ECUmaster DET3 piggyback system

[85'MR2]

Does anyone have experience running the ECUmaster DET3 piggyback system on their bluetop ecu? I'd like to know how it plugs in to the stock ecu and how is the system tune-ability wise. I need to run bigger injectors and preferably delete the AFM and the description on ECUmaster's website seems pretty good as well as the price.

[yoshimitsuspeed]

I don't know anything about that system but I am not generally a fan of piggybacks. I would generally say if you are at a point the stock ECU can't do what you need you are better off moving to aftermarket engine management.
It does sort of depend on the application which has me wondering what you are trying to do.
Also why do you want to delete the AFM?

[85'MR2]

I'm running a smallport with 11.3 compression and bigport injectors. I have 4agze injectors ready to be thrown at the smallport but i need something that can run the larger injectors. I'd like to delete the AFM just to clean up the engine bay so it's not all that important but if this piggyback can make the ecu run off a MAP sensor, then I can run ITB's as well in the future.

[yoshimitsuspeed]

I'm running a smallport with 11.3 compression and bigport injectors. I have 4agze injectors ready to be thrown at the smallport but i need something that can run the larger injectors. I'd like to delete the AFM just to clean up the engine bay so it's not all that important but if this piggyback can make the ecu run off a MAP sensor, then I can run ITB's as well in the future.

GZE injectors are too big for any build on the stock ECU. Your post is still confusing. I think more details would help a lot.
Adding compression does not increase the need for fuel so either you are just assuming it needs more fuel or you have other mods like cams that would increase the need for fuel. Even then it would take a cam that made power well over the stock redline to need enough fuel to warrant engine management and at that point you are going to want to raise your redline as well.
What ECU are you running?
Do you have a wideband?
What other mods?
How did you get the 11.3 compression? Stock pistons and shaved head? Or Aftermarket pistons?

[85'MR2]

What I am trying to do is find out if the ECUmaster DET3 piggyback will make my factory bluetop ecu run the GZE injectors. When the engine was dyno'd, the dyno AFR sensor saw that, at times I hit 16.3 AFR underload and had missfires around 5700rpm and 6200rpm. I do not have a wideband. I am running factory redtop cams. I have .5mm oversized pistons, shaved head, block and TRD headgasket.

[yoshimitsuspeed]

What I am trying to do is find out if the ECUmaster DET3 piggyback will make my factory bluetop ecu run the GZE injectors. When the engine was dyno'd, the dyno AFR sensor saw that, at times I hit 16.3 AFR underload and had missfires around 5700rpm and 6200rpm. I do not have a wideband. I am running factory redtop cams. I have .5mm oversized pistons, shaved head, block and TRD headgasket.

Then something is wrong with your setup. This is why I was asking. I had a feeling that you weren't exceeding the stock fuel system and with your list of mods you definitely aren't.
The first thing you should spend your money on is a wideband. This way you can do your own troubleshooting and diagnostics.
The next thing you will want to do is start troubleshooting the EFI system to figure out what is going on. The stock system can support 50% more power than you are making easily.
Check your spark plugs. Make sure all injectors are firing evenly.
Do the tests for the O2 sensor.
Test your AFM and your TPS.

Really though I would get that wideband first to make sure it wasn't an error like the sniffer not stuck far enough up the tailpipe or something silly like that. The 4AGE runs notoriously rich.
For example one of my customers running 264 cams and 11:1 compression pistons added an adjustable FPR and lowered their fuel pressure to lean it out a little bit to get AFRs where they wanted them.
People have run 7AGE hybrids on stock ECUs without much issue. That's a lot more of a displacement gain than you are looking at.
I can't answer your original question but I do think you are looking at spending money in the wrong place.

This is a great bang for the buck wideband and would be a much better place to start out spending your money.
http://matrixgarage.com/products/innovate-db-kit

There is a lot you can do without a wideband to troubleshoot your issues but it will be much faster and easier with it.