Is there any way that the EMS can control water injection so that I can use the nitrous map to add ignition timing? Also, is there a way that you can use the level sensor in the tank to shut the nitrous map off when you run low on fluid (use the level sensor as the arming switch?)
Since 99% of the water injection systems us a variable displacement pump, can the EMS control that? Or can it only do a "pump on/pump off"
I want to buy a water injection kit but dont want any more controllers, modules, wiring, etc etc etc in the car. I would prefer to let the EMS do it all.
Is there a specific kit that anyone can think of that will let me do what i want to do?
AEM recently came out with their own water injection and i assumed they'd come out with one made specifically for people with an EMS...I guess i was wrong.
The AEM W/A kit or any other very basic W/A kit will integrate into the EMS using the nitrous mapping. This enables very simple W/A trigger and controlling = wiring is easy, but its not that accurate in control. Nitrous control even progressive is usually just a window to operate within and its on and off = all or nothing.
IMO if you have an AEM EMS make your own W/A kit and save a bundle. Buy just the hardware you need as an AEM kit to used with the AEM EMS in this instance offers nothing as you are paying for the brand not hardware. Look close at using the nitrous mapping in the directions and then what is contained in an AEM W/A kit and you will see that you do not need very much in hardware. Again, its makes for a simple W/A setup but it also does not offer much other then the simplicity.
Ok, but assuming the engine will require different W/A amounts at 5 psi compared to 25PSI, how do you control that with the EMS? Can you integrate the user programable PW map and the Nitrous map together?
Ok, but assuming the engine will require different W/A amounts at 5 psi compared to 25PSI, how do you control that with the EMS? Can you integrate the user programable PW map and the Nitrous map together?
dont quote me, but look into the secondary injector circuit it is capabul of amazing things and can pick up where the injectors leave off BUT actual injectors (like the hahn system) and a constant on fuel pump would be needed (fuel cell with dedicated pump) this was in the works but scrapped due to an A$$ hole (and my lack of any funding) ....this will be expensive but would allow O2 feed back
thats easy, wire up a relay and have the relay ground controlled by the ems.for example you can wire it up like this
ground the pump to chassis ground.run the b+ out of the relay to the pump.on the coil side of the relay run your 12v in and run the ground to low side driver #ls3 in the ems (just as an example)
next you go into the ems and click options>configure outputs
on the drop down menu selct ls5 and check basic activation.
if you want the w/i to come on at say 12 psi you want the basic activation to look something like this
coolant temp/at least 160*
load/at least 12 psi
rpm at least 3000
tps at least 80%
road speed at least 20 mph
that will make it work but i would suggest putting a switch on it as well for activation.to do that you click switched ouput configuration and setup the switch parameters for however you wire it up
EDIT: WHEN YOU USE AEM LOW AND HIGH SIDE DRIVERS DO NOT USE LS OR HS 1-4. USE 5-8 EITHER HIGH OR LOW.THE REASON WHY IS WHEN YOU KEY ON THOSE DRIVERS WILL PULSE FOR A SECOND. YOU DO NOT WANT YOUR NITROUS OR METH SPRAYING WHEN YOU KEY IT ON!!
Is there any way that the EMS can control water injection so that I can use the nitrous map to add ignition timing? Also, is there a way that you can use the level sensor in the tank to shut the nitrous map off when you run low on fluid (use the level sensor as the arming switch?)
Since 99% of the water injection systems us a variable displacement pump, can the EMS control that? Or can it only do a "pump on/pump off"
I want to buy a water injection kit but dont want any more controllers, modules, wiring, etc etc etc in the car. I would prefer to let the EMS do it all.
Is there a specific kit that anyone can think of that will let me do what i want to do?
AEM recently came out with their own water injection and i assumed they'd come out with one made specifically for people with an EMS...I guess i was wrong.
yes you cn do it like that.you will have to wire in an extra relay into the power wire for the pump. what it the level sensor output? 12v? if it is then you can take the power wire and cut it put the power to pin 87 and the other side to pin 87a so that when the relay isnt energized power will flow through 87 to 87a .on the coil side of the relay run pin 85 to ground and the 12v from the level sensor to pin 86. when the level sensor comes on it will actuate the coil side and switch the relay ouput to pin 30 which in this case would cause an open circuit and the pump wont come on.
actually now that im thinking about it you may want to actually run a wire from pin 30 to the switch input for the nitrous map so that it wont enable the nitrous map as well. you really dont want more timing if the pump isnt on
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yes you cn do it like that.you will have to wire in an extra relay into the power wire for the pump. what it the level sensor output? 12v? if it is then you can take the power wire and cut it put the power to pin 87 and the other side to pin 87a so that when the relay isnt energized power will flow through 87 to 87a .on the coil side of the relay run pin 85 to ground and the 12v from the level sensor to pin 86. when the level sensor comes on it will actuate the coil side and switch the relay ouput to pin 30 which in this case would cause an open circuit and the pump wont come on.
actually now that im thinking about it you may want to actually run a wire from pin 30 to the switch input for the nitrous map so that it wont enable the nitrous map as well. you really dont want more timing if the pump isnt on
would it be possible to make the EMS a variable controller (pulse with modulated) to the pump and use boost, o2 or tps as the X, Y
The way to best do this in my opinion would be to have the EMS control a 5th injector. The 5th injector would be for W/A injection. But an issue is that the AEM EMS does not really have anything in it for tying in a flow sensor.
The Hydra EMS has done this but sadly Hydra did not do a very good job in how they went about releasing the their EMS for the SRT-4 so everyone buys the AEM and nearly anyone runs the Hydra on the SRT-4. Look for Hydramist on the NASIOC site in the forum dealing with W/A injection so see how a water injection system can be integrated into an EMS.
I've read somewhere that people were using a pump that runs 100% duty cycle and then using a PW solenoid hooked up to the variable valve timing tables to pulse the proper amount of water into the intake.
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EMS controlled water injection
keep us all posted on ANY developments 
but would allow O2 feed back 
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