I have a pair of custom TRs
1 is a straman 512M
The other is a 92 512TR race car. She has a Koenig body, weighs 2800, stock engine w Motech ignition and 505 hp on 110 octane, Bob Wallace race trans, fuel cell, penske shocks, full cage, F50 brakes, slicks, and stax instruments
I have a spare engine that I will be rebuilding to make 600 hp then I want to redo the body and some other bits in carbon fiber and see if I can drop the weight down to 2700
She does 0:58s at Lime Rock and 2:10 at Watkins Glen