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Thread: Group-C real life info

  1. #11
    Thanks for the videos and info mate!

  2. #12
    I'm sure everybody saw this one, it is very notorious how the driver avoid to use high RPMs because of the big power. He use the brutal torque of that engine at low speed corners and just press full throttle when the car is pointing to a straight.

    Last edited by Damian Baldi; 23-08-2014 at 05:12 PM.

  3. #13
    Sauber C11 cockpit

    As you can see both german brands use the same RPM gauge.


  4. #14
    Some data about Mazda 787B fuel consumption

    Remember that in 1991, Le Mans was run to a fuel consumption formula, Mazda's 7 liters/lap equating to around 4.6 mpg. As only a fixed quantity of 2550 liters (674 gal.) of fuel was allotted for the entire race distance, fuel consumption was critical.

    At Le Mans, an 8500-rpm limit was used during the race and up to 9000 rpm was allowed for qualifying.
    Taken from this site
    http://community.us.playstation.com/...e/td-p/4496991

  5. #15

  6. #16
    Fuel consumption information


    Mazda 787b
    7 litre per lap at Le Mans put some perspective about fuel consumption with other cars. It's 14 laps per tank at le mans, so a tank run for near 50-52 minutes




    Porsche 956/962 (engines 2.6 (956) 2.8 3.0 and 3.2)

    General comparison
    The Garretson 935K3 (3.2 twin turbo) I drove got about 2.8 MPG at about 650 HP where the Group C spec was 55 L per 100 Km (4.28 MPG.) The 2649 cc (92.3x66) 4-cam in the 956 was spec at 620 HP (@8200 & 1.2 bar). The 956 was able to get noticeably better (particularly at reduced boost) than spec. I have heard of numbers like 6 MPG and still get close to 580 HP - remarkable. I think it was because Valentin was short enough to run around inside the turbo and work his magic. His intellect far exceeded his stature.
    From the Lucky7 winner 956 over the 962

    Note: race fuel limit that year was 2210 litres
    7 New Man Porsche 956B, with double-winner Klaus Ludwig at the wheel having driven well over half the race, led the survivors through the Ford Chicane for the last time in the middle of an ecstatic crowd, hooters and waving flags. Not only was it a back to back win for Ludwig and the #7 car, but they’d also set a new distance record (24 hours, 373 laps and 3,161 miles at an*average*speed of 131.745mph, still with 100 litres of fuel left unused)*

    The Ludwig car continued untroubled recording fuel mileage numbers of 40 litres per 100kms, with their rivals anywhere between 42-50! At the finish the NewMan Joest Porsche still had some 200-plus litres of fuel left, just to rub salt in the wounds.
    This is like 2.4Km per litre for the 956 engine in his lowest consumption, and 2.0km per litre as normal

    And 1.8 km per litre for the 3.2 of the 962 as normal




    Sauber C9/C11 (V8 M119-HL engine)

    This is the only data I could find about the Mercedes engine
    Due to the fuel consumption limitation for Group C-Cars - 51 litre/ 100 km - a high efficiency race engine was required to achieve the target fuel consumption during race events using a commercially available “pump” fuel.
    Given these restrictions, the latest version of the M119 HL-engine had a power output of 530 kW and minimum brake specific fuel consumption values of 235 - 260 g/kWh over the engine speed range.
    If someone can help to translate this to litre/km would be great.
    Last edited by Damian Baldi; 26-08-2014 at 07:07 PM.

  7. #17

  8. #18
    Fresh video from last sunday at Zandvoort. It looks the same as in Spa and Nürgurbring. The driver avoid to push too hard on slow corner. That engine have so so much torque that he can do slow corners on 3rd.



    Lovely sound
    Last edited by Damian Baldi; 03-09-2014 at 03:06 AM.

  9. #19
    Don't think this is racing, they are just two old men with lot of money to play at Silverstone


  10. #20
    Awesome stuff here mate. Thank you!

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