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Extensive Changes to Le Mans GTE-Pro BoP

Five of six GTE-Pro cars adjusted in Le Mans Balance of Performance changes…

Photo: John Dagys

The FIA and ACO have confirmed Balance of Performance changes to five of the six manufacturers in the GTE-Pro class ahead of this weekend’s 24 Hours of Le Mans.

Three manufacturers have been handed weight adjustments, while there are boost ratio changes across the board for the quartet of turbocharged cars.

The new-generation Aston Martin Vantage GTEs that ran almost five seconds off the pace at the Test Day have been granted a boost increase, with smaller increases given to the BMW M8 GTE and Ferrari 488 GTE.

The Ford GT faces a minor boost reduction but countered with a 13kg weight break, compared to a 13kg weight increase for the BMW.

Chevrolet’s Corvette C7.R, meanwhile, will be 10kg heavier at the start of Free Practice on Wednesday, although Sportscar365 understands that this number has been offset by the team running heavier cars at the test.

Fuel capacity adjustments have been made to the Aston Martin (+4 liters), BMW (-4 liters) and Ford (-2 liters) but the maximum stint length of 14 laps for all GTE-Pro cars still applies.

The fastest car from the pre-event test, the Porsche 911 RSR, has not been handed any changes.

The only BoP change in the GTE-Am category is a 2-liter fuel increase for the previous-generation Aston Martin Vantage GTE.

While extensive changes have already been made, the FIA and ACO reserve the right for additional adjustments throughout the race week, leading up to Saturday’s race start.

Post-qualifying BoP changes occurred in the last two years.

Daniel Lloyd is a UK-based reporter for Sportscar365 and e-racing365, with a focus on the FIA World Endurance Championship and various electric racing series.

39 Comments

39 Comments

  1. Glenn Smith

    June 12, 2018 at 10:18 am

    And the fastest car isn’t even touched. The surprising one is the weight addition on the Vettes.

    • Brandon

      June 12, 2018 at 10:30 am

      Maybe Porsche ran close to full tilt and the FIA was happy with where they were? Seems pretty reasonable if that’s the case. 53s is close to race pace last year iirc.

      • Jake

        June 12, 2018 at 11:33 am

        They didnt run 53’s they ran 52 flat.

    • gmfansaredelusional

      June 12, 2018 at 8:26 pm

      And Glenn, with the weight, the ‘vette with its 5.5 liter engine is still 5kg lighter than the 4.0 liter Porsche. Waaaaaaaaaaaaaaaahhhhhhhhhh.

      And the Porsche only has .8 mm larger restrictor and the lamda is only .01 richer for the Porsche.

      And before some declared “expert” runs his mouth, yes it’s exactly how BOP works.

      GM fans sure love to whine.

      • Tom

        June 13, 2018 at 10:08 am

        Sounds a lot like the pot calling the kettle black… Please grow up when addressing people and their opinions. Unless you’re 13, then we understand why you have complain and whine about other people.

      • OldManC6

        June 16, 2018 at 11:37 pm

        Irrelevant considering the vettes are running the least amount of boost on an engine smaller then the ones in their base production models.Let them run at their production displacements like everyone else.

  2. David Chaste

    June 12, 2018 at 10:22 am

    How does this happen? The IMSA guys bop shuffle makes a lot more sense. We can only wait and see, about the results during practice.

    • ?

      June 12, 2018 at 11:48 am

      Yeah, sure. IMSA’s BoP acts more like a success ballast than actual BoP.

  3. The Esses

    June 12, 2018 at 11:23 am

    Wow i though BoP made me angry until I heard about maximum stint length… to me this goes way to far. Idk if this has been in the rules for a while or what but to me you should have your regulations and its ok if thats *intended* to box teams into a window in terms of stint length but then let them play and make that extra lap if they can. There is no way a car with fuel in the tank and the life on the tires to make it around another time should be forced to pit. That is not Le Mans.

    • Paul

      June 12, 2018 at 11:56 am

      I hate that rule too, and if it’s there even bother juggling with tank sizes all the time?

      • Steve

        June 17, 2018 at 9:16 pm

        Yes I agree. Let’s have the ultimate endurance race then take endurance out of the equation. Beyond comprehension???

  4. Parker

    June 12, 2018 at 11:33 am

    BREAKING: Toyota may bypass the chicanes on the Mulsanne Straight in latest EOT adjustment

    • Andy

      June 12, 2018 at 11:46 am

      Ok now that was funny

    • TF110

      June 12, 2018 at 11:58 am

      And in the process ruin their race by running over cones. Sounds logical for the anti-Alonso crowd. /s

      • FlyingLobster27

        June 12, 2018 at 12:55 pm

        Fernando is faster than cones. Can you confirm you understood that message?

      • Parker

        June 12, 2018 at 1:30 pm

        I’m not anti-Alonso. Far from it. I want to see a driver win the triple crown of motorsport. I’d love to see Montoya get a shot at an overall Le Mans win along with Alonso. That would be a remarkable achievement in the era if specialization.

        I am strongly against having one set of rules for one competitor and another set of rules for another competitor in the same category.

      • toyotafanssuckasbadasgmfans

        June 12, 2018 at 8:29 pm

        How about a crowd that thinks rules favoritism sucks but you have been on this whining bandwagon about Turdyota for a long time.

        • Tom

          June 13, 2018 at 10:10 am

          The child returns…

    • Paul

      June 12, 2018 at 11:59 am

      And the stewards might dictate that privateers take the 17km track that was in use until 1932, if they are within 10 laps of the Toyotas halfway through the race.

  5. Zone

    June 12, 2018 at 11:40 am

    Audi is out and who’s next

  6. N8

    June 12, 2018 at 12:04 pm

    Remember when “Automatic BoP” was supposed to resolve all of this?

    • JEZ

      June 12, 2018 at 12:08 pm

      Automatic BoP doesn’t work for Le Mans, which is why it doesn’t exist. Low downforce/high speed track with nothing great to compare it to.

  7. Paul

    June 12, 2018 at 12:10 pm

    EoT and Toyota win now confirmed…

  8. Paul

    June 12, 2018 at 12:20 pm

    Anybody here know what difference those tiny +/-0,01 boost changes (M8/488/GT) or 0,04 (AM) means to hp?

    • edo

      June 12, 2018 at 2:40 pm

      Yes, from 4 to 9/10 hp

    • fourloko

      June 12, 2018 at 2:42 pm

      not sure about hp, but if we translate max boost of AM into effective atmospheric pressure you get about 2.47 ATM, then multiply by displacement (4L) and you get 9.8L. now after the boost change (.04 bar) you get 9.76L.

      for reference the ford at max boost is 2.42 ATM, but is only 8.46L

      • Kay

        June 12, 2018 at 4:56 pm

        fourloko, the atmospheric pressure times Bop boost ratio gives 1 x 1.5 = 1.5 for example. You added an extra 1. these cars make 520 hp not 800 LOL. Similar to GT2 cars from the past decade. The amazing laptimes are from tires and aero. Not top speed.

        • fourloko

          June 12, 2018 at 7:01 pm

          you essentially forgot to add in for gauge pressure. its (14.7 + boost)/14.7

          • fourloko

            June 12, 2018 at 8:53 pm

            correction* that’s for if you’re using PSI like normal people and not BAR

  9. NASCAR/DPs Suck

    June 12, 2018 at 1:28 pm

    Corvette with more weight-what? It’s Porsche’s or Ford’s race to lose almost to the same degree as LMP1 belongs to Toyota. I’ll watch and hope to be proven wrong.

    • Paul

      June 12, 2018 at 2:30 pm

      Me too, unless someones hiding something and the Boppers know something we dont, it’s very much Ford vs Porsche, 3 fords and 1 Porsche way ahead in number of fast laps during test day.

      • JEZ

        June 12, 2018 at 5:58 pm

        None of my replies with the comparisons to last year are making through (spam filter I guess), but if you ignore test day, the new BoP kind of aligns with the results from last year’s race and last year’s BoP. Corvette had second fastest race lap last year (behind Aston) and is now a little slower, while Ford is the same, Porsche a little faster, and with the Evo Kit, not sure about Ferrari.

        • Mike

          June 12, 2018 at 10:19 pm

          You are correct. I didn’t feel like typing it up either. I think ACO put Corvette, Ford, and Porsche in striking distance. Porsche look to be the “chosen one” for this year. Ferrari and Ford shafted after the 2016 incident….

          Vette – +10kg, no power change
          Ford – Identical to last year (-1kg)
          Porsche – +9kg, +0.2mm restrictor.
          Ferrari – +23 kg, +0.1 boost ratio across RPM range

          Vette’s were a little too quick last year. Porsche’s a little too slow. Fords a little too slow (so they are probably being shafted this year to be honest…)

          BMW, Aston outliers. However, BMW seem quietly confident.

  10. griffm3

    June 12, 2018 at 4:05 pm

    Porsche and Ford to go for the race win with their 4 cars…the rest shouldnt bother showing up.

    • Dave

      June 13, 2018 at 6:32 am

      Aston wasn’t ready, Chevy is not in the business of building C7Rs anymore. Ferrari and BMW though have cars out there that could be competing in factory supported fashion. You would think these two mfg.s would be seeking a Le Mans win with more earnest.

  11. fourloko

    June 12, 2018 at 7:03 pm

    will be interesting to see how the heavy bmw does double stinting tires. would think it would have heavier (front) tire wear

    • Mike

      June 12, 2018 at 8:18 pm

      BMW weighs 1280kg to the regulation. The Ferrari 488 weights 1291Kg to the regulation.
      These cars are capable of running under 1200kg. The BOP table defines their minimum weight. They are far removed from the road going counterparts.

      What was observed at Spa, is that the BMW has higher rear tire degradation. It may not be a problem here at Le Mans.

  12. Andrew Pyke

    June 12, 2018 at 9:04 pm

    Running 14 laps @ 3:53 will give teams a maximum 55 min stints. This is endurance.. I wish I could see these cars running longer or unrestricted stints, but it is what it is. Allowing such open technical regs has it’s drawbacks in the balancing act.

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