Thumper Posted October 5, 2004 Share Posted October 5, 2004 I undid my injector plugs and put them back on and was wondering if you could put them on in the wrong order. So I searched and found that they all fire at the same time so you can not put them on in the wrong order. I was wondering if anybody could explain this? Do they fire six times or just once. If I read wrong how can I tell what injector plug goes on what injector? TIA Quote Link to comment Share on other sites More sharing options...
materchan Posted October 5, 2004 Share Posted October 5, 2004 yes they fire all at the same time, the fuel air mix sits in the runner for such a short time that it doesnt matter and the fuel will stay atomized. sometimes aftermarket or later fuel injection systems will batch fire injectors which is to say that they fire halk one time then half the other. batch fire only really helps in low rpm when the sir is sitting in the runner longer, but when it is at high rpm batch firing's effectiveness is a non issue. Quote Link to comment Share on other sites More sharing options...
Jason Jarvis Posted October 10, 2004 Share Posted October 10, 2004 yes they fire all at the same time, the fuel air mix sits in the runner for such a short time that it doesnt matter and the fuel will stay atomized. sometimes aftermarket or later fuel injection systems will batch fire injectors which is to say that they fire halk one time then half the other. batch fire only really helps in low rpm when the sir is sitting in the runner longer, but when it is at high rpm batch firing's effectiveness is a non issue. Just to clarify here, your info is technically correct, just one thing, the Z's injectors are batch fire, they all fire at once (in an single batch of 6), some aftermarket efi systems do allow you to break the batch down, 2 batches of 3 for example as you describe, but both methods are batch fire. The next step is sequential injection, or individual injectors firing timed with the cylinder. Many (most ?) factory injection systems have gone this way, but the arguments you make above (atomization / fuel condensation times not being critical) seem to be holding up there as well, so on average sequential injection doesn't seem to be worth the extra effort for performance unless you are after the 10th tenth of performance. For OEM's it is more of an emissions issue. Quote Link to comment Share on other sites More sharing options...
Hugh Posted October 10, 2004 Share Posted October 10, 2004 Yep, you can pick up a little fuel effiency and emissions. My Tec3 can run Sequential or Phased, or whatever else you want. I run Phased, so two of my injectors are paired, and the other two are paired. (on my SR20DET) When I installed this system, I was removing the OEM direct fire ignition and sequential injection system to replace it with Waste Spark and Phased Injection. I was concerned this was a step backwards in technology... my friend assured me it would be fine. Well, 50hp later... he turned out to be right. (I gained 50rwhp by adding the Tec3 and tuning for two nights) Quote Link to comment Share on other sites More sharing options...
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