neil brown Posted March 26, 2014 Report Posted March 26, 2014 can the link ecu which runs high impedance injectors as standard  can i add in a resistor in line to bring up the value to run these low impedance injectors as requiring 650cc instead of 440cc as going to running a garrett gt2860rs turbo shortly Quote
neil brown Posted March 26, 2014 Author Report Posted March 26, 2014 what i mean the standard injectors are high impedance and i want to run these low impedance injectors as they are the correct size for what i need  can i add in a resistor to increase the value to the same as high inpedance injectors and will the ecu drivers be ok with it Quote
Simon Posted March 26, 2014 Report Posted March 26, 2014 Yes low impedance can be used if a ballast resistor pack is used. A typical low impedance injector of around 3ohms will require a 4.7ohm ballast resistor per injector. Quote
neil brown Posted March 26, 2014 Author Report Posted March 26, 2014 what wattage of resistor should i use  will get values tomorrow from orginals and the ones i will be using Quote
Simon Posted March 27, 2014 Report Posted March 27, 2014 25w would be recommended Note the ballast is setting the peak current to the injector not matching the total resistance. Quote
neil brown Posted March 27, 2014 Author Report Posted March 27, 2014 so a ballast pack limits the peak current  so can i still add the 4.7 ohm resistor to the system and run these low impedance injectors Quote
neil brown Posted March 28, 2014 Author Report Posted March 28, 2014 just to clarify  each injector has a common 12v feed and each switch wire goes back to the ecu  do i need 4 of these resistors, one wired in series onto the switch wire  Quote
Simon Posted March 31, 2014 Report Posted March 31, 2014 You need one resistor per injector wired to be in series with the injector. It can be on the power supply or ECU side of the injector. Quote
neil brown Posted May 15, 2014 Author Report Posted May 15, 2014 right thats the manifold and wiring sorted  added in 25 watt 4R7 ohm resistor into the system, the orginal injectors were 11 ohms and new injectors are 3.1 ohm with a 4R7ohm  25 watt resistor  with this set up will the injector outputs on the ecu be able to run this quite happily Quote
Scott Posted May 16, 2014 Report Posted May 16, 2014 Hi Neil, Our documentation specifies a 4R7 Ohm ballast resistor for a 3.1 Ohm injector. Above Simon recommended a 25 Watt resistor. It looks to me that you have this right. When you wire each injector put the ballast resistor between the 14V supply and the injector. Scott Quote
neil brown Posted May 16, 2014 Author Report Posted May 16, 2014 thats done, thats how i wired it and had to modify the engine loom to do it as a common feed to each injector, now single feed to the ballast packs then indivialfeeds to each injector Quote
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