[Anthony235]

I've owned and tracked a S2000 as well.

As for your GT3 question....anything is possible if you throw enough time and money at it. How realistic is it for a modded m235i to compete against a stock 991 GT3 on a road course? Not very.

You would basically have to build a copy of the M235i Racing car and then add ~200hp reliably. Adding the power can be done relatively easy. The hard part is to make that power for 30+ minute track sessions. Chassis can handle 500hp in my opinion.

Rough estimate is ~$20k for parts. Then add any labor.

Honestly your s2k with ~$20k in parts will be a faster road course car then the modded m235i. Just model the s2k after the Evasive car. The BMW as a daily and the s2k as the track car is perfect in my opinion. Most fun car I've owned is the s2k.

I see you're in Socal. I only tracked the s2k at SOW, but I've done big willow in the m235. I think my s2k would be faster than the BMW at SOW.

1:23.xx in s2k at SOW (NT01 and Megan coils)
1:33.xx in BMW at Big Willow. (RE71 and KW Clubsports).

For comparison:
1:32.5 F80 M3 with Randy Pobst at Big Willow
1:24.6 991 GT3 with Randy Pobst at Big Willow