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2019 IMSA WeatherTech Sports Car Championship Season Discussion

Old 01-10-2019, 11:33 PM
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Acura Reveals Retro Liveries for Penske DPis



Pretty cool throwbacks look for Team Penske



Ford unveils historic Rolex 24 GT liveries


Ford Performance and Chip Ganassi Racing will reach back to IMSA’s fabled 1980s era with the No. 66 GT, and pay homage to sponsor Castrol with the No. 67 GT for the upcoming Rolex 24 At Daytona.







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Old 01-11-2019, 09:26 PM
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Pretty serendipitous for the LMP2 body to have the rear fender match the swoop with the old Acura livery.

As iconic as the Renown Charge livery is, I'd like Mazda to bring back the blue and white. It'd make a nice change from all the red and black already out on the track.
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Old 01-14-2019, 12:43 PM
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IMSA teams still waiting on Balance-of-Performance rulings ahead of Rolex 24 at Daytona

Mazda was 1-2 on the speed chart at recent Roar Before the Rolex 24



“We trust the system,” said Mazda race director John Doonan, when Autoweek asked him about whether he was worried about getting penalized after both his Mazda Prototypes were the fastest two cars at the recent Roar Before the Rolex 24, the mandatory test that precedes the Rolex 24 at Daytona the last weekend in January.

It is unclear whether a mildly revised Balance of Performance system that is now being used by the IMSA sanctioning body will make the manufacturers trust the system more or less. IMSA hopes more.

Balance of Performance, or BoP, slows down or speeds up manufacturers’ cars -- all of them, not just individual teams -- by adding or subtracting weight, or downforce, or refueling times or capacities, or other methods when IMSA determines that the playing field needs leveling. That’s why some manufacturers are wary of showing all their cards before the actual race.
Data supplied by the carmakers themselves, in conjunction with data generated by IMSA, will determine whether a car needs BoP-ing, with a maximum adjustment of 20 kg, and adding or subtracting 3 percent of its power.

This year, testing, and not the final races of 2017, will form the basis for BoP changes for Daytona alone.

The end result, however, will be the same: slower cars will be sped up, and faster cars slowed down, so long as IMSA determines that the data being used are genuine, and not artificial.

BoP is needed in IMSA because the cars are not essentially all the same as they are in NASCAR or IndyCar. The Mazdas, for instance, use small turbocharged four-cylinders, while the Cadillac Prototypes are naturally aspirated V-8s.
I'm really hoping that Mazda doesn't get completely destroyed with the incoming BoP changes. I get that they were fast but IMSA also has to know teams don't show all their hands at the Roar so just let them race.
If anything, maybe a fuel window adjustment but if they add weight or drop the boost / RPM that could be troublesome, especially in such a long race.

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Old 01-16-2019, 09:46 PM
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great news!IMSA releases Rolex BoP changes




IMSA has revealed a significant surprise with its Balance of Performance adjustments for the WeatherTech SportsCar Championship field ahead of next week’s Rolex 24 At Daytona. In DPi, LMP2, and GT Le Mans, no meaningful changes have been made.

Barring minor fuel capacity alterations to align stint lengths for the DPi Acuras, Cadillacs, Mazdas, and the lone Nissan, IMSA chose to leave horsepower output, minimum weight, and the rest of its BoP manipulation options alone following the January 4-6 Roar Before The 24 test at Daytona.

The lack of change to the DPi class suggests IMSA felt slowing down the Roar-leading Mazdas, or elevating the pace of the other brands was not required based on testing data it captured throughout the event. The same is true for GTLM.

GT Daytona is the only category where BoP changes, other than fuel capacity, were made to multiple models.

On the topic of adding or removing performance for the sake adjusting the lap time gaps among the classes, DPi, LMP2, GTLM, and GT Daytona have been left untouched.
DPi BoP Changes
  • Acura ARX-05: Reduction of fuel capacity by of two liters, now 76L.
  • Cadillac DPi-V.R: Reduction of fuel capacity by one liter, now 70L.
  • Mazda RT24-P: Reduction of fuel capacity by two liters, now 79L. Clarification on rear wing angle allowance for the race that is no different from what was used at the Roar.
  • Nissan Onroak DPi: No changes.
GTLM BoP Changes
BMW M8 GTE: Increase of fuel capacity by two liters, now 90L.

GTD BoP Changes
  • Acura NSX GT3: Reduction of fuel capacity by three liters, now 105L.
  • BMW M6 GT3: Reduction of weight by 15 kilos, now 1290KG.
  • Lamborghini Huracan GT3: Increase in air restrictor flow to engine by one millimeter, now 39.0mm. Increase of fuel capacity by two liters, now 97L.
  • Porsche 911 GT3 R: Increase of fuel capacity by three liters, now 93L.

Given there's hardly any changes to the DPi class (and more importantly, Mazda) I think there's a LEGIT chance of seeing the all time lap record broken at Daytona this year. Obviously in a 24 hour race, it's going to come down to reliability but these cars have the speed to do something special and I for one am glad to see IMSA not tweaking the cars too much. Should make for a fun race!
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