Lotus’ Chester explains team’s prep plans for Renault to Mercedes switch

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Things haven’t come easy for Lotus in 2014, but as witnessed by Williams this season, a change in power unit could be a big key to a one-year turnaround the following season.

Such is the hope for the Enstone-based squad, which will swap Renault for Mercedes power next season. Team technical director Nick Chester outlined the development plan in a Q&A on the team’s website.

While the 2014 car started more than two years out given all the new systems coming into play this year, Chester said the 2015 car is on a more conventional timeline, with plans for the car having begun in January. He also expects the nose, engine cover and rear wing to look quite different; the team experimented with a new nose during the United States Grand Prix weekend in Austin’s free practice one.

And then there’s the power unit. The all-conquering Mercedes this year has been the measure of the field and while McLaren moves on to Honda next year, that opens up a slot which Lotus has taken with open arms. Chester described the changes that will come with the packaging to accommodate the Mercedes in the back end.

“There are a number of differences that we need to take into account like the packaging, the heat rejections, and the cooling requirements,” Chester said. “At the same time, had we continued with Renault Sport F1, there would also have been modifications in the package for 2015. My feeling is that it won’t represent significantly more work. It is more a matter of adapting to a new type of packaging and different requirements.

“In some ways, it will be relatively painless as Mercedes are quite fixed about what they need for their power unit installation. It means that there won’t be too many iterations, at least less than when the V6 was introduced last year. It is a more defined program.”

The hope is that Lotus can recapture the form that made it a podium regular and occasional race winner the last couple years in 2015. Likely to come eighth in this year’s Constructor’s Championship, there’s nowhere to go but up.

Cadillac, Acura battle for top speed as cars back on track for Rolex 24 at Daytona practice

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DAYTONA BEACH, Fla. – The new hybrid prototypes of Cadillac and Acura battled atop the speed chart as practice resumed Thursday for the Rolex 24 at Daytona.

Chip Ganassi Racing driver Richard Westbrook was fastest Thursday afternoon in the No. 02 Cadillac V-LMDh with a 1-minute, 35.185-second lap around the 12-turn, 3.56-mile road course at Daytona International Speedway.

That pace topped Ricky Taylor’s 1:35.366 lap that topped the Thursday morning session that marked the first time the IMSA WeatherTech SportsCar Championship was back on track since qualifying Sunday afternoon that concluded the four-day Roar Before The Rolex 24 test.

In a final session Thursday night, Matt Campbell was fastest (1:35.802) in the No. 7 Porsche Penske Motorsports Porsche 963 but still was off the times set by Westbrook and Taylor.

Punctuated by Tom Blomqvist’s pole position for defending race winner Meyer Shank Racing, the Acura ARX-06s had been fastest for much of the Roar and led four consecutive practice sessions.

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But the times have been extremely tight in the new Grand Touring Prototype (GTP) category that has brought hybrid engines to IMSA’s premier class. Only 0.9 seconds separated the nine LMDh cars in GTP in qualifying, and though the spread slightly widened to 1.378 seconds in Thursday’s practices with teams on varying strategies and preparation, Westbrook still pooh-poohed the importance of speeds.

“It’s always nice to be at the top, but I don’t think it means too much or read too much into it” Westbrook said. “Big fuel tanks in the GTP class this year, so you have no idea what fuel levels people are running. We had a good run, and the car is really enjoyable to drive now. I definitely wasn’t saying that a month ago.

“It really does feel good now. We are working on performance and definitely unlocking some potential, and it just gives us more confidence going into the race. It’s going to be super tight. Everyone’s got the same power, everyone has the same downforce, everyone has the same drag levels and let’s just go race.”

Because teams have put such a premium on reliability, handling mostly has suffered in the GTPs, but Westbrook said the tide had turned Thursday.

“These cars are so competitive, and you were just running it for the sake of running it in the beginning, and there’s so much going on, you don’t really have time to work on performance,” he said. “A lot of emphasis was on durability in the beginning, and rightly so, but now finally we can work on performance, and that’s the same for other manufacturers as well. But we’re worrying about ourselves and improving every run, and I think everybody’s pretty happy with their Cadillac right now.”

Mike Shank, co-owner of Blomqvist’s No. 60 on the pole, said his team still was facing reliability problems despite its speed.

“We address them literally every hour,” Shank said. “We’re addressing some little thing we’re doing better to try to make it last. And also we’re talking about how we race the race, which will be different from years past.

“Just think about every system in the car, I’m not going to say which ones we’re working on, but there are systems in the car that ORECA and HPD are continually trying to improve. By the way, sometimes we put them on the car and take them off before it even goes out on the track because something didn’t work with electronics. There’s so much programming. So many departments have to talk to each other. That bridge gets broken from a code not being totally correct, and the car won’t run. Or the power steering turns off.”

Former Rolex 24 winner Renger van der Zande of Ganassi said it still is a waiting game until the 24-hour race begins Saturday shortly after 1:30 p.m.

“I think the performance of the car is good,” van der Zande said. “No drama. We’re chipping away on setup step by step and the team is in control. It’s crazy out there what people do on the track at the moment. It’s about staying cool and peak at the right moment, and it’s not the right moment yet for that. We’ll keep digging.”


PRACTICE RESULTS:

Click here for Session I (by class)

Click here for Session II (by class)

Click here for Session III (by class)

Combined speeds