question for a rs2 driver

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  • EspenW
    S2Forum Extremist
    • Apr 2007
    • 1534
    • Country: Norway

    #16
    Originally posted by |Maku|
    My RS2 takes approximately 6.5-7.0 liter per 100km on the highway (36.187831-33.602986), average is 9.0-9.5 (26.135656-24.760095). Using 391cc injectors with MTM 375ps software.
    Onboard computer will show faulty numbers when running different size injectors from stock (or different fuel pressure)
    1995 RS2 on Alcohol (6.8sec 100-200km/h)
    1994 80E Avant
    1986 2L Golf 2 on Alcohol

    Comment

    • |Maku|
      S2Forum Addict
      • Apr 2005
      • 248
      • Home: Estonia

      #17
      Originally posted by EspenW
      Onboard computer will show faulty numbers when running different size injectors from stock (or different fuel pressure)
      Well, a friend of mine who has completely stock RS2 uses the same software and numbers are the same. Believe it or not!

      Comment

      • EspenW
        S2Forum Extremist
        • Apr 2007
        • 1534
        • Country: Norway

        #18
        Originally posted by |Maku|
        Well, a friend of mine who has completely stock RS2 uses the same software and numbers are the same. Believe it or not!
        That is no surprise. The difference is that his numbers are closer to reality, since the computer thinks that the injectors in yours are still stock.

        Is the MTM program for stock injectors? If so, have you lowered the fuel pressure to compensate for bigger injectors?
        1995 RS2 on Alcohol (6.8sec 100-200km/h)
        1994 80E Avant
        1986 2L Golf 2 on Alcohol

        Comment

        • UrS4boy
          S2Forum Obsessed
          • Feb 2006
          • 11859
          • Country: Canada

          #19
          Originally posted by EspenW
          Onboard computer will show faulty numbers when running different size injectors from stock (or different fuel pressure)
          On board computers do not give you 100% accurate fuel use numbers even with everything stock. Typically, they are optimistic (more distance per fuel used than in reality).

          The numbers that were throw out there seem to be a bit "off" (as in rotten/wrong)

          10L/100km is 2.2 Imperial Gallon/62.1 miles = 28.2 miles/Imp gal (let's not even consider the smaller US gallon).

          Therefore 20L/100 km = 14.1 miles/Imp gal
          5L/100 km = 56.4 miles/Imp gal
          6L/100 km = 47 miles/Imp gal
          7L/100 km = 40.3 miles/Imp gal
          8L/100 km = 35.2 miles/Imp gal
          9L/100 km = 31.4 miles/gal

          20 mile/Imp gal = 32.2 km/4.54 L = 14.1 L/100 km

          etc where 1 Imp gal = 4.54 L and 1.0 km = 0.621 miles
          RS2'd 93 UrS4 5 spd sedan
          94 UrS4 V8 6 spd manual avant

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