I know all were made a few years ago, so nothing really new. Pretty sure it's running a muffler too--one big difference between it and the G56 (which I confirmed is not running one of the mufflers NASCAR has recently adopted for some tracks). Maybe someone else with more engineering knowledge than me (a low bar!) will weigh in.
Thanks for reading and for the kind words, Zack. You're correct--the C8.R had to be changed to compete in IMSA as part of a waiver it has since it does not meet GT3 regs. At least one (air inlet change) affected engine performance, but as far as I know all were made a few years ago, so nothing really new. Pretty sure it's running a muffler too--one big difference between it and the G56 (which I confirmed is not running one of the mufflers NASCAR has recently adopted for some tracks). Maybe someone else with more engineering knowledge than me (a low bar!) will weigh in.