Guest |591| Posted March 29, 2011 Report Share Posted March 29, 2011 This is from the manual.. Two 2Ω fuel injectors are wired to an injection channel each with a 4.7Ω ballast resistor, the battery voltage is 12V. What is the effective impedance of each fuel injector? Effective Injector Impedance = Injector Impedance + Ballast Resistance = 2Ω + 4.7Ω = 6.7Ω How much current will each injector draw? Max Injection Current = Battery Voltage / Effective Injector Impedance = 12V / 6.7Ω = 1.79 A How much current will flow into the injection channel (drive current)? Drive Current = Injector 1 Current + Injector 2 Current + Injector 3 Current + … = 1.79 + 1.79 = 3.58A Based on this you need a 4.7 ohm 50w resistor each pair of injectors. Mouser or Digikey would sell them. wouldnt it be =1.79+1.79+1.79 =5.37A being that im using 3 injector pairs? Quote Link to comment Share on other sites More sharing options...
Guest |591| Posted March 29, 2011 Report Share Posted March 29, 2011 http://www.mouser.com/ProductDetail/Arc ... F2JDoIY%3d this what im looking for right? Quote Link to comment Share on other sites More sharing options...
rayhall Posted March 30, 2011 Report Share Posted March 30, 2011 You have three 2.2 ohm injectors per output...!!!.. :shock: You need to be using a V88 or 12 ohm injectors. Ray. Quote Link to comment Share on other sites More sharing options...
rayhall Posted March 30, 2011 Report Share Posted March 30, 2011 this what im looking for right? Yes if you had two injectors per output. Quote Link to comment Share on other sites More sharing options...
Guest |591| Posted March 30, 2011 Report Share Posted March 30, 2011 You have three 2.2 ohm injectors per output...!!!.. :shock: You need to be using a V88 or 12 ohm injectors. Ray. no no no. lol 3 pairs of injectors, not pairs of 3. 2 injectors per pair, i thought you were saying for each pair it was 1.79A and i saw only 2 injector pairs being added up. I see now after reading the fine print though, you meant for each driver there is 1.79A for each pair. Quote Link to comment Share on other sites More sharing options...
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