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Corvette Pegged Back in Post-Le Mans Test BoP Changes

Corvette C7.R given 0.2mm reduction in air restrictor for Le Mans…

Photo: John Dagys

The Corvette C7.R has been slowed ahead of the start of official on-track activity for the 24 Hours of Le Mans, with the FIA confirming Friday Balance of Performance changes in the wake of last weekend’s Le Mans Test Day.

The GTE-Pro class Corvettes, which paced the test day, will start Free Practice on Wednesday with a 0.2 mm smaller air restrictor, which roughly equates to a five to ten horsepower decrease.

It is the only notable change to the BoP in the class, with the weight and power configurations from the Ford GT, Porsche 911 RSR, Ferrari 488 GTE and Aston Martin Vantage remaining unchanged.

Fuel capacities, however, have been adjusted for all GTE-Pro cars, in order to equalize refueling times and stint lengths at 35 seconds and 14 laps, respectively.

As a result, both the Ferrari and Aston Martin gain 3 liters, with 2-liter increases for the Corvette and Ford and 1 liter of additional capacity for Porsche.

Fuel capacity adjustments have also been made in GTE-Am for the 2016-spec Ferrari and Aston Martin, which both receive 4 additional liters.

However, the GTE-Am class Ferrari also gains a 0.03 increase in turbo boost pressures, across all power levels.

As was the case last year, the FIA reserves the right to make additional BoP changes at any time during race week, in the run-up to the next weekend’s race.

John Dagys is the founder and Editor-in-Chief of Sportscar365 as well as the recently launched e-racing365 Web site for electric racing. Dagys spent eight years as a motorsports correspondent for Channel, and contributes to other publications worldwide. Contact John



  1. Raffaele Galiano

    June 10, 2017 at 12:10 pm

    Next step will be BoP changes at 6, 12 and 18 hours.

    • Corvette lover

      June 10, 2017 at 3:51 pm


  2. Bob

    June 10, 2017 at 12:21 pm

    Last year we also had post-qualifying adjustments, wouldn’t be surprised if this year not only that but also post- free practice, post- warm-up adjustments as well?

  3. Greg Hudson

    June 10, 2017 at 1:43 pm

    The magazine’s said the Ford GT has a 40+ pound addition among other things I can’t recall

  4. Eric

    June 10, 2017 at 2:08 pm

    Way are the so intent in reining in the Corvette? Sounds more like BS than BOP

    • Erin Robles

      June 12, 2017 at 1:26 am

      Sounds like sour grapes…I’m sure if the shoe were in the other foot for the other teams, you might not play the ‘BS’ card.

  5. Terry

    June 10, 2017 at 2:38 pm

    It’s their ball park, and they like the home boy’ (factory teams), it’s the same as the US and the way they made flat track racing for basically Harley Davison, because the riceburners were eating them up with a lot less CC’s.

  6. Jake

    June 10, 2017 at 3:11 pm

    Holy shit, the ACO does it again. Slow down the fastest car at the test, before anyone has shown their true hand. Do they not realize Ferrari ran the exact same bop as last year. Ran a 3:51 in qualifying, and yet this year ran a 3:55 in the test?

    • Biff McGee

      June 12, 2017 at 1:28 am

      Chill out.

      Your not making the call here, but you can play arm-chair engineer from several thousand miles away.

  7. Speedy

    June 10, 2017 at 3:16 pm

    Corvette racing even here in these us (imsa) are not the fastest car’s.

  8. amlv20

    June 10, 2017 at 3:29 pm

    haha ford got their wish

    • Wulf

      June 10, 2017 at 3:37 pm

      And some ACO official got an early Christmas…..

  9. Speedy

    June 10, 2017 at 3:38 pm

    If corvette were racing in these wec they would get the same treatment, it would make know different.

  10. Kameron Heath

    June 10, 2017 at 3:57 pm

    ….I heard a donkey passed one of the Ford GTs…do they will have to go to the back of,field….hmmmm.based on last year’s sham….they’ll find the front before dusk.

  11. JamieR

    June 10, 2017 at 4:27 pm

    So it begins….there will of course be plenty more changes. Making frequent adjustments only encourages teams to politic more and more.

    I do agree with the sentiment that Corvette suffer due to being in IMSA. Partly as the ACO have less data to go on and partly because it wouldn’t look good if they (or in some ways Risi) came and showed up the WEC teams.

  12. Speedy

    June 10, 2017 at 4:38 pm

    If these ACO had data on corvette racing, and if they were racing in these wec series it would be these same way as it is now. Corvette racing are not these fastest car’s in these IMSA series, and they wouldn’t be these fastest in a ACO/FIA run series either.

    • Michael Carlson

      June 10, 2017 at 4:54 pm

      You hate Harleys and Corvettes. Sound poor to me.

      • CD

        June 10, 2017 at 8:00 pm

        Michael depends on what you deem “not poor” I guess. Owning a Harley or Corvette doesn’t make one rich. Just typical American ignorance and arrogance I guess.

        • Kurt

          June 11, 2017 at 8:14 am

          Why do you have to insult all Americans because of one opinion? So you would be okay with me saying you’re response is a typical “Eurotrash” reaction? Some of us “ignorant and arrogant Americans” have traveled Europe extensively and love and respect the different cultures.

          • John

            June 11, 2017 at 12:47 pm

            I have been to Western Europe several times over the past 5 yrs, what a change, the so called culture has changed drastically, some areas of England, Spain, France and Germany reminded me more of Eastern Cairo then a modern Western City.

            This summer I will take my Family to Hungry,Romania, Slovakia, The Czech Republic and Poland. I feel safer taking them there, no open liberal multicultural crap there.

    • Robert Parson

      June 10, 2017 at 8:10 pm

      then explain how they allowed the GT’s performance last year?

  13. Vetteheadracer

    June 10, 2017 at 4:47 pm

    35 minutes not 35 second stints! Lol

    • Nate B

      June 11, 2017 at 9:46 am

      35 seconds refueling, 14 lap stints.

  14. Speedy

    June 10, 2017 at 5:09 pm

    What are you talking about, hate what??!!. I’m talking about it would make know different what series they ran, they would get same treatment. Now there are rumors of them running a factory race team in wec next year will see if that’s true or not.

  15. F1GTR

    June 10, 2017 at 5:19 pm

    Meanwhile Chip Ganassi will cackle maniacally as his Ecoboost(™) powered sand containers unload their precious cargo and start doing 3:50 laps.

    • el_gordo

      June 10, 2017 at 6:07 pm

      don’t you mean ACOboost

  16. jack

    June 10, 2017 at 5:31 pm

    according to porsche this was expected.

  17. Robert Parson

    June 10, 2017 at 8:09 pm

    so, how much is the ACO going to handicap the C7R this year in order to ensure a Ford GT win? Garbage like this is why fans are leaving the sport.

    • Andy Flinn

      June 10, 2017 at 11:48 pm

      Robert, how many times does Team Corvette need to win at Le Mans (eight) and Sebring (the last three-in-a-row) and Daytona (two of the last three) and how many championships does Team Corvette need to claim (2016 IMSA GTLM championship) before Corvette fans are willing to admit that the people who set BoP are not out to get them?

      The only thing worse than a sore loser is a sore winner.

      • Joel

        June 11, 2017 at 9:54 am

        In only a few of those wins was the Corvette team the fastest car. Other teams usually beat themselves or have mechanical issues. The Corvette Team is know as being the most prepared team in the GT class, like how Audi has that reputation in P1

        • Bert

          June 11, 2017 at 9:46 pm

          3-4 of the Vette wins at LeMans were in GT1…where they raced against themselves…

    • Robert Rietkerk

      June 11, 2017 at 11:09 am

      100% correct. I have quit going to the races and will not watch this year’s race. Ful them.

      • Bert

        June 11, 2017 at 10:29 pm

        The only way the Vettes win these days is getting overly favorable BOP….it’s an old obsolete car, look at the race last year when the other cars were mathematically eliminated from winning the IMSA title last year…which was at VIR…then the Vette was dialed back…the Vettes had nothing at Petite LeMans…or Daytona..

        • JamieR

          June 12, 2017 at 8:04 am

          Which model of Ford to you own?

          Last year the 67 Ford had a shot at the title at Petite Le Mans, but then remembered it was a Ford and broke down. IMSA BoP last year was as close to perfect as it is possible to get throughout the year, which is why there were several extremely close finishes.

          I also get annoyed by this “obsolete” complaint directed at any car that isn’t brand new. That is one of the reasons we have BoP, to keep costs down. I’m sure if when the new Aston and Corvette GTE cars come out in 2018/2019 people would be quick to scream if they had a speed advantage.

          • Bert

            June 12, 2017 at 9:06 am

            I wonder when the successor to the 488 will be launched…a 4.99ltr V-8?….Ferrari needs to homologate the Enzo or the LaFerrari for the 2018 LeMans….of wait, Ferrari already did that with the MC-12 and the other teams cried because it was too fast even though it had 75 pounds of added weight. I’d like to see the Ford GT/Ferrari-Maserati Enzo-MC12 run against each in a race between the two prototypes….ooops…I mean GT entries…what’s good for Ford is not allowed by another….oh wait, Porsche entered a car that isn’t available to customer teams…at least not until 2018….I’m confused…..again…🤔…

  18. Mike S.

    June 10, 2017 at 8:29 pm

    I don’t think this is drastic cut for a 24 hour race. Principal of it can be a bit concerning considering last year’s BoP circus. Like the last paragraph, “ACO has the right to make adjustments up until race day.” Factories get your bribe checks and lobby sticks out.

  19. Kenneth Billups

    June 10, 2017 at 9:00 pm

    Well here we go again. Corvette last year was robbed of being able to be competitive. The 24 Hours of LeMans gave that race to Ford

    • Andy Flinn

      June 10, 2017 at 11:57 pm

      Kenneth, so if Corvette doesn’t win at Le Mans they’re “robbed”?

      I suppose you don’t have a problem with Corvette winning Sebring the last three years in a row. Right?

      Ford and CGR again proved themselves worthy by winning the 2016 Rolex24 at Daytona. (Do you have a problem with that Ford win, too?). Then they lost Sebring to Corvette.

      Funny though, Kenneth. I don’t recall Ford, Chip or CGR going around WHINING about it.

      That’s called CLASS.

      • Bert

        June 12, 2017 at 9:17 am

        @Andy Flinn…..could you point to the time-when-where Ford showed this “class” you’re talking about?….was it last year when the waiver was being force-fed to the other GT-PRO teams?….was it during Free Practice when they were near the bottom of times?….was it during qualifying when they went far faster?….was it when the head of Ford GT Research & Development Raj Nair stood outside the Risi Competizione garage while it was leading the race snooping around looking for something to protest?….or was it when Ford went to Risi and said “let our GT’s go by your Ferrari and this protest goes away”…..I’m confused….when and where exactly was that class you’re talking about?….hmmm…missed that somewhere…

    • Robert Rietkerk

      June 11, 2017 at 11:10 am

      Agreed. Same old bullshit.

  20. TopCat501

    June 10, 2017 at 9:07 pm

    If your manufacturer of choice takes a BOP hit then the ACO is biased and crooked. Logic of a 12 year old. Whiney much?

    The only thing I can deduce from my couch is that the Ferrari, having suffered no BOP hits, will guaranteed be faster than the Fords since both return unchanged from last year and the Ferrari was within a hair of the Fords last year.

    Corvettes & Porsche will both be faster than last year. Faster than the Fords? Who knows yet. Qualifying should be a much better barometer of speed. And I would expect 1 or 2 BOP changes after that.

    • Robert Rietkerk

      June 11, 2017 at 11:12 am

      Agreed. Same old bullshit.

  21. Bert

    June 10, 2017 at 9:15 pm

    Even though Ford was given added weight and had their boost levels reduced, the GT’s will all be MIRACULOUSLY under 3:53, maybe under 3:52 and take GT-PRO pole…and will again have another level of performance down the Mulsanne, almost like they have DRS…

  22. Speedy

    June 10, 2017 at 9:33 pm

    Corvette racing has all ways been hit hard with bop’s then any other manufacture, even before there were bop’s, wec series, during these alms series, they were hit with smaller restrictor size’s. IMSA,ACO/FIA all do these same thing.

    • Granny, stop farting!

      June 10, 2017 at 11:45 pm

      Multi-Matic GT’s will suddenly find Pole Position speed in qualifying as a sand storm follows their cars down the straight.

    • Andy Flinn

      June 11, 2017 at 12:10 am

      Speedy, what are you talking about?

      What “hits” is Corvette taking from IMSA BoP?

      Corvette has won Daytona two of the past three years (2015 and 2016).

      Corvette has won Sebring the past three years in a row.

      Corvette won the 2016 IMSA GTLM championship.

      Corvette has won three of the four IMSA GTLM races (Sebring, long beach and CoTA) held so far this year.

      So how are the IMSA BoP “hits” hurting Corvette?

      Clearly, whatever IMSA is doing with BoP is not preventing Corvette from winning.

      So please get over it.

      • Greedy

        June 11, 2017 at 5:27 am

        Are you talking about Balance of Performance or Balance of Results?

        • Andy Flinn

          June 11, 2017 at 4:03 pm

          Greedy, if you’re winning, stop whining!

          I read in one of the Corvette magazines recently (because I like Corvettes, Corvette Racing and IMSA) that Doug Fehan is quite happy with IMSA BoP.

          He should be. I just wish Corvette fans felt the same.

      • JamieR

        June 11, 2017 at 8:43 am

        IMSA BoP has always been different (better) than in the WEC so i don’t think that is a fair comparison. For example last year the WEC Fords were slowed down more than the cars in IMSA.

        As has been said the Vettes have not been the standout car in terms of outright speed at any circuit this year, although it has certainly been up there. They have won due to excellent strategy, a standout drive from Garcia at Sebring, and the fact the C7R seems to look after tyres and cope better with changing conditions that other GTLM cars.

        • Joel

          June 11, 2017 at 9:55 am


        • Andy Flinn

          June 11, 2017 at 4:15 pm

          JamieR, again, Team Corvette has won Sebring three years in a row.

          You really want to tell me that Team Corvette won each of the past three years by overcoming crappy IMSA BoP?

          If any one team has benefitted from IMSA BoP, it’s Team Corvette (2016 IMSA GTLM Champions).

          Even with one car eliminated on lap one at CoTA, the other Corvette still managed to pass the BMW for the lead and win the race.

          The idea that Corvette is at a BoP disadvantage on IMSA is BS.

          • JamieR

            June 12, 2017 at 8:07 am

            Jesus have you got both contacts in one eye? Read what i said, IMSA BoP is pretty excellent.

      • Joel

        June 11, 2017 at 9:56 am

        In both of those wins the Corvette was not the fastest car.

  23. Zeebo Dickus

    June 10, 2017 at 11:43 pm


  24. Speedy

    June 11, 2017 at 1:58 am

    Andy Flinn and zeebo dickus, corvette racing is not winning on speed there winning because there team are not making any mistake. There not the fastest car’s out there, in these IMSA series, at lemans ACO/FIA series, even in ALMS/Grand AM, days (GT2,GTO,GTS,GT1) corvette racing were not these fastest car’s.

  25. asdf

    June 11, 2017 at 4:39 am

    Sadly, proof once again that running an honest pace on test day will hurt you. Should have held back and cried wolf about unfair BOP like Ford.

  26. Qsz06

    June 11, 2017 at 5:37 am

    How does a brand new car (Ford GT) win the biggest race of the year their first out? Watching IMSA, I have seen other new cars struggle the first year or so. Think Lexus this year. Paul Gentelozzi is no slouch, but they are struggling. When the Ford ends up several seconds faster than the Corvette during the race, something seems fishy. Can you say sandbagging?

  27. Steven

    June 11, 2017 at 10:38 am

    And the ACO bought into the complaining again.

    The same crap is gonna happen just like last year. Ferrari and Ford are all of a sudden gonna pick up 3-5 seconds magically and Aston, Porsche, and Chevy are gonna race just for pride.

  28. pop

    June 11, 2017 at 2:08 pm

    the Ford GT sounds like a wet fart

  29. TC

    June 11, 2017 at 2:31 pm

    The BOP is a good thing. it’s a hard thing to do. the Idea is to make the cars as close as posable on Raceday.
    The problem is sandbagging. When they (IMSA and WEC) punish for sandbagging this will not continue.
    We have watched for years at there struggles.

  30. Don Bingaman

    June 11, 2017 at 2:39 pm

    I’m not sure everyone should get into a lather on this one. 5-10 HP will not make that much difference, and I’ll bet Pratt & Miller have figured out how to make the car lower in drag for the straights, which is their real disadvantage relative to the Fords. In the meantime, the Fords have been trimmed back pretty dramatically by ACO’s pre-test BoP from last year…..if the beginning of the 2017 IMSA season is any indication, they may be back markers this year…..there only good race was by ONE car at Daytone – the rest of them have been pretty mediocre.

    Corvette’s real challenger this year will be Ferrari.

    • JeffB

      June 11, 2017 at 5:27 pm

      But… but… getting into a lather over the los’s of 5 bhp is what internet comment section’s are for!

      That, and using an apostrophe s every single chance you can, showing no understanding of the difference between a possession and a plural.

      Oh, and misspelling “sponser” religiously.

      Damn you ACO!

    • Bob

      June 12, 2017 at 8:25 am

      The beginning of the imsa season wouldn’t be. Ford was the fastest at Daytona and mistakes cost them having additional cars on the podium. Sebring they had a dominant run until they forgot how strategize. Long Beach was never a track for them and they were still close to the win and at COTA they were fast until they forgot how to race cleanly on lap 1. I don’t think it’s fair to say they’ve been slow.

      • Don Bingaman

        June 12, 2017 at 3:09 pm

        Their big advantage for Ford has been low drag which makes a difference on high speed tracks – especially Daytona. LeMans may be similar, BUT Ford got “Bopped” pretty hard this time – it will be interesting to see how they do in qualifying relative to the rest of the field.

        Their cars are also harder on tires than the Vettes. In a 24 hour race that is a big deal. I think the sleeper this year is Ferrari. The 488 is a better platform than the Ford and Ferrari has had a full year to sort it out. i think they will be a handful for everyone.

  31. Frank

    June 14, 2017 at 8:34 pm

    Corvette 2.5 behind in qualifying

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