ELF ATMO RALLYE 4-STROKE ATMOSPHERIC ENGINES UNLEADED
         
    Typical figures FIA Regulation  
DENSITY Kg/l at 15°C 0.748 0.720 to 0.785  
REID VAPOUR PRESSURE bar at 37,8°C 0.570 maxi 0.900  
RON   100.0 mini 95/maxi 102  
MON   85.7 mini 85/maxi 90  
DISTILLATION (°C) 30 % 64    
  50 % 79    
  90 % 150    
         
  FBP 169 maxi 225°C  
  % vol. at 70°C 42 10 to 47 %  
  % vol. at 100°C 65 30 to 70 %  
OXYGEN % % Mass 3.4 3.7 % of the weight  
LEAD CONTENT g/litre < 0.005 0.013 g/l maxi  

 

  

APPLICATIONS

  • Complies with the FIA regulation.
  • Especially blended for 4-stroke racing engines running at high rpm.
  • Thanks to a selection of the most efficient petroleum streams having high combustion speed and improving volumetric efficiency, this fuel offers the best engine performances which can be achieved for natural aspirated engines with respect to the actual regulation.
  • Typical application : Rally cars

RECOMMENDATIONS

  • Best results can be achieved for equivalent air/fuel ratios in the 1.12 to 1.18 range : with reference to pump fuels, because of the oxygenate compounds used in the blending formula, generally speaking it is necessary to increase fuel ratio. Ignition setting must also be tuned in order to reach optimum performances.
  • In order to maintain the original properties, and according to Health and Safety regulations of commercial fuels, this gasoline shall be handled and stored in a cool place and always maintained in tightly shut drums.
  • The hydrocarbons selected to blend this fuel have in a certain extend, a propensity to knock. Consequently, this fuel is basically not suitable for 2-stroke engines.