AFC-SplitSecond PSC1 Map Library

[Ricktalife]

I'll try that thanks.

 

[BadBandar]

Bandar I would definitely try out Jays summer map, it is perfectly safe to run I tested it myself with my FMIC. Only downside I've noticed is that the AFR's are a little wacky when you first turn the car on, but 1 or 2 throttle blips will even it out. It seems like a nice base map.

So i tried his map and the car runs good. Healthy strong. Only thing i notice is that from a stop and u gun it i get lots of hesitation everytime i shift. Also, I still get a really rich reading at WOT. But this tune is by far the best i have tried out. I just need a little tweaks and itll be good. I didnt have the idle issue tho.

 

[theEZV]

hmmm. good stuff guys. i might try jay's summer map too.

 

[SpeedAdiction20]

I need some consistent warm weather so I can finally get my tune set lol.. it's driving me nuts

 

[Jaysanooch]

So i was comparing ur tune to the superstockmap. So the lower u go the leaner the system gets? like, 9.7->9.6->9.5. Im thinking i might try ur summer tune. Its pretty straight forward.

Ya the msp ECU dumps alot of fuel so thats the idea. You lean it out gradually to keep things smooth.

Bandar I would definitely try out Jays summer map, it is perfectly safe to run I tested it myself with my FMIC. Only downside I've noticed is that the AFR's are a little wacky when you first turn the car on, but 1 or 2 throttle blips will even it out. It seems like a nice base map.

That idle issue wouldn't be related to the map since I don't touch idle and shouldn't. I get that once in awhile and like speed mentioned..either play it out or blip the throttle but I wouldn't worry since there so little load the motor at idle.

So i tried his map and the car runs good. Healthy strong. Only thing i notice is that from a stop and u gun it i get lots of hesitation everytime i shift. Also, I still get a really rich reading at WOT. But this tune is by far the best i have tried out. I just need a little tweaks and itll be good. I didnt have the idle issue tho.

Cool..glad it's workin for you. The hesitation is weird...might be something else. After you spike, what does your boost settle at? Does it stay rich all the way to redline?

See that just a crazy example of how much the ECU dumps fuel...you will definately need to locate where your boost settles at on the AFC fuel map and adjust it. If you give me play by play details (via pm)...I can adjust the map for you.

To be honest guys...I made my map sitting in my living room. I do take mental notes of my AFR's in different situation before and I go home and replay it from memory and make the adjustments.

If you look at the map...pay attention to the diagonal/linear way I add fuel. It's not perfect but it's safe that way. When I notice a spot that is lean or rich, I'll +- by .1 the complete diagonal column and 9 times outa 10 it fixes it. I gave up on tuning each cell individually...its just impossible with gaps of 500rpm. Throttle position plays a huge part also...we dont have this option so that makes it even more difficult.

 

[BadBandar]

^^ill go out for a drive tomorrow and ill let u know what i happened. Ill try taking a small video if that could help. My boost is holding at 6psi tho. Ill throw the colder plugs back in.

 

[Ricktalife]

Yea I'm stupid and shouldn't have mentioned the idle it was just coincidence since my old stock fans were dying and now that I have my new slim fans I haven't noticed any problems.

Remember bandar it's just a base map so it requires some tuning but I think it is a great start for us.

 

[RX7FD]

Hey Guys,

I am new to this Split Second tuning and I am confused. With an Apexi SAFC if you have larger injectors then stock you would lean out what the ECU seas because the ECU controls pulse width and with larger injectors pulsing the same as smaller ones you would be getting loads more fuel then you need. However looking over these maps even the 440cc maps have a 10 (for the most part) across the board in vac.. How does that work? Also in these maps non of them seem to have any timing adjustments?

 

[Ricktalife]

Well this thread is for the Split Second Air/Fuel controller. There is a version with timing capabilities but it is not really mentioned that much in this thread. Also, most if not all of the maps posted on here are just base maps with a simple tune, so you can take them and suit them to your own needs.

 

[RX7FD]

Well this thread is for the Split Second Air/Fuel controller. There is a version with timing capabilities but it is not really mentioned that much in this thread. Also, most if not all of the maps posted on here are just base maps with a simple tune, so you can take them and suit them to your own needs.

gotcha I have the FTC1 (Does timing)... Even though these are base maps I don't understand how idle can be anywhere near where it should be unless there is somewhere you can input your injector size?

 

[SpeedAdiction20]

ya, howd you work out Split Second AFC tuning with Apexi AFC?.. but ya ditto what Rictalife said

EDIT: saw your post before I posted it, lol but ya larger injectors for the MSP during idle and stuff doesn't run that well from what I have seen from my brother's car (but he also has the high flow fuel rail so maybe that might have to do with something) but from all the people that have them, the 440cc injectors on stock ecu out of boost isn't that big of a difference for the ECU to control, I dono how it does it, but it just regulates it well enough for the change in injectors

 

[Ricktalife]

gotcha I have the FTC1 (Does timing)... Even though these are base maps I don't understand how idle can be anywhere near where it should be unless there is somewhere you can input your injector size?

Well when you see 10's on the map, it means the ECU is controlling the signal entirely. When you see different values either lesser or greater than 10, the ECU signal is being altered by the Split Second unit.

 

[RX7FD]

ya, howd you work out Split Second AFC tuning with Apexi AFC?.. but ya ditto what Rictalife said

Sorry that was just a comparison.. Like I said I am new to SS AFC.

Ok let me brake it down more so maybe I make more sense.

Lets say that a stock MSP stock Injector flows 1.5 lb's of fuel per second (Totally made up number for ease of understanding)
and lets say that the 440cc injectors flow 2.0 lb's of fuel per second

If you you set the SS AFC to not change anything that the maf is reading (or keeping it a 10 across the board in vacuum) then theoretically you would be getting 1/4th to much fuel at any given point because the computer will say open this injector for 1 second thinking it is going to get 1.5lb of fuel and instead will recieve 2.0 lb's... Does that make sense?

Is there a way to set what size injectors you have in the R4 software before you start or does the computer self compensate for the extra cc's the larger injectors have?

Or am I completely crazy and should just start with a 440cc map and just mess with it from there even though it makes no sense to me lol.

 

[RX7FD]

ya, howd you work out Split Second AFC tuning with Apexi AFC?.. but ya ditto what Rictalife said

EDIT: saw your post before I posted it, lol but ya larger injectors for the MSP during idle and stuff doesn't run that well from what I have seen from my brother's car (but he also has the high flow fuel rail so maybe that might have to do with something) but from all the people that have them, the 440cc injectors on stock ecu out of boost isn't that big of a difference for the ECU to control, I dono how it does it, but it just regulates it well enough for the change in injectors

Gotcha that is what I was wondering. So the stock ECU seems to compensate for 440cc injectors at idle by itself.

Thank you very much!!

 

[SpeedAdiction20]

ya in vac, you could try to tune the whole thing and use one of those diagnostic tools that tells you how close to .. I dono something you are, it's on the first page for the U-Tune article is what I am trying to get at, but ya out of boost your better off just not doing anything, and for some reason the car seems to be able to work with the 440s without to much problems if any from what I have heard, but as far as in boost, start with the 440cc map and go from there.. I guess since you have to V1 you can't datalog which is too bad, but ya use the wideband and go ahead and tune it from there

Edit: lol ya I seem to be pretty slow on the posting, I also just spent around 20-30 hours the last 2-3days working on a 13page research paper ll, so my brain is gone (braindead(blowup)

 

[Sport23]

I think that the reason you don't have to tune at idle is because the car stays in closed loop. It monitors the narrow band O2 sensor and adjust the long and short term fuel trim (injector pulse width) until the O2 reading is in the desired range. In other words the factory ECU will learn the proper idle as long as you don't go too crazy with the injector size.

 

[SpeedAdiction20]

^^^ ya that's what I was thinking, I had takin out my brother's 440cc injectors when I took out the unichip because it was idling like crap, but now I can smell gas although I know I altered the brackets on the (I think Perrin Fuel rail) so that the stocks sit in there tight, but if I can get the 440cc back in there and hopefully the idle will be good now

 

[RX7FD]

I think that the reason you don't have to tune at idle is because the car stays in closed loop. It monitors the narrow band O2 sensor and adjust the long and short term fuel trim (injector pulse width) until the O2 reading is in the desired range. In other words the factory ECU will learn the proper idle as long as you don't go too crazy with the injector size.

Yeah that is what it has to be.. on other cars when the fuel trims get out of wack they are way way harder to get the car running well.

 

[MSPBrett]

i still have my ssafc, not installed yet and reading throught this thread has me freaked out to install it, i feel like it will lead to more issues but its the only way to get more fuel for more power. ...

 

[Wagonbacker9]

it only leads to issues if you do it wrong. be thorough and careful, you'll be fine.