Announcement

Collapse
No announcement yet.

Diesel International Land Speed Record

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    Diesel International Land Speed Record

    Introduction
    On August 23 2006, at the Bonneville Salt Flats, the JCB twin-engine powered streamliner, DIESELMAX, driven (piloted?) by RAF Wing Commander Andy Green, set a new FIA certified world's land speed record for diesel-powered cars at a speed of 350.092 MPH. JCB, headquartered in Great Britain but selling world-wide, is said to be the world's fifth largest construction and agricultural equipment manufacturer.
    References:
    http://www.jcbdieselmax.com/html/home.php This is the company website and contains a video, photos, and more detailed information.
    Additional information can be found in two articles in the Australian online car enthusiast magazine, Autospeed:
    http://www.autospeed.com/cms/A_2962/article.html Diesel Speed Demon
    http://www.autospeed.com/cms?A_108108/article.html 350.092-Breaking the Diesel Speed Record

    The land speed record engine started out as a production diesel, the JCB444, which is fitted to the 4CX, 3CX, and 2CX JCB backhoes and Loadall Telescopic handlers. The JCB444 is a 4-cylinder inline engine with a bore and stoke of 103mm x 132mm and a displacement of 4.4L. It is available in two NA configurations with 74HP and 320Nm (236 lbs/ft) torque and 84HP with 425Nm (313 lbs/ft) torque; and two turbocharged versions with 100HP and 525Nm (387 lbs/ft) torque and, with the addition of intercooling, 125HP with 620Nm (457 lbs/ft)torque. The boost pressure of the stock engine is 2 bar Abs (29 PSI Abs; 59.06 "HgA).

    JCB's intention in creating the world's fastest diesel was to prove the versatility of the standard JCB444 production engine. The point was to use the standard engine block, cylinder head and bedplate. With modifications, it still had to be recognizably the JCB444 engine. According to the company, the engine had been designed as a tough, long-life powerplant with a very stiff bottom end that would have the inherent strength to withstand the very high cylinder pressures generated by the planned high boost pressures needed for the record attempt.

    Principal Modifications
    To reduce frontal area, the engines were laid on their sides 10 degrees from horizontal. This necessitated the construction of a dry sump lubrication system. Since the combination of high boost levels, increased engine speed and piston-cooling jet oil flow turns the oil into foam, the dry sump tank had to be designed to condition the foaming lubricant incorporating several levels of centrifuge separators and baffles through which the oil would flow. It would take five layers of these components to ensure that the bottom layer would contain pure, air-free oil.

    The combustion system was heavily modified through the use of Ricardo High Speed diesel Race (HSDR) direct-injection combustion technology. Fuel is delivered via two parallel high-pressure pumps to a common-rail system providing an injection pressure of 1,600 bar (23,206 PSI). Modifications had to be made to the cylinder head to house the larger injectors required for the HSDR system. Despite these changes, the design team decided that the valve train could be left essentially in its original form, with the exception of higher temperature spec exhaust valves, heavier valve springs and a modified camshaft.

    It was calculated that for the speed record attempt, the two engines would require an intake air flow of almost 5 tons/hour. Additionally, Bonneville is at an elevation of 1,300m (4,265') where ambient air pressure is 85% of that at sea level. While the production engine uses a boost of 2 bar Abs, the two engines installed in the DIESELMAX would each require a boost pressure of 6 bar Abs (87 PSI Abs; 177.18 "HgA). By way of comparison, the diesel Le Mans racer uses ~ 3 bar Abs (44 PSI Abs; 88.59 "HgA) and the turbo-era Formula 1 cars utilized ~ 4 bar Abs (58 PSI Abs; 118.12 "HgA). To accomplish the air flow requirement, a two-stage turbocharger system was developed incorporating both an intercooler and an after cooler, as well as a water injection system to further cool the charge.

    A new, longer-stroke, billet crankshaft was installed raising the displacement to 5.0L. It still retains the production main and big-end bearing sizes and bearing shells-a testament to the original design. Completely new, fully-machined connecting rods were installled with a significantly enlarged small-end bearing.

    Since a radiator would have created too much drag, a cooling system using a 200L water and ice tank was located in the front of the vehicle. The latent heat required to melt the ice, in addition to the low water temperature, provides the cooling.

    Results
    Each of the modified 5.0L engines develop 750HP (560kW) @3,800 rpm and 1,500Nm (1,106 lbs/ft) torque @2,500 rpm. For you BMEP enthusiasts, the rating at maximum HP is 512 PSI (35.3 bar) and that at maximum torque is 547 PSI (37.7 bar). Currently, they are the world's highest specific output-power diesel engines with a rating of 150 HP/liter. This compares with the 300 HP/liter that Formula 1 engines are currently approaching. The power is transmitted to the road wheels (all 4-wheels are driven) through two 6-speed gearboxes coordinated and synchronized to work together. Based on the current performance, the builders believe that even higher speeds will be easily obtainable in the near future.


    Not bad for a couple of backhoe engines.

    Happy Motoring!
    Attached Files
    Last edited by goldstar; 03-23-2010, 09:39 AM.
    02 DX Millenium Red - The Penultimate Driving Machine
    MP3 Strut Tower Bar kit; Cusco Front Lower Arm Tie Bar
    MSP Springs, Struts, Stabilizer Bars, Trailing Links, #3 Engine Mount
    Kartboy Stabilizer Bar Bushings; Nyloil Shifter Bushings; Red Line MT-90 Gear Oil
    MP3 Shifter, Knob and Aluminum Pedal Set
    Suvlights HD Wiring Harness; Osram Night Breaker H4 Bulbs; Exide Edge AGM Battery
    Summer: 5Zigen FN01R-C 16 x 7" Wheels; Yoko S.drive 205/45-16s
    Winter: Enkei OR52 16 x 7" Wheels; Falken Ziex ZE-912 205/45-16s
    Modified OEM Air Intake; Racing Beat Exhaust System; Techna-Fit SS Clutch Line
    Denso SKJ16CR-L11 Extended Tip Spark Plugs; Magnecor Wires
    Power Slot Front Brake Rotors; Techna-Fit SS Brake Lines; Hawk HPS Pads
    Red Line Synthetic Engine Oil; C/S Aluminum Oil Cap
    Cyberdyne Digital Gauges: Tach; Ambient Air Temp; Voltmeter

    #2
    1100ftlbs makes me
    '90 AWD Protege, full GTR drivetrain swap, ~320 whp daily driver, RIP, and
    '90 AWD Protege, yet another GTR swap, Open class rallycar with a Toyota GT4 gearbox swap, thus crossing the line between hobby and mental illness. And a Brabus E55 K8, removing all doubt.
    http://www.wihandyman.com/forum/vbpi...?do=view&g=110
    http://www.cardomain.com/ride/2599486

    Comment

    Working...
    X