EcoModder Forum calc liter per hour by MAP - how?

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 04-18-2009, 10:26 AM #1 (permalink) EcoModding Lurker   Join Date: Apr 2009 Location: Germany Posts: 1 Thanks: 0 Thanked 0 Times in 0 Posts calc liter per hour by MAP - how? I´m not sure if I´m right here but I´ll try in my bad english. my car (MG TF) has no MAF-Sensor so I couldn´t use the formula: GPH = MAF * 0.0805 but I read, that MAP (mainfold air preasure) could be used to calc MAF MAF = RPM * MAP / absolute temperatur (PID15) if I do this MAF = 960 * 37 kPa / 27 °C = 1315 I know a engine like my 1,8L 135PS need 2 oder 3 Liter, so GPH = 0.6 with this should MAF be 7, if I calc with my OBD-value I got 1315, hopefully everyone unterstood the problem ... Do someone know a way, to calc with speed, rpm, mainfold air preasure and temperature GPH or Liter per hour ... the change form gallone to liter is not my problem???
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