Paul M Posted July 12, 2014 Report Share Posted July 12, 2014 Hi, I have a 1.8 ohm fuel injector and 16.5-16.7V battery In the G4 installation manual it says to use a 2.2 ohm ballast resistor for injectors 0-2 ohm I have 4 injectors and will be using 4 injector drivers To figure out the injector current draw I did, 16.7/(1.8+2.2) = 4.175 amps Current seems too high and the recommendation in the G4 installation manual seems to low at 2.2 ohm What is an expectable injector driver amperage I should be aiming for?  Also can anyway recommend a fuel injector ballast resistor package or box - I know haltech sell one and many oem like WRX, RX7-8 and many Nissan models come with standard from factory Anyway know what resistance they are?  Thanks in advance Quote Link to comment Share on other sites More sharing options...
Fredrik Pettersson Posted July 12, 2014 Report Share Posted July 12, 2014 Just wire a single resistor to each injector , a 10ohm should be fine. im more worried about your voltage level.. Quote Link to comment Share on other sites More sharing options...
Dave Kriedeman Posted July 12, 2014 Report Share Posted July 12, 2014 Hi, LINK sell ballast resistor kits. Regards Dave. Quote Link to comment Share on other sites More sharing options...
Paul M Posted July 13, 2014 Author Report Share Posted July 13, 2014 What's the part no. for the ballast resistor and what's the resistance? 16V lithium battery but has more than 16V when fully charged Prefer to wiring resistor in neatly Something like this, need to know the resistance though http://www.ebay.com.au/itm/Nissan-22698-05U10-OEM-Injector-Drop-Resistor-Pack-RB26DETT-GTR-R32-R33-R34-/271526675938?pt=Motors_Car_Truck_Parts_Accessories&hash=item3f384045e2#ht_140wt_922 Quote Link to comment Share on other sites More sharing options...
Simon Posted July 14, 2014 Report Share Posted July 14, 2014 You ideally need to know the current the injector requires to open. Effectively the ballast is limiting the current to that required by injector. So if the injector needs 4 amps to open the a 2.2 ohm is about right. If it only need closer to 2 amps then a 4R7 resistor would be the right pick. A 10 ohm ballast will be far to big and the injector would likely never open. Quote Link to comment Share on other sites More sharing options...
Paul M Posted July 14, 2014 Author Report Share Posted July 14, 2014 Good answer, will check with the manufacturer What about ballast resistor packs, does Link sell these? Quote Link to comment Share on other sites More sharing options...
Paul M Posted July 14, 2014 Author Report Share Posted July 14, 2014 Manufacturer has said that the recommended amps to open injector is 5 amps at 12volts Do you recommend a smaller resistor to achieve the required amps, since 2.2ohm ballast resistor achieves 4.175 amps at 16.5V? Quote Link to comment Share on other sites More sharing options...
Simon Posted July 15, 2014 Report Share Posted July 15, 2014 I would go with the 2R2 50 watt resistors. At the higher voltage this will get the injector open happy. We can sell these if you need. Give sales a email and they can sort. Quote Link to comment Share on other sites More sharing options...
Paul M Posted July 15, 2014 Author Report Share Posted July 15, 2014 Ok thanks! Quote Link to comment Share on other sites More sharing options...
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