On those production car lap times-

Bet none of those production cars with faster lap times than you come with "true street tires" like your 200utqg RS-3. They probably come with DOT-Rs like Pilot Sport Cups and Trofeo Rs.

Imagine how fast you would be on 295 DOT-Rs all around!

 

This is really cool build. Its good to see something so thorough and focused. Hits the sweet spot of a balanced streetable track car. Are you going any further with a half roll cage or something?

 

87FCturboII, I wonder if you have looked into your datalog to confirm that the mass flow curve prediction on the compressor map is close enough? Cheers.