Initial impressions of the AEM EMS

[eh?]

I previously had a PFC/datalogit/Q45 AFM set up. Only problem I had with he PFC is the lack of autotune and knock feedback.The ems addressed those issues and had the ability to run MAP. Setting up:The AEM is not truly PNP like the PFC, with the AEM you must have a laptop to upload the correct what's called a .calibration file to the unit. IF you buy the ems and want the map function, i suggest you buy the 3.5 bar sensor. There is no .cal file for the 5 bar sensor and you'd have to copy and paste the 3.5 map to the 5bar map, which, imo, is just stupid.Initial calibrations are for the TPS range and base timing, which are pluses. Software:For a DIY tuner the software is just to much. There are probably more options for fuel in AEM than there is for the PFC all together. There are options for many different sensors, you don't need AEM specific sensors. You can use an AIT from a honda or mazda for example. Startup:Start up took 4-5 cranks but started fine. RPM was high and dropped to normal like stock. It idled a bit rich for my liking, AFR's were about 10:1.

That's all for now :p

[s13_rb25det]

if u have the PFC for sale, drop me a mail to:

[email protected]

thx,

nick

[Joe]

keep us posted on how it tunes out and everything works

[krayton]

did you install a GM or other IAT (ait) sensor?

im assuming the stock maf was used to measuer that, but switching to map get rids of that. any tips that you have would help!

thanks

[silent dave]

The AEM is not truly PNP like the PFC, with the AEM you must have a laptop to upload the correct what's called a .calibration file to the unit. IF you buy the ems and want the map function, i suggest you buy the 3.5 bar sensor. There is no .cal file for the 5 bar sensor and you'd have to copy and paste the 3.5 map to the 5bar map, which, imo, is just stupid.

the aem ems is plug and play, you plug it in and start playing with it. there is no wiring required. its not plug it in and go drive it around.

and as far as saying to get the aem 3.5 bar map sensor, just run a gm 3 bar and save yourself some money. then run the hardware wizard and it will redo the fuel and ignition maps.

did you get the standard 1621 or the 1621u with the built in wideband? you said afr was around 10:1 at start up, if you have a separate wideband gauge, do you have it wired into the ems and have o2 feedback turned on?

[eh?]

[QUOTE=silent dave]

the aem ems is plug and play, you plug it in and start playing with it. there is no wiring required. its not plug it in and go drive it around.QUOTE]

Plug and play means plug in and drive, not plug in and play around. PFC is truely PNP, the aem is not. For $1600 they should have seperated the RB20,RB25 and RB26 models.

I said to get the 3.5 bar beause there is a cal made for it, running the wizard does NOT adjust the map for you. You must manually readjust the break points or copy and paste the original map to both the fuel and timing , which is stupid. ref: http://forum.aempower.com/bbs/viewtopic.php?t=8285But if i had to redo it i would buy a GM map and IAT. Krayton: I have the aem iat. I don't undertand your other question.

[quick108]

The RB26DETT, RB25DET and RB20DET are already seperated via the software (base maps). There is no need to have seperate hardware because the pinouts are the same. The R34, however, has its own P/N (30-1623).

[eh?]

The RB26DETT, RB25DET and RB20DET are already seperated via the software (base maps). There is no need to have seperate hardware because the pinouts are the same. The R34, however, has its own P/N (30-1623).

Not 100% true. Yes they have the same pin layout, but the wiring is slightly different. Example: I couldn't use the maf wiring for the map sensor, goes to pin 36 which is blank. But on an RB26 you can as that is the #2(?) maf input. But it's NOT a big deal....... just something to pick at :p .

[krayton]

i was just wondering about the ait sensor.

can you post some pics of your map and ait sensors?

[onefastrb26]

The AEM EMS is a plug and play on a stock setup car. If you want to change to speed density ( map) you need to do some wiring. Just 5 wires, no big deal. The AEM is a lot more powerful tham the PFC. And since you have all these maps to play with, it requires a lot more time spent tuning.

And if you change the map sensor from 3.5 bar to 5bar, and just readjust the change in the wizard only, that is a definite way to BLOW your engine. You have to rescale the main fuel and timing maps for the different load reading.

[eh?]

The AEM EMS is a plug and play on a stock setup car

No that is just not true. A mine's ecu is pnp, the pfc is pnp. The aem is not pnp ins the true sense of that phrase. What do you have to do when you first install? 1) upload the .cal2) sync timing3) calibrate TPS idle and WOTWhat about the PFC? turn key start?But like i said it's NOT a big deal. Just nit picking. It's expected of a higher end ecu.

[krayton]

ahh, come on. you guys are looking into it way far.

i think when aem says plug n play, they're comparing to something like haltech where you basically wire up the whole harness.

anyways, these are all little tid bits.

[sil820]

which aem ems system do u buy then?? i wanted to get an ems system for my rb20, so do i buy the rb26dett and just download the correct software?>

[krayton]

which aem ems system do u buy then?? i wanted to get an ems system for my rb20, so do i buy the rb26dett and just download the correct software?>

P/N: 30-1621(U) 1989-1998 Nissan Skyline RB26DETT 1993-1998 Nissan Skyline RB25DET 1989-1994 Nissan Skyline RB20DET

[eh?]

map sensor, can't really take a pic of the AIT.