AFC-SplitSecond PSC1 Map Library

[DiscreetSpeed]

By one point you mean from an afr of 11.1 to 12.1? If so thats quite a bit - mine doesnt do so much a change. -.1 in a cell does minimal for me. Maybe a .2 or so change in afr. Every car is different. Check out my map here. Very lean in comparison to the rest of the maps on the board running stock injectors. Looks more like a map for larger injectors. I run mid 11's to 12 afr. Minor bolt on mods.

 

[Alejo_NIN]

^What PSI?

 

[DiscreetSpeed]

9 psi.

 

[Sport23]

Thanks for the response. I haven't been on for I while; I'll look at your map and see how it's different from mine. How much whp @ 9psi? Do you run meth or E85?

I called Split Second and verified the settings. One of these days I'll get back out there and retune my car....

 

[719prottege]

i have a gt2871rs and wrx 440's... also turbo back exhaust, fmic. anyone have a similar set up with a decent tune?

 

[719prottege]

I think there's a map for 440's, but i think it's for a T28. It should be close though.

where is this? i need it!

 

[Sport23]

Look here and try this. Be careful, the map will still need to be fine tuned for your car.

 

[719prottege]

Thank you

 

[Alejo_NIN]

thread jack: 719prottege : is your msp wrapped?

 

[Sport23]

Np

 

[Alejo_NIN]

aarrrghh
i'm pissed.

any map i put on to start working (13 PSI on stock injectors) bogs the **** down at 0VAC.

 

[Sport23]

What is your overpressure set to?

 

[Alejo_NIN]

the **** do i know!

arrghh

ok, i'm done venting...
what is overpresure?

 

[Sport23]

In the output settings there is a tab for overpressure. You can set it to positive or negative values. Whatever value you set it to is the point that the SSAFC will force your car into open loop. I have mine set to 0.5 but you could try a negative value and then tune that area of your map. I hope that makes sense.

You can actually tune closed loop with the SSAFC but the theory is a little different. You would need to maintain 0 vac at different rpms while having someone monitor your STFT and LTFT with and OBDII scanner. Make adjustments to your map so that your LTFT and STFT add up to 0.

I know this is a pain but it really is the best way to tune a Protege with a SSAFC. Our cars carry LTFT into boost which can really throw off your tune. If you spend the time to tune all of your closed loop then tune your open loop you will have a much better tune that will vary less with changing conditions.

Let us know how it goes. I have some excel docs @ home to help that I can upload later. Also, read the U-tune article in the first post if what I wrote doesn't make sense.

GL

 

[Alejo_NIN]

In the output settings there is a tab for overpressure. You can set it to positive or negative values. Whatever value you set it to is the point that the SSAFC will force your car into open loop. I have mine set to 0.5 but you could try a negative value and then tune that area of your map. I hope that makes sense.

You can actually tune closed loop with the SSAFC but the theory is a little different. You would need to maintain 0 vac at different rpms while having someone monitor your STFT and LTFT with and OBDII scanner. Make adjustments to your map so that your LTFT and STFT add up to 0.

I know this is a pain but it really is the best way to tune a Protege with a SSAFC. Our cars carry LTFT into boost which can really throw off your tune. If you spend the time to tune all of your closed loop then tune your open loop you will have a much better tune that will vary less with changing conditions.

Let us know how it goes. I have some excel docs @ home to help that I can upload later. Also, read the U-tune article in the first post if what I wrote doesn't make sense.

GL

cannot thank you enough for taking the time to answer the quetsion
so, now that i know what overpressure is..mine is set at 1.5
probably why it is acting like s*** in low boost.

i'm just going to continue reading and if you could load those docs that'll be awesome
also, if you'd like. send the docs to my username @hotmail.com

greately appreciated!

BTW, any chance to catch up with you on facebook?

 

[Alejo_NIN]

dude, i got so much to do
so i found out why my car runs like s*** ALL the time
i really don't know what the hell i am doing
my car goes from closed loop into open loop due to system mafunction.

back to the drawing board...

 

[jdwk]

Yeah this is the main problem with piggybacks and why I threw in the towel. The piggyback can't predict when the PCM will go into open loop, and there are a variety of ways it will do so. In open loop, our cars run very rich and we usually decrease MAF voltage to lean it out. But it also runs very lean in closed loop, so in (over)boost, we override the O2 signal to trick the car into adding more fuel.

So if you are tricking the car to add fuel and then it suddenly jumps to open loop for whatever reason, it goes pig rich and it feels like someone dumped sand in the gas tank.

I know people have been using the SSAFC and achieved great results for years, but I can pretty much guarantee that if anyone with a piggyback hits a stretch of road where they have to peg the throttle for longer than 3 seconds under 4200rpms, they will be disappointed and confused as their AFRs drop below the gauge.

 

[Sport23]

jdwk. You may be right like a long stretch of road.

The SSAFC forces the 02 signal to 1V at whatever vac/boost level you set the overpressure for. When the ECU sees this it goes into open loop.

 

[Spiced MSP]

yup, had the same issues when I had the ssafc. I mean, it worked great for the most part. But on days where Im out running errands and need to be somewhere by a certain time, the car would just randomly fall on its face. When I had the time, I would do a few datalogs and adjust where needed, but it always came back. It's a good unit though, I think J noato or however you spell it is running the ftc on his built motor making some good power. But I got bored with it and sold it to another member and picked up a standalone

 

[DiscreetSpeed]

Alejo - is it leaning out or getting filthy rich? System malfunction?

The best overpressure for me has been -10 vac. I was having this issue where when the afc puts the ecu into open loop (overpressure setting) it for whatever reason leans the car out causing it to bog. So i set the overpressure in a deep vac state so if it bogs its still in vac and not hurting the engine. This only happened while at -10 or whatever pressure i had the setting at.. didnt last but the length of time i was at that setting. Its doesnt happen often i think but that may be because im not at -10 long enough to realize it. I tried even putting the overpressure at 16 psi or at 7000 rpm but somehow the dang thing would remember the previous setting and bog down at that setting. This happened even after resetting the ecu. Not an issue any longer for me. Personally if anyone is having this issue with a overpressure set while in boost even at 1.1 psi - id try putting it in vac before -5 in/hg or so.