While the next official TUDOR United SportsCar Championship test will be the Roar Before the Rolex 24 on Jan. 3-5, several teams will be participating in private sessions as follow up to the November tests at Sebring International Raceway and Daytona International Speedway.

The Michael Shank Racing and Chip Ganassi Racing with Felix Sabates transporters were lined up side-by-side in the Daytona International Speedway paddock on Tuesday and Wednesday, and there was plenty of interaction between the two teams throughout the session.

"It's called One Ford, and we're both here learning together," said Shank, who will join the Ganassi operation in running the Ford EcoBoost powerplant. "We had problems on Tuesday, so we learned from them. Then when they had trouble on Wednesday morning, they learned from us."

Ozz Negri – who won the 2012 Rolex 24 for Shank – drove the No. 60 Ford EcoBoost/Riley.

"It was a very productive test," Shank said. "We were able to get through a lot of items we needed to fix for next month. The car ran great, and the team was hitting on all cylinders. This test set the precedent for the race."

Scott Dixon did the bulk of the driving in the No. 01 Telcel/Target Ford EcoBoost/Riley, briefly joined on Tuesday by 2014 NASCAR Sprint Cup Series rookie Kyle Larson.

"We've had a few small issues, but as a turn-key package, I think it's been pretty good," Dixon said of the Ganassi car, which switched from BMW to Ford for 2014. "I've been running here in the past with a normally aspirated engine, so coming back with the turbo is a big change. I'll miss the January test due to other commitments, so this worked pretty decent to get a couple days here before next month's race."

Running in a sports car for the first time, Larson was able to get within seven-tenths of a second off Dixon's best lap on Tuesday.

"My whole background up until the last couple of years has been dirt track racing, and then I've been racing NASCAR," Larson said. "This is a lot different from what I'm used to driving. Everything's different – suspension, gear box, steering, brakes, throttle. The first couple of laps when I went out, nobody was in front of me, and it was difficult to figure out where to brake and stuff. Then somebody passed me, and I followed him and I picked up two seconds in just one lap."

"He's very talented," Dixon said of Larson. "Hopefully, he will be on the lineup. It will be exciting for him. I know he has a lot going on moving to Sprint Cup, but if he is running, he will be a pleasure to work with."

Sharing the track with the Shank and Ganassi teams were a pair of SRT Vipers – an SRT Motorsports GTS-R for the GTLM class driven by Marc Goossens and Kuno Wittmer, and a Riley Motorsports GT3-R for the GTD class driven by Ben Keating and Jeroen Bleekemolen.

It will be the first Rolex 24 for SRT Motorsports, which ran fulltime in the ALMS for the first time in 2013, winning at Road America. Viper has its niche in the Rolex 24 history book, winning overall in 2000 for the French Team Oreca.

"This is a new race for us, but we still have time to prepare for it," Goossens said. "We were here a couple of weeks ago, and now here we are again. We're also continuing to do our sim work and wind tunnel stuff. We're trying to prepare to the maximum, and see what the new championship brings. It's going to be an interesting race with so many cars on the grid."

SpeedSource brought a pair of the new Mazda SDR-14s that will debut at the Rolex 24. After debuting the Mazda SKYACTIV-D diesel powerplant in the Rolex Series GX class in 2013, Sylvain Tremblay's team is making the move to the Prototype class.

"This program is a big mountain to climb at Daytona," Tremblay said. "This is not what the car was designed for, and we have to adapt to it. There are a lot of unknowns. This engine package was proven in GX (nine victories and nine poles), now we are asking it to do more in an LMP2 car. It will be interesting. The Prototype class is filled with all of the regular players, plus. I can't wait to get back here in January and see what's going to happen on Sunday afternoon (Jan. 26)."