AO: VdrSain was referring to the Super Speedway Enduro, I believe, not the original question of the Trial Mountain enduro.
VdrSain: First and foremost, welcome to GTP! For the Speedway Enduro, I ran the ZZII on T2s, which turned in consistent 34"-35" laps. With too many pit stops I averaged 38"/lap... and crushed the competition. Over 100 laps I finished 9 laps ahead of the Motorsport Elise. It averaged (including pit stops) about 42"/lap. Doing some mental math, you could add 10% to my lap time and be in the running against that car. Meaning that individual lap times of 39" or so, and a pit strategy of about every 15 laps (use T2s), would win it for you with out being a blowout.
Good luck! And I suggest a look around on the Writeups board. Set your view prefernces to "View All" or at least "Past 120 Days" because that board doesn't get as much traffic. There's an awful lot of detailed information there to be found.