Originally Posted by M3_WC
Not according to the ALMS rules book, section 5.5 (page 201). Turbo/Supercharged engines are allowed.
So BMW doesn't have an excuse. They want to go to an all FI lineup in the showrooms, then have some balls and run it at the track now.
Other brands should take advantage of all the waivers BMW got. Benz should convert their SLS GT3 over to GTE spec.
The stock engine does not have a direct linkage to the fuel supply secondary to the direct injection and turbo systems which would not be allowed with the rules, and dual scrolls (basic explanation) are out and the valvetronic system would need to remain stock... The situation is complicated and is why there is no way BMW could enter a turbo under the current rules (why Porsche doesn't etc.) these rules will be altered by ACO/ALMS moving forward as someone involved with it all explained to me. I'd take these rules with a grain of salt
Corvette and Viper's also have waivers so lets not just say BMW does.