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BMW M8 GTEs Adjusted in Sebring Test BoP

IMSA makes power adjustments to BMW M8 GTE ahead of next week’s Sebring Test…

Photo: Rick Dole/IMSA

BMW’s new M8 GTE has received power adjustments ahead of next week’s Sebring Test, in the latest round of Balance of Performance changes confirmed by IMSA.

The new-for-2018 car, which was the subject of a BoP debate at last month’s WeatherTech SportsCar Championship season-opening Rolex 24 at Daytona, has been given an increase in top-end turbo boost, while slightly reduced levels at selected lower-end RPM ranges.

The turbocharged V8 will have less power at the 2500, 3000 and 4000 RPM levels although will benefit from from increased output at 5000-7500 RPM.

It marks the first change since the German manufacturer’s critical comments at Daytona, when BMW Motorsport Director Jens Marquardt claimed they were “not treated fairly” in the run-up to the car’s competition debut.

Marquardt backpedaled post-race, having stated they were now in “productive and open” talks with IMSA on the BoP process moving forward.

In addition to the power adjustments, the BMW, along with the Porsche 911 RSR has been given a two-liter fuel capacity increase, while the Daytona class-winning Ford GT loses two liters.

Other BoP changes include a 1.0 mm larger air restrictor for the GT Daytona class-winning Lamborghini Huracan GT3, putting it on the same-sized 39 mm x2 restrictor as the Audi R8 LMS, which features the same V10 powerplant.

The Mercedes-AMG GT3, meanwhile, has been given a 1mm air restrictor reduction but countered by a 5kg weight break.

Fuel capacity adjustments have been made to GTD across the board.

Aero Changes in Prototype

All four DPi cars have reverted to high-downforce specifications for Sebring, and the rest of the WeatherTech Championship season.

The Cadillac DPi-V.R, Mazda RT24-P, Nissan Onroak DPi and Acura ARX-05 are now all permitted to utilize front wicker options, along with adjustments in the maximum height and angle of wickers and rear wings.

The Gibson-powered LMP2 cars, meanwhile, remain as homologated by the FIA.

While no power or weight adjustments have been made to any of the Prototypes, the Acura DPi will have a three-liter fuel capacity reduction.

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. Jake

    February 15, 2018 at 11:10 am

    And yet no changes to the Fords, who walked away from every other competitor with ease.

    • JEZ

      February 15, 2018 at 11:20 am

      Low down-force configuration and tracks high down-force configuration tracks. It will be closer.

      • JEZ

        February 15, 2018 at 11:21 am

        Not sure why the comments removed symbols. That should have said low down-force does not equal high down-force.

        • Jaymo

          February 15, 2018 at 11:33 am

          You mean..,

          A car designed for low downforce walked away at Daytona…

          Who knew?!

          • Merlot Brougham

            February 15, 2018 at 12:09 pm

            I know right, in a race with record low yellows that isn’t bunching up the field and artificially making it close. In a car that has never won a championship and is notorious for slow restarts after yellows. Everything went their way and they need to be punished for it!

            BOP these cheaters out of existence!!!!

          • Jaymo

            February 15, 2018 at 12:25 pm

            Also in a race where literally every other manufacturer had an issue except Corvette it seemed, and without the yellows to get them back on the same lap who knew?!

    • Andy Flinn

      February 15, 2018 at 12:26 pm

      Cheer up, Jake.

      Team Corvette has won Sebring the past three years in a row. They beat Ford the past two.

      So it’s kind of tough to argue that the Corvettes won’t be competitive (again) with the Fords at Sebring this year.

      • Jaymo

        February 15, 2018 at 12:33 pm

        Servings a completely different animal, nevermind when we get to Long Beach and such, the Fords didn’t even win the pole or have the fastest lap at Daytona, they literally just ran a flawless race, it happens. Let’s grab a few races data before we say someone has a huge BoP advantage

        The M8 is going to get BoP before every race coz well


        • TimS

          February 15, 2018 at 12:52 pm

          But it’s clearly a coupe?

        • Andy Flinn

          February 15, 2018 at 4:05 pm

          In addition to being one of the coolest cars ever, the BMW CSL competed (and won races) against Porsches and other sports cars.

          The CSL was a sedan (well coupe) just like the M8.

          Anyway, it’s a good thing the class is GT (Grand Touring) LM and not SportsCarLM.

          The BMW is definitely a GT.

      • Jake

        February 15, 2018 at 4:00 pm

        The old BOP based on results theory. God is that fucking annoying to hear all the time. Go look at those Sebring wins. None of them should have happened, as each time they won due to luck, not pace. Risi threw it away in 2016, and Porsche had a flat with 15min to go, and far more pace than Garcia. Ford also made terrible strategy calls at the end of last year that put them all on old rubber for the finish. BOP is for balancing the cars potential pace, NOT its past results! And FYI after winning those Sebring races on luck, Corvette were either bop’d back, or others bop’d forwards. IMSA BOP the teams and not the cars. Dont make mistakes and have great strategy, well then piss on you, you will run all season half a second or more off the pace so you cant win everything!

        • Andy Flinn

          February 15, 2018 at 4:14 pm

          Jake, pure luck three years in a row – at Sebring of all places?

          If that’s true Team Corvette should play the lottery. They’d clean up.

          As far as IMSA GTLM seasonal BoP goes, last year IMSA disadvantaged Team Corvette straight into a second consecutive GTLM championship.

          But I suppose you can site all kinds of ways Team Corvette “lucked” into both of those championships as well.

          Team Corvette is a great team. They demonstrate their talent, skill and preparation, and abilities race after race. But they don’t win because of luck.

    • Trevor

      February 15, 2018 at 7:13 pm

      Since when is losing two litres of fuel “no change”? Anyway, as others have pointed out, the Ford’s are not only designed to specifically win at high speed tracks, they also avoided mechanical issues at Daytona.

    • GimmeShelter

      February 20, 2018 at 2:17 pm

      GNR Ford GTs have a sweetheart deal with IMSA. And this has ruined the once stellar GTLM category.

  2. Louis

    February 15, 2018 at 12:52 pm

    Oooo another anti Ford/ pro Chevy debate in the 365 comments. Time to make popcorn and heat up the butter.

    • Andy Flinn

      February 15, 2018 at 4:19 pm

      Louis, I actually like Corvettes – especially the race cars.

      I wish there were MORE.

      I just don’t buy it when people say that IMSA BoP is unfair to Team Corvette. I’ve also been following the sport long enough to remember what happened to ALMS GT1 in 2009.


  3. fourloko

    February 15, 2018 at 1:10 pm

    ill ask the drivers in person when i go what they did to the ford to make it faster over winter and report back.

    • Jaymo

      February 15, 2018 at 2:41 pm

      Except it wasn’t faster? The car has another year on it’s development and was fastest at the Roar test. The car was built with Daytona and Le Mans in mind. It’s also why it runs really well at Road America. It’s not like they were out to lunch all winter at the tests and at the race and then all of a sudden it’s a bullet.

      • Andy Flinn

        February 15, 2018 at 4:24 pm

        Jaymo, the Fords were also prepped and raced by CGR who only have SIX overall wins at the Rolex24 at Daytona.

        • Jaymo

          February 15, 2018 at 5:18 pm

          Yea sure that has nothing to do with their success the last two years also

          Def just BoP

          • Merlot Brougham

            February 15, 2018 at 5:32 pm

            What success?!? The car has not won a championship nor the manufacturer.

  4. Pete

    February 15, 2018 at 2:29 pm

    Probably worth noting that IMSA can obviously adjust BoP again after they see testing data and apply it for the actual race weekend.

    But I understand that logic isn’t often welcomed in the comments section.

  5. Merlot Brougham

    February 15, 2018 at 2:57 pm

    I find it totally disingenuous to admit that your program is months behind, mostly due to outside factors, and then beg to make your car more competitive. They clearly still have much development to do and the car will always be getting faster. So does that mean they’ll get a new BoP each race as it gets better to peg it back? BoP is bad enough without lobbying for breaks on brand new cars in development. And this is coming from a Rahal and BMW fan.

    • Trevor

      February 15, 2018 at 7:25 pm

      I’m afraid that’s exactly what we’re in for. To some extent, that’s how the M6 became so competitive in the second half last year. RHL is very good at lobbying fort BOP, and I too am a longtime Rahal fan.
      BTW: excellent and totally underappreciated screen name.

  6. Mike S

    February 15, 2018 at 7:11 pm

    Easy I think this could be a better GTLM race than Daytona. Ford hasn’t shown consistency for an entire season yet. They struggled midseason last year mostly from bad driving or poor luck though. COTA lap 1 turn 1 as an example just look it up or ask Risi.

    • Michael Coter

      February 16, 2018 at 1:32 pm

      They may have been more successful if a certain corvette had no hit them, Yes I am looking at you number 4

    • WBrowning

      February 16, 2018 at 4:25 pm

      Yep, Long Beach too!

  7. ghwhinerssuck

    February 16, 2018 at 6:01 pm

    I love the GM whiners going on about how unfair IMSA/NASCAR is to Corvette when they they won the championship and the Caddies won a championship last year due to nothing but a favorable, outlandishly so, BOP.

    GM whiners always forget that IMSA/NASCAR stated that the WEC P2 cars would be the standard for performance and when they finally made a a half-assed effort to enforce that the GM whiners went ballistic.

    Never mind that when you look at BOP for Daytona in 17 versus 18, they TOOK BOOST away from the Nissan for 18 but all the GM whiners can do is whine that IMSA is screwing the Caddies.

    One guy even stated that Caddies should have won every race last year and he’s probably right, given the BOP last year and the 2 years that the DPs were still “winning”. What a joke.

    But hey, let’s listen to the Government Motors flunkies whine and whine.

  8. Terd Frankfort

    February 16, 2018 at 10:27 pm

    Love your childish, foolish message board name. Even better when you can not spell it. Dealing with another internet genius. I think the Pinto is warmed up, hurry before it explodes!

  9. 333sp

    February 17, 2018 at 12:36 pm

    all BoP is trash

  10. juneracer

    February 18, 2018 at 7:35 am

    Corvette and Porsche have the upper hand at Sebring regarding BoP with BMW a wild card with continued help from IMSA. the GTLM Ferrari is at the bottom of the pack, assuming BWM is up now. the Porsches turned it up end of last year to lose it in the pits and they are up of BoP form last year. Corvette is the biggest recipient of BoP 2017 to 2018. but they are cleaver and wont show. the BoP is published data, its not hard to see this trend…

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