To be honest I'm really not sure. I'm mostly basing this on the following (although I do know that mods are not purely additive and hence this is more of an educated guess):
- GRP 3rd cat delete (+5-10 bhp?)
- Milltek Valve Controller (in full open we've seen a few HP gain in some dyno testing)
- Eventuri Intake (+15-20 bhp)
- JB4 Map2 (We have 93 octane everywhere in NC) (+96 bhp)
So going for a conservative estimate, let's say we get 5 bhp for the 3rd cat, 5bhp for the Milltek in full open, 15bhp for the Eventuri, and round down to 90bhp for the JB4, we're still at +115bhp which would be 515bhp and right at 453.2hp to the wheels with an assumed drivetrain loss of 12%.
Also, for what it's worth, the JB4 V6 dyno runs with a drop in air filter and 3rd cat delete (I think?) showed 462hp to the wheels so I am probably lowballing the numbers.
Ref:
https://www.gregsraceparts.com/products/burger-tuning-jb4-tuner-for-2022-lotus-emira-beta
Anyone can feel free to correct me on any of this. I'm trying to base this analysis off of past dyno runs and data that have been made publicly available.