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How much power is your Supra putting out?

It is hard to say how much injectors can support because of all the variables.Essentially some people have run the 550cc injectors to 550whp but this is at 50+ psi base fuel pressure, race gas and running lean in the upper rpms. I would think that 450whp would be a good safe limit. Just for...

I just read the manual and you can run low impedance injectors without the box. Just make sure you wire them in series and only run 2 injectors per driver. The max current per driver is 4 amps.

Are you sure you can run it without the resistor? I am pretty sure the injector drivers cannot support that amperage hence why the resistor box is necessary. I would personally not run them without a resistor box. I am using a resistor box on my MK4 injectors using the stinger and it works fine.

Yes to the above question.

Before you give up make sure you test everything. I doubt the EMS is at fault or the settings. If you can't get 2 cylinders to run it may just be a fuel or ignition wiring issue. Pull all the plugs crank the engine and check the firing order. Pull the rail out and see if all the injectors fire.

I really enjoy my Stance coilovers.

I am pretty sure you just have a wiring issue that needs to be sorted out. Like you said you have tried 7 maps and still failed to get it running. Like I said triple check the wiring and especially watch the fuel one.

Actually that is not entirely correct. The injectors may be that resistance but the factory wiring for the injectors has them wired in pairs. With that said the actual resistance is half and the closest value on the stinger is 4.5ohms. I would verify that you have your injectors wired correctly...

I really want to jump onto the newer turbocharger bandwagon. I am just stuck in the world of if it aint broke don't fix it. My current turbo is in perfect condtion and makes it hard to justify buying a new one. Hmmmm.

I completely agree with bigaaron. You need to sit down and actually read the manual. I had no idea what a standalone was or how to set it up but I read through the manual and made sure I understood everything. Since then I have played with the software and see how my car reacted. I have since...

Sigh I wish we had it too.

I don't know if this will help any but here is how I have my Stinger setup.

Does the EMS run sequential fuel? You may need to check to see if you have it wired that way because from the factory it is batch fuel injection. Just a thought.

^^ Your car sounds just like mine.

Yes I am running a resistor pack with the MK4 550cc injectors. It is a must running low impedance injectors.

I am sure that will fix the fuel economy drastically. I guess you never had a wideband to realize it was running so rich?

Wow this really thread really inspires me to go 1.5jz. Then again it is hard to justify it when my 1jz is operating perfectly.

What they said ^^^

To set up the stinger for wasted spark you have to do it going from the ECU output to the ignitor. Leave the wiring from the ignitor to the coils as it is.