AFC-SplitSecond PSC1 Map Library

[Wagonbacker9]

5. They're running off the shelf tunes because they're lazy and anything is better than stock

(like me! LOL)

 

[MyGrind69]

5. They're running off the shelf tunes because they're lazy and anything is better than stock

(like me! LOL)

same here most the time : )

 

[Sport23]

<< Is to lazy to even install his SSAFC

 

[MP3Performance]

I got a question hoping someone can answer. Why is it that everyone says to set the PWM mode to "Pressure 0 to 30 Psi/3 vdc FS". I understand the pressure part, but I assume the /3 vdc FS part is 3 volts for the maf. Why not put the it to "Pressure 0 to 30 Psi/5 vdc FS" since we have a 5v maf?

The reason I am asking this is that I am maxing out my MAF at 5psi, and from the data logs its when the Table A goes to 3v. Keep in mind that I have an NA ecu, and from what I have read it is calibrated different then the MSP ecu.

 

[Ricktalife]

Well every MP3 owner that went turbo has switched to the MSP ecu. I don't know the exact differences but quite simply the MSP ecu was meant for a turbo. The MP3 was not.

 

[Laser Blue]

I got a question hoping someone can answer. Why is it that everyone says to set the PWM mode to "Pressure 0 to 30 Psi/3 vdc FS". I understand the pressure part, but I assume the /3 vdc FS part is 3 volts for the maf. Why not put the it to "Pressure 0 to 30 Psi/5 vdc FS" since we have a 5v maf?

The reason I am asking this is that I am maxing out my MAF at 5psi, and from the data logs its when the Table A goes to 3v. Keep in mind that I have an NA ecu, and from what I have read it is calibrated different then the MSP ecu.

I don't have the answer, but it seems like a great question. As far as I know, the maf is 5vdc regardless of which ecu you run. I'll be watching the posts to see the answers from those who've been tuning their SSAFC's longest.

 

[xDJ DUBx]

Idk but the mp3 ecu isn't just a na ecu, it has advanced timing, could this cause an issue?

 

[Wagonbacker9]

Idk but the mp3 ecu isn't just a na ecu, it has advanced timing, could this cause an issue?

unrelated to the topic at hand, but yes, seeing as that map isn't designed for boost at all.

 

[xDJ DUBx]

Yea, I wasn't sure if it would contribute to that problem but I figured I'd throw it out there.

 

[Ricktalife]

Idk but the mp3 ecu isn't just a na ecu, it has advanced timing, could this cause an issue?

I could be wrong, but I think it is actually beneficial for us to advance the timing.

 

[Wagonbacker9]

I could be wrong, but I think it is actually beneficial for us to advance the timing.

to a point, yes, if you detonate, definitely not. lol

 

[MP3Performance]

Well every MP3 owner that went turbo has switched to the MSP ecu. I don't know the exact differences but quite simply the MSP ecu was meant for a turbo. The MP3 was not.

I am running the ssafc with the MP3 ecu because I have a supercharger, not turbo(sun), but I understand what you mean. I want to keep the stock ecu because I can run the supercharger on/off with a switch, but if I get get a MSP ecu it will probably run like crap when the SC is turned off.

I only boost up to 5psi so the advanced timing has not/should not be too much of a problem. If I was to run anything more I would probably change the ecu out. I have seen a number of other cars advance timing a bit when running low boost in order to get a few extra hp and they had no consequences (only for low boost). I have tuned the map starting at 0psi, and everything runs great and I have have no problems with detonation/hesitation/misfires/pinging etc...

The only problem is that when I rev to about 6000rpm with SC on, the check engine light comes on, and the code is for too high maf signal. I have read other post on here about the MAF signal being maxed out after it gets altered by the ssafc, but this seem to max out way too early. Plus I do not get fuel cut as others have in the past, this is what leads me to think that the setting is incorrect. As I stated earlier, the Table A (which shows altered fuel/maf) goes to 3.0v, and that is when the check engine turns on, but it seams it should go to 5.0v. MSP people might not have this problem because the MSP ecu calculates the voltage differently, so they may not even reach the 3v limit.

I have to say that the instructions with the ssafc are not the best at explaining all the other options that come with it or what they clearly do.

 

[Wagonbacker9]

how do your AF ratios look when you're getting that CEL could you lean it out any more? this would get you a lower maf voltage to the ECU, and is really the only way to fix the issue, otherwise I think you're due for an injector upgrade and and WHOLE new map..

 

[Jaysanooch]

I got a question hoping someone can answer. Why is it that everyone says to set the PWM mode to "Pressure 0 to 30 Psi/3 vdc FS". I understand the pressure part, but I assume the /3 vdc FS part is 3 volts for the maf. Why not put the it to "Pressure 0 to 30 Psi/5 vdc FS" since we have a 5v maf?

The reason I am asking this is that I am maxing out my MAF at 5psi, and from the data logs its when the Table A goes to 3v. Keep in mind that I have an NA ecu, and from what I have read it is calibrated different then the MSP ecu.

You bring up a good point I've been asking myself for awhile. I was experiencing fuel cut as soon as the winter weather hit and couldn't seem to get a straight answer on why. All I kept reading was..."you shouldn't be getting fuel cut", "the afc acts like an fuel cut defender", "you can tune it out" etc etc. But how? I didn't bother much longer and installed a JoeP FCD...WHICH IS NOT RECOMMENDED btw.

Anyway..even though my car ran fine with the FCD, I still worried and recently, I decided to remove it and change the setting as you mentioned from 0 to 30psi/3vdc to 0 to 30psi/5vdc. So far so good...I haven't experienced fuel cut but the weather has gotten a little warmer.

 

[JMKOOPA]

I am 99% sure that 440's are the largest injectors that the SS AFC can handle.

Incorrect, I am running 565 pinks.

 

[Ricktalife]

Incorrect, I am running 565 pinks.

I could swear I saw 440's max on PG or the SS website...but of course I can't find it anymore.

So my car started freaking out again when I got home today. Probably because I got the FMIC now and still not even a basic tune. There is a local shop that has a dyno, but I feel silly paying hundreds of dollars when I can do it myself. I still haven't figured out this whole auxiliary input feature to datalog from my wideband. I hope I tapped the right wire on my ECU since there was 4 different choices (makes sense with 4 auxiliary inputs on the AFC). Can anybody tell me exactly how to set these coefficients so I can datalog? I don't want to just throw a random number in there and get the wrong readings.

 

[Wagonbacker9]

you can't really datalog a narrow band O2, and the 4 wires on the AFC are for 4 different inputs.

 

[Ricktalife]

you can't really datalog a narrow band O2, and the 4 wires on the AFC are for 4 different inputs.

I have a wideband, and I understand the AFC uses 1 wire for each input. I was wondering if I tapped into the right wire on my ECU harness.

 

[Wagonbacker9]

what are you tapping into the ECU for though? if you have a wideband, that output gets plugged into the AFC's input, then you datalog through the AFC.

 

[Ricktalife]

what are you tapping into the ECU for though? if you have a wideband, that output gets plugged into the AFC's input, then you datalog through the AFC.

LOL I'm totally confused on this s*** but this is what I was following:

http://splitsec.com/technotes/Setting_up_Auxiliary_inputs_in_R4.pdf

edit: Nevermind that's not what I followed but probably would help me out lol.