Seen the newest AEM product, the EMS-4. Seems very simple, inexpensive, and straight-forward. Anyone have any experience yet?

Thanks,

Andrew

 

It is essentially the same thing as the Series II ECU's. Just a lot less I/O's. No sequential control and no OMP operation. For a single turbo FD It will work really well. Let me know if you need any help with install. I am really good with AEM's and RX7's.

EB Turbo

 

Will do!

Thanks,

Andrew

 

It does saturated style injectors only (high impedance). One of my least favorites part about it. You can buy a box from FJO to convert it to peak and hold style (low impedance)

 

FJO doesn't sell it anymore. Think they have stopped all direct sales and only build for private labels now. AEM has their own injector driver.

 

Just use either stock 550 or 850 as the primaries and the Injector Dynamics 2000cc secondaries and you are good for 600-650bhp.

EB Turbo

 

?? Will low impedence injectors work with some 10ohm resistors inline, or would it be better to just get the AEM Driver?

 

I'm with EB. 2500 cc/min is a lot of fuel for most builds. If you must use a different injector, my experience with resistors has not been good. The peak and hold injectors want a lot of current to open properly. When they don't get it with a resistor, they get sluggish and non-linear. The high ohm options are now too good to use resistors.

 

so if i get this aem ems4 and drop it into my non running s4 body, that has a full (from head light to tail light) s5 wire harness with an s5 TII motor in the bay i can turn the key after minor wiring?

 

Depends on how you implement the wiring of the EMS4. If you splice it in or make a PnP adapter harness then yes. If you make a new harness, no. There are also some conversion sensors and such. Coolant temp, air temp and modify the trailing coil. Also the electric S5 omp will not be able to be driven by the EMS4. If the electric omp is something you want to retain you will need a 30-6050 series II ecu.

EB Turbo

 

Any updates on this EMS, Im looking to replace my PFC.

 

If you are looking to switch away from a PnP PFC a better option would be to switch to a 30-1800 Series I AEM(discontinued, new old stock or second hand only), Series II with PnP adapter(Here) or one of the modified adapter board Series II ecus(Here).

The EMS-4 will require an adapter or a new engine harness. Plus the EMS-4 is limited with 4 inj and 4ign outputs. It also has a very limited amount of I/O's and no provision for OMP control. The EMS-4 really shines in single turbo, no OMP, "simple" builds.

EB Turbo

 

I will be buying the EMS pretty soon and all the necessary parts to get my FC to run.

There are a few things/parts that I need to see exactly what I will be getting, such as fuel injectors, low impedance Injector Driver and fuel pump.

Anyways, here goes. I will be listing the part, part#, MSRP and I'll try to include a link to a product page.

AEM:

EMS-4: 30-6905
$844

EMS-4 Universal Standalone Engine Management System

EMS-4 96" Harness(with fuse panel and relay): 30-2905-96
$254

EMS-4 96" Wiring Harness with Fuse & Relay Panel

AIT Sensor(3/8"NPT w/ Aluminum Bung and Connector): 30-2010
$55

Air Inlet Temperature (AIT) Sensor Kit

1/8" PTF Temperature Kit(w/ connector): 30-2012
$42

1/8"PTF Water / Coolant Temperature Sensor Kit

Boost Control Solenoid(w/ Barb Adapters and Connector): 30-2400
$96

Boost Control Solenoid Kit Solenoid

Peak and Hold Inj. Dirver: 30-2710
$317

Peak & Hold Injector Driver Module - Wideband O2 UEGO, Water/Methanol, Stand Alone Engine Management, Piggyback F/IC, Tru Boost Controller, Gauges, Automotive Performance Electronics


Innovate Motorsports

MTX-L: 3844
$199.99

MTX-L Wideband O2 Digital Air/fuel Ratio Gauge


AutoMeter

Thread Pitch Adapter(M12x1.5(male) - 1/8" NPT(female)): 2277
(Used to get rid of stock ECU Coolant temp sensor and install the AEM sensor behind the waterpump)
$8

Auto Meter 2277 - Auto Meter Metric Adapters - Overview - SummitRacing.com


There are more parts to come but I just would like to share this so we can all see what one would need to install the EMS-4 on a 13B(in this case a S4)

Do Work!

 

For that price you could buy 4 impedance injectors. You should consider it.

 

You can also buy a direct fit temp sensor instead of the 1/8" sensor and adapter.

 

Yea but I cannot find the exact part # I would need for either RC Engineering or Deatschwerks Injectors that are 7-800 cc's and be a direct fitment.

If somebody knows what part # injectors I need that'd be great. I had a hard time getting solid info from Deatschwerks which I really want to go with.


Which one is direct fit and already compatible with the AEM units? I couldn't find one that would work.

 

I donno where you got your pricing, but I have found..

AEM EMS -4 $675 shipped (captwholesale.com)
96 harness w/fuseblock $233 shipped (capt again I think)
AEM 4 channel ignitor $170 shipped (or smart coils)
Crane Lx92 coils x4 $268

I've been under the impression you can calibrate it to use stock sensors?
and the FJO peak and hold box I found for $150+ship new, but I also seen a couple of guys talking about how they discontinued it. You can get them used for like $100 bucks. Alot cheaper than 4 injectors.

 

The pricing is just MSRP or whatever the manufacturer sells it at. You can definitely get everything for a lower price if you do some shopping but I left those prices out because they do tend to change and are sometimes sold through Unauthorized Resellers.

As for ignition, I will be using the same coils that come on the FC, or I might get fancy and but the AEM "Smart Coils"(30-2853) so there is no need to get an Ignitor.

And you can definetly calibrate the EMS to read any sensor but I don't have the tools to do it. Plus I honestly see it as a waste of time, especially since I don't work at a shop. It's just my little project.


BUT does anyone know what injectors are out there that are a direct fitment as far as bolting on and High Impedance so I don't have to get a driver?!

 

As far as the coolant sensor, we stock them.

Injector Dynamics are what we use and recommend for any application and they happen to all be high impedance. They may cost more than a similar injector from another source, but you're assured of the quality and fit for stock or custom rails.

 

So I already ordered all the parts I will be using and should be able to post up all the sensors, injector, and any other parts numbers of what I got.

I'm going through the AEM Tuner and messing around with it before diving into this.

I'm having trouble setting up the MAP sensor calibrations. I cannot find a proper calibration in the Sensor Wizard for the MAP sensor I'm using.

I decided to go with the AEM Failsafe Wideband, which offers a O2 sensor output(for which I'm using the AEM In-Line calibrations) and a MAP output

I cannot find out how to custom make the sensor calibrations to match what AEM offers in the set up manual for the Failsafe(p.17)

Wideband Failsafe Gauge PDF

What looks to be the closest setting I found was the Mopar 3 bar map sensor calibration.

If anybody knows how I can calibrate the sensor myself, please let me know.

Damn this is hard, but I'm sure it's well worth it. Is this the first FC using the EMS-4 ???

P.S. I've been searching for a Base map for the EMS but have not come across anything. Maybe I'm using incorrect key words when I search...

 

Looking forward to hearing your updates, Ruddy.

 

MAP sensor options are found under Display > Display Explorer > Setup > Sensors > Manifold Pressure Sensor > Options. This does not give you a sensor cal table to modify. This is how AEM calibrates its MAP sensors. You can try contacting AEM directly. They will have the needed information to calibrate the MAP sensor.

As a side note I don't know how much AEM will recommend using the FSWB's analog output for the EMS-4 MAP sensor input. When talking to them in the past they don't even recommend their brass MAP sensors.

For a base map you will most likely be on your own. Limited inputs and outputs makes setting up the base cal really easy. It will be easier then getting a base map from someone else, hoping the outputs are the same or having to go back through their work making sure everything is correct. These are universal systems and there is no common wiring(GPIO) for them. Each person can make their own setup.

EB Turbo

 

Thanks for the input/tips EB, I'll be hitting up AEM then and see what they think about using the FSWB for the MAP output. If anything I might try to figure out a way to get a table set up for the stock 15psi MAP sensor, or break down and buy the AEM 3.5 bar unit.

Here's the list of all of the parts I bought for my set-up:

AEM 52mm Pressure (Oil or Fuel) Digital Gauge - 30-4401
(Gotta keep on eye on that Fuel, don't want to lose pressure like Kyle Mohan :o )

AEM AIT Sensor - 30-2010
(Hoping I can drill and tap the original hole on the TB Inlet)

AEM Boost Control Solenoid - 30-2400

AEM EMS-4 96in Lead Harness - 30-2905-96
(Turn up the boost)

AEM EMS-4 - 30-6905

AEM One Eighth Inch PTF Temperature Sensor Kit - 30-2012
(Coolant temp sensor)

AEM Universal Fuel Pressure Regulator - 25-302BK
(A lot of people said go with the Aeromotive but this should work just as well)

AEM Wideband Failsafe Gauge - 30-4900
(Cut the boost!)

AutoMeter M12x1.5 Male to One Eighth Inch NPT - 2277
(Thread adapter for the coolant temp sensor)

DeatschWerks 65c (Compact In-Tank Fuel Pump w/ Clips) (Universal) - 9-652-1000

DeatschWerks 700cc Top Feed Injectors (NA, NB Miata) - 22S-00-0700-4
(Direct fit for the FC, well except for the Connectors of course)

DeatschWerks Injector Clips x4 (Sumitomo Top Feed) - CONN-SUMITOMOx's 4
(Wired in)

I'll be doing some research to see if the MAP output from the Failsafe will work or if I need to get the AEM sensor itself.

 

It will work but it is not recommended. The brass sensors are slow and because the sensor feed the gauge, then the gauge converts the Map signal to 0-5v output, then the 0-5v output goes to the EMS-4, It just takes too long.

EB Turbo

 

So I got a crazy fast response on the AEM forums regarding the MAP output from the FSWB. And sure enough its not recommended. It's should basically work but there might be some driveability issues due to the fact that there will be a bit of delay from the cushion of air between the manifold and the gauge.

I'll probably be ordering the MAP sensor later today and hopefully my parts will come trough pretty soon.

Once that's handled, I still need to figure out how to set up the crank angle sensor signal and how to stage the ignition coils. FML.