How easy would it be to repin my 92+ Computer to a 90-91 pinout for use with an AEM 1120 computer instead of the 1121? Reason I ask is that I may have an opportunity to snag an 1120 for much cheaper than the current going $1500-1600. If it's not a total rectal tear to do I would probably go this route in lieu of paying full price for a 1121 AEM EMS.
Swap Guys, ECU Question, AEM EMS Specific Related - 6G Celicas Forums
I actually had to repin my 91 ecu to an mr2 93-95 ems. it was just a few wires, maybe 10.
heres what i had to do anyways.
made that to help me visually while doing it.
This post has been edited by x_itchy_b_x: Feb 19, 2008 - 1:28 PM
heres what i had to do anyways.
made that to help me visually while doing it.
This post has been edited by x_itchy_b_x: Feb 19, 2008 - 1:28 PM
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your ecu has a serial on it and find the pinout for that serial.
get the aem pinout and make everything match. It was easier to just cut and solder the wires rather than relocate pins. unless you had to put a wire where there previously wasn't one. It's nothing to be afraid of though.
http://mr2oc.com/showthread.php?t=157628
This post has been edited by x_itchy_b_x: Feb 19, 2008 - 1:19 PM
get the aem pinout and make everything match. It was easier to just cut and solder the wires rather than relocate pins. unless you had to put a wire where there previously wasn't one. It's nothing to be afraid of though.
http://mr2oc.com/showthread.php?t=157628
This post has been edited by x_itchy_b_x: Feb 19, 2008 - 1:19 PM
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Good deal. I will probably try to snag this one then. Time for an upgrade. I'm so sick of backfiring and sooty exhaust, not having complete control of the motor, and not being able to fully correct the dang thing.
I knew someone here did what I'm looking at, just couldn't remember who. Itchy, did you ditch the AFM and use a 3Bar map sensor on yours?
I knew someone here did what I'm looking at, just couldn't remember who. Itchy, did you ditch the AFM and use a 3Bar map sensor on yours?
indeed I did. I'm using a GM 3bar map along with a GM air intake temp AIT sensor.
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Nice!
How about a wide band? Did you use one and hook it up to the AEM? Doesn't the AEM have an "auto" tune where you can set a target A/F Ratio?
*Edit* I just noticed that you converted your EARLY ecu to the LATE ecu. I take it the charts above would allow me to reverse engineer this, I.E. I just need to find a pinout for my ECU then make it look like your top graph above?
This post has been edited by Fastbird: Feb 20, 2008 - 5:09 PM
QUOTE(x_itchy_b_x @ Feb 20, 2008 - 9:19 AM) [snapback]643584[/snapback]
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indeed I did. I'm using a GM 3bar map along with a GM air intake temp AIT sensor.
indeed I did. I'm using a GM 3bar map along with a GM air intake temp AIT sensor.
Nice!
How about a wide band? Did you use one and hook it up to the AEM? Doesn't the AEM have an "auto" tune where you can set a target A/F Ratio?
*Edit* I just noticed that you converted your EARLY ecu to the LATE ecu. I take it the charts above would allow me to reverse engineer this, I.E. I just need to find a pinout for my ECU then make it look like your top graph above?
This post has been edited by Fastbird: Feb 20, 2008 - 5:09 PM
The aem has some basic autotune features... but you really will need to pay someone to tune the car from the ground up.
I would also throw in some 550cc injectors in there. That way, most of your base maps would be tuned for 550s, and then you can make minor adjustments to the WOT maps if you ever upgrade to a bigger turbo, instead of having to redo everything later on.
I would also throw in some 550cc injectors in there. That way, most of your base maps would be tuned for 550s, and then you can make minor adjustments to the WOT maps if you ever upgrade to a bigger turbo, instead of having to redo everything later on.
15PSI - 30MPG - Megasquirt Tuned
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I'll be doing most of teh tuning myself. Just would use the auto tune to get the VE tables dialed in close so I could fine tune, rather than try to come up with a map from scratch.
Injectors are staying as-is for now. I can't drop too much money on the car if I go this way. I still have the T/A project in full swing to finish up by summers end for the fall racing season.
QUOTE(lagos @ Feb 20, 2008 - 6:13 PM) [snapback]643762[/snapback]
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The aem has some basic autotune features... but you really will need to pay someone to tune the car from the ground up.
I would also throw in some 550cc injectors in there. That way, most of your base maps would be tuned for 550s, and then you can make minor adjustments to the WOT maps if you ever upgrade to a bigger turbo, instead of having to redo everything later on.
The aem has some basic autotune features... but you really will need to pay someone to tune the car from the ground up.
I would also throw in some 550cc injectors in there. That way, most of your base maps would be tuned for 550s, and then you can make minor adjustments to the WOT maps if you ever upgrade to a bigger turbo, instead of having to redo everything later on.
I'll be doing most of teh tuning myself. Just would use the auto tune to get the VE tables dialed in close so I could fine tune, rather than try to come up with a map from scratch.
Injectors are staying as-is for now. I can't drop too much money on the car if I go this way. I still have the T/A project in full swing to finish up by summers end for the fall racing season.
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problem with that is the AEM basemaps dont have any of the cold start enrichment tables done, or any of the compensation maps, which will greatly affect driveability.
theyre really only ment as a "limp it over to your tuner" type of deal.
QUOTE(Fastbird @ Feb 20, 2008 - 6:47 PM) [snapback]643794[/snapback]
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I'll be doing most of teh tuning myself. Just would use the auto tune to get the VE tables dialed in close so I could fine tune, rather than try to come up with a map from scratch.
Injectors are staying as-is for now. I can't drop too much money on the car if I go this way. I still have the T/A project in full swing to finish up by summers end for the fall racing season.
>
QUOTE(lagos @ Feb 20, 2008 - 6:13 PM) [snapback]643762[/snapback]
>
The aem has some basic autotune features... but you really will need to pay someone to tune the car from the ground up.
I would also throw in some 550cc injectors in there. That way, most of your base maps would be tuned for 550s, and then you can make minor adjustments to the WOT maps if you ever upgrade to a bigger turbo, instead of having to redo everything later on.
The aem has some basic autotune features... but you really will need to pay someone to tune the car from the ground up.
I would also throw in some 550cc injectors in there. That way, most of your base maps would be tuned for 550s, and then you can make minor adjustments to the WOT maps if you ever upgrade to a bigger turbo, instead of having to redo everything later on.
I'll be doing most of teh tuning myself. Just would use the auto tune to get the VE tables dialed in close so I could fine tune, rather than try to come up with a map from scratch.
Injectors are staying as-is for now. I can't drop too much money on the car if I go this way. I still have the T/A project in full swing to finish up by summers end for the fall racing season.
problem with that is the AEM basemaps dont have any of the cold start enrichment tables done, or any of the compensation maps, which will greatly affect driveability.
theyre really only ment as a "limp it over to your tuner" type of deal.
Former Team 5SFTE pro member ;)13.6@108MPH, 5SFTE Powered
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You guys aren't giving me enough credit here. I'm not an idiot when it comes to tuning. I've got enough knowledge to competently tune my own vehicles. Once you've spent hours upon hours data logging and then tweaking VE tables for a Speed Density tune, come talk to me. Until then, let me ask my little questions about the AEM for the guys that have it and quit trying to tell me that I need to get it to someone for tuning, ok thanks. I appreciate the inputs, I really do, but please give me some credit.
QUOTE(presure2 @ Feb 20, 2008 - 8:22 PM) [snapback]643805[/snapback]
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problem with that is the AEM basemaps dont have any of the cold start enrichment tables done, or any of the compensation maps, which will greatly affect driveability.
theyre really only ment as a "limp it over to your tuner" type of deal.
>
QUOTE(Fastbird @ Feb 20, 2008 - 6:47 PM) [snapback]643794[/snapback]
>
>
I'll be doing most of teh tuning myself. Just would use the auto tune to get the VE tables dialed in close so I could fine tune, rather than try to come up with a map from scratch.
Injectors are staying as-is for now. I can't drop too much money on the car if I go this way. I still have the T/A project in full swing to finish up by summers end for the fall racing season.
>
QUOTE(lagos @ Feb 20, 2008 - 6:13 PM) [snapback]643762[/snapback]
>
The aem has some basic autotune features... but you really will need to pay someone to tune the car from the ground up.
I would also throw in some 550cc injectors in there. That way, most of your base maps would be tuned for 550s, and then you can make minor adjustments to the WOT maps if you ever upgrade to a bigger turbo, instead of having to redo everything later on.
The aem has some basic autotune features... but you really will need to pay someone to tune the car from the ground up.
I would also throw in some 550cc injectors in there. That way, most of your base maps would be tuned for 550s, and then you can make minor adjustments to the WOT maps if you ever upgrade to a bigger turbo, instead of having to redo everything later on.
I'll be doing most of teh tuning myself. Just would use the auto tune to get the VE tables dialed in close so I could fine tune, rather than try to come up with a map from scratch.
Injectors are staying as-is for now. I can't drop too much money on the car if I go this way. I still have the T/A project in full swing to finish up by summers end for the fall racing season.
problem with that is the AEM basemaps dont have any of the cold start enrichment tables done, or any of the compensation maps, which will greatly affect driveability.
theyre really only ment as a "limp it over to your tuner" type of deal.
You guys aren't giving me enough credit here. I'm not an idiot when it comes to tuning. I've got enough knowledge to competently tune my own vehicles. Once you've spent hours upon hours data logging and then tweaking VE tables for a Speed Density tune, come talk to me. Until then, let me ask my little questions about the AEM for the guys that have it and quit trying to tell me that I need to get it to someone for tuning, ok thanks. I appreciate the inputs, I really do, but please give me some credit.
Its not an issue of credit. If you got the skill then go for it.
What presure2 and I were trying to say, is that the hard part of tuning an ems is all the daily driving, part throttle, kinds of stuff. You really need to have the car on a load based dyno to get the different load points down, throttle enrichment, cold start up, etc... just to be able to have a car that drives like it does now with the stock ecu. If you can do it, then go for it! But at the very least you would need to book some dyno time, because all of that stuff is very hard to street tune to get right.
What presure2 and I were trying to say, is that the hard part of tuning an ems is all the daily driving, part throttle, kinds of stuff. You really need to have the car on a load based dyno to get the different load points down, throttle enrichment, cold start up, etc... just to be able to have a car that drives like it does now with the stock ecu. If you can do it, then go for it! But at the very least you would need to book some dyno time, because all of that stuff is very hard to street tune to get right.
15PSI - 30MPG - Megasquirt Tuned
Oh, I fully agree that the dyno is usually an integral part of the tuning process, but it's also a tool that is usually saved for the last step to fine tune your WOT stuff. The road, with real world loads, is where the majority of the tuning time and logging needs to be spent. Dyno's only simulate a real world load (save for a Mustang or Dyno Dynamics dyno), and generally a WOT road tuned car will not show as being accurate on a dyno, though it's spot on for the car itself on the road.
The questions I'm asking here are driven more for some AEM operating features from some guys with real world experience with them in a Celica. I plan to ditch the AFM, put in a 3 bar map sensor, get a wide band in it, and get to tuning. I also would like to ditch the EBC I have now in lieu of letting the AEM do the controlling.
Biggest thing I need to figure out right now is what the pinout of my computer is so I can make it look like the one that Itchy posted above. Anyone got the pinout of a 89661-2B280??????
The questions I'm asking here are driven more for some AEM operating features from some guys with real world experience with them in a Celica. I plan to ditch the AFM, put in a 3 bar map sensor, get a wide band in it, and get to tuning. I also would like to ditch the EBC I have now in lieu of letting the AEM do the controlling.
Biggest thing I need to figure out right now is what the pinout of my computer is so I can make it look like the one that Itchy posted above. Anyone got the pinout of a 89661-2B280??????
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Dude, you're my hero for that. I was just starting to get around to searching for it tonight and thought I'd check in here first. Nice find there, that's exactly what I needed. Now I just need to take your chart and that chart and color code for a 92-93 computer retro repin to a 90-91 computer and then hopefully get this 1120 AEM unit for a good deal.
This post has been edited by Fastbird: Feb 21, 2008 - 8:34 PM
QUOTE(x_itchy_b_x @ Feb 21, 2008 - 9:18 PM) [snapback]644261[/snapback]
Dude, you're my hero for that. I was just starting to get around to searching for it tonight and thought I'd check in here first. Nice find there, that's exactly what I needed. Now I just need to take your chart and that chart and color code for a 92-93 computer retro repin to a 90-91 computer and then hopefully get this 1120 AEM unit for a good deal.
This post has been edited by Fastbird: Feb 21, 2008 - 8:34 PM
Ok guys, help me out here. Above you can see my quick pinout chart. I have highlighted some blocks in red between the ST185 early computer (2nd listed) and my computer (1st listed).
Any guidance or direction for me? Remember that I'm trying to repin a LATE computer to plug into an AEM 1120 computer for an EARLY computer.
*Edit* I'm a tool. I just realized that OF COURSE my computer would resemble the late SW20 computer. But......for the repin, I still have the pins in red that don't match up with each other and I have no idea what they are and if they need to be moved or left alone, or if it's even doable.
This post has been edited by Fastbird: Feb 21, 2008 - 10:09 PM
t and te1 are the same. i remember that much. go to that link i first posted. it will show you what the abbreviations mean.
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Ok, so the T and TE1 are the same and as such, I'm good there. The OX1 and OX2 are the oxygen sensors. Being that I only have one O2 on the car, the second one could be left out and not trouble anything, especially considering the AEM will probably have the feature to turn it off.
Which only leaves the THG.......which I can't find a definition of.
Am I on the right track here to repin this thing to take the 1120 AEM ECU?
QUOTE(x_itchy_b_x @ Feb 21, 2008 - 11:17 PM) [snapback]644337[/snapback]
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t and te1 are the same. i remember that much. go to that link i first posted. it will show you what the abbreviations mean.
t and te1 are the same. i remember that much. go to that link i first posted. it will show you what the abbreviations mean.
Ok, so the T and TE1 are the same and as such, I'm good there. The OX1 and OX2 are the oxygen sensors. Being that I only have one O2 on the car, the second one could be left out and not trouble anything, especially considering the AEM will probably have the feature to turn it off.
Which only leaves the THG.......which I can't find a definition of.
Am I on the right track here to repin this thing to take the 1120 AEM ECU?
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T = check connector signal (jumper to GND to check error codes)
TE1 = check connector signal (jumper to GND to check error codes)
TE2 = check connector signal
OX = Oxygen sensor signal (before cat, single O2 motors)
OX1 = Oxygen sensor signal (before cat, dual O2 motors)
OX2 = Oxygen sensor signal (after cat, dual O2 motors)
THG = JDM exhaust gas temp switch, can be left open (shorted to ground lights warning light on dash and puts ECU in limp mode)
For your purposes:
T = TE1
OX = OX1
all others can be left disconnected
-Charlie
QUOTE(Fastbird @ Feb 21, 2008 - 7:07 PM) [snapback]644330[/snapback]
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Ok guys, help me out here. Above you can see my quick pinout chart. I have highlighted some blocks in red between the ST185 early computer (2nd listed) and my computer (1st listed).
Any guidance or direction for me? Remember that I'm trying to repin a LATE computer to plug into an AEM 1120 computer for an EARLY computer.
*Edit* I'm a tool. I just realized that OF COURSE my computer would resemble the late SW20 computer. But......for the repin, I still have the pins in red that don't match up with each other and I have no idea what they are and if they need to be moved or left alone, or if it's even doable.
I think you have the first two labeled backwards. The top one is JDM, the second one is USDMOk guys, help me out here. Above you can see my quick pinout chart. I have highlighted some blocks in red between the ST185 early computer (2nd listed) and my computer (1st listed).
Any guidance or direction for me? Remember that I'm trying to repin a LATE computer to plug into an AEM 1120 computer for an EARLY computer.
*Edit* I'm a tool. I just realized that OF COURSE my computer would resemble the late SW20 computer. But......for the repin, I still have the pins in red that don't match up with each other and I have no idea what they are and if they need to be moved or left alone, or if it's even doable.
T = check connector signal (jumper to GND to check error codes)
TE1 = check connector signal (jumper to GND to check error codes)
TE2 = check connector signal
OX = Oxygen sensor signal (before cat, single O2 motors)
OX1 = Oxygen sensor signal (before cat, dual O2 motors)
OX2 = Oxygen sensor signal (after cat, dual O2 motors)
THG = JDM exhaust gas temp switch, can be left open (shorted to ground lights warning light on dash and puts ECU in limp mode)
For your purposes:
T = TE1
OX = OX1
all others can be left disconnected
-Charlie
2003 Subaru WRX Wagon1989 Camry Alltrac LE 3S-GTE - SV25/ST205 hybrid1988 Camry Alltrac LE - BEAMS swap started
Charlie....thanks for that!!! I don't know why I labeled the early ST185 pinout as a JDM.........force of habit I guess. My computer, the top one, is definitely JDM though as it was all part of the motor swap. You gave me what I need there though, that's going to get me going. Thanks man!