turbo5speedgl Posted October 2, 2008 Share Posted October 2, 2008 Would the n/a 280zx injectors be better than the stock ea82t injectors. I read up on the 280zx turbo ones but no one really says anything about the n/a ones. I've heard that stock ea82t injectors flow 180 or 185 and I saw on some other sites that the 280zx flow 188 or 200 so I dont know which is right. Just wondering if theyre better then stock. I want to up the boost to about 9 or 10 psi im running a wrx intercooler too. Also whats a cheap good way to up fuel pressure like just any adjustable fpr or is there a specific one to use that i can get pretty easily? Link to comment Share on other sites More sharing options...
zukiru Posted October 2, 2008 Share Posted October 2, 2008 the adjustable FPR with gauge is all over ebay. even has a gauge. not sure what the injector flow is on a NA ZX I have easy access if you'd like a set. Link to comment Share on other sites More sharing options...
presslab Posted October 2, 2008 Share Posted October 2, 2008 The 280ZX-T injectors really do not flow much more than the stock EA82T. There is some confusion on the flow rate, is seems that not everyone measures the flow at the same fuel pressure, so without the fuel pressure the cc is meaningless... I'd imagine the 280ZX N/A ones flow the same or possibly less than the stock EA82T. It is possible to "crush" the stock FPR. You will need a fuel pressure gauge. Take a block of wood and cut a notch out of it to clear the vacuum line going into the FPR. Support the FPR in the back with some thin pieces of wood, and put the wood with the notch on the top. I hit the wood on top with a framing hammer about 4 times and bumped up the fuel pressure by 10 PSI. Go slow, if you hit it too much you can't undo it. This is definitely a cheaper option than new injectors. To make the computer happy add a variable resistor to the MAF. Link to comment Share on other sites More sharing options...
Turbone Posted October 2, 2008 Share Posted October 2, 2008 The EA82T injector flow rate is around 180cc. The 280ZXT is around 265cc. Not significant, but substantial. Need to get a higher FP rate going as stock is only 37psi. I have heard of the crush mod on recirc valves, but never on FPR's. I certainly wouldnt want to try that without the pressure gauge. Link to comment Share on other sites More sharing options...
presslab Posted October 2, 2008 Share Posted October 2, 2008 A lot of people say the stock injectors are 180cc, but at what pressure? The 280ZXT are ~250cc @ 40psi. Someone on here measured the stock turbo injectors at ~220cc @ 40psi. http://www.ultimatesubaru.org/forum/showpost.php?p=323920&postcount=68 http://www.ultimatesubaru.org/forum/showpost.php?p=598691&postcount=3 Link to comment Share on other sites More sharing options...
Turbone Posted October 2, 2008 Share Posted October 2, 2008 In the first link, he was using a RRFPR and chemicals(s) to clean the injectors. So those are the duty cycle rates of the EA82T inj. But why is there 2 readings for 100%? What are the duty cycle rates of the Z injectors? They have to be more than the EA ones. Link to comment Share on other sites More sharing options...
presslab Posted October 2, 2008 Share Posted October 2, 2008 In the first link, he was using a RRFPR and chemicals(s) to clean the injectors. So those are the duty cycle rates of the EA82T inj. But why is there 2 readings for 100%? What are the duty cycle rates of the Z injectors? They have to be more than the EA ones. Yeah the first test would have been better with straight gasoline. However it sounds like all the tests were at 40 PSI, so the RRFPR doesn't matter. 100% duty cycle just means the injector is full on, maximum flow. There are two readings because it was tested at two different fuel pressures. The output flow rate is almost directly proportional to the fuel pressure. Link to comment Share on other sites More sharing options...
turbo5speedgl Posted October 3, 2008 Author Share Posted October 3, 2008 i have 280 zx n/a injectors but i just dont want to waste my time installing them and find out they dont flow more or better. so i dont need a rrfpr i just need a normal one and set it to 40psi and be done? Link to comment Share on other sites More sharing options...
Turbone Posted October 3, 2008 Share Posted October 3, 2008 I would either do the crush mode like Presslab was talking about or get a higher psi fuel pump to go along with the injectors and regulator. Link to comment Share on other sites More sharing options...
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