Spyder apexi SAFC tuning

[red4101]

I have a 97 Spyder GST with 550 cc injectors, Aeromotive FPR, AEM uego wideband , big 16g, HKS boost controller, upgraded intercooler, and Greddy RS BOV.

My buddy told me to see if anyone could help us with the tuning of the SAFC.

 

[GsXtC21]

If your not very familiar with tuning your best bet would be to find a reputable shop local to you who knows what their doing to get your car tuned... Remember, tuning is the single most important thing you can do in terms of how your car will run and last you so please dont cheap out on tuning...

 

[-TunedDSM-]

http://www.dsmtuners.com/forums/articles-tuning-ecu/58403-definitive-piggyback-tuning-guide.html

 

[Kokomoguy30]

It really helps if you have a data logger. I have a Palm IIIe from obdloggers. I don't really use it much now cause I have DSMLink but it works great.

One thing you should do is to set your base numbers to -18% because your injectors are about 18% bigger than stock. Set you low to high crossover to 69%/70% because there is where we go closed to open loop.

If I can find the CD for the obdlogger I might be able to part with it but as of right now I don't have a copy of the software to send to anyone so it would be about useless if the batteries die. Then Palm mem gets wiped if the batteries are dead.

 

[red4101]

cool bro im sure i could find the software for it somewhere let me know whats up my buddy is the one tuning it im not sure if he has a data logger or not he just wants me to get some info

 

[bboyalan]

I used these instructions for street tuning from Team3S/DSMTalk. Good luck!

 

[Kokomoguy30]

actually I have been looking for a copy of the software online and cant find it anywhere but I am still trying to find the disk here. I know i have it just cant remember where i put the d@mn thing!! The part you have to have is the obd II to serial adaptor. If you are interested in it I will start looking harder to find the disk. Maybe we can work out a deal on it.

 

[red4101]

sure bro what kind of deal did you have in mind

 

[JayRolla]

It really helps if you have a data logger. I have a palm IIIe from odbloggers. I dont really use it much now cause I have dsmlink but it works great. One thing you should do is to set your base numbers to -18% because your injectors are about 18% bigger than stock. Set you low to high crossover to 69%/70% because there is where we go closed to open loop. If I can find the cd for the obdlogger I might be able to part with it but as of right now I dont havs a copy of the software to send to anyone so it wouls be about uslesss if the batts die. then mem gets wiped if the batts are dead.

We dont cross over only at 70% throttle. It depends on airflow, rpms, throttle. Not just the postition of throttle.

You will have to play around with the settings to get a good mid AFR. I ended up with 20% 70% to get the best tune. What sucks about the safc is to make the mid afr it goes inbetween the hi and lo settings so its never dead on. Usually half throttle in boost is real rich when cruise and WOT are perfect.

Read that manual and follow it. Get a data logger and WBO2 so you can read your AFR and fully tune the car.

 

[Kokomoguy30]

Ok I was just going by the info that came with the logger that I have. It had an article about how to tune a SAFC on a dsm and that was their suggestion. I will look for the cd for that logger this week. PM me and we can talk about price.

 

[JayRolla]

I agree with that. Some people say thats the best way, but when I tried it, it didnt do too well.

 

[giovanniv]

I used these instructions for street tuning from Team3S/DSMTalk. Good luck!

Sorry to bring back such an old thread but I was having problems tuning my car with 550's so I thought I would just ask in this thread instead. I was looking at your link that you posted up and they made things so much simpler than everything else but my question is, would their numbers be the same as ours since they are tuning a 3000gt and a stealth? Like I'm talking about the baseline corrections they made with the bigger injectors about the 30% high 35% low.

 

[bboyalan]

That is a great question. The short answer is simply no because the percentage adjustments are based off of stock injector size.

For example, 3/S has 360cc from the factory. When we upgrade to 450cc DSM injectors, we are adding 90cc's more. 90/360 = 1/4 = -25% adjustment [low] and -20% [high] for rough, conservative baselines. Alternatively, 450/360 = 125%. This is all assuming that you are running 3bar base fuel pressure. Personally, I am running 53bpsi w/ my blacktop 450cc's and they are calculated to flow ~500cc's now regulated with an AEM AFPR and backed by a hotwired Walbro GSS341 255lph.

It is surprising how much similarity there is between the DSM's and 3/S especially 1G's .... i.e. Scanmaster, MAF-T, MMCd, etc.

 

[gofer]

Sorry to bring back such an old thread but I was having problems tuning my car with 550's so I thought I would just ask in this thread instead. I was looking at your link that you posted up and they made things so much simpler than everything else but my question is, would their numbers be the same as ours since they are tuning a 3000gt and a stealth? Like I'm talking about the baseline corrections they made with the bigger injectors about the 30% high 35% low.

bboyalan helped with the 3/S question but i think you should REALLY update your profiles mod info if you need some help with performance/tuning applications.

Apexi Super AFC For The Eclipse/EVO
RRE's Super AFC Setting and Adjustment Tips

heres what i used to get my cars base settings... if you go to the bottom you might be able to find a cars settings with similar mods and go from there.
i ran rich but someone with some tuning knowledge was able to pull some fuel out where i needed it so it wouldn't bog.

 

[bboyalan]

His "baseline" correction for 550's would be ~22%. The real correct way to tune for your own car's setup will require you to datalog and adjust accordingly.

 

[giovanniv]

Sorry guys I filled in my mods in my profile. As for the tuning, I just want a baseline on where to start tuning cause I have read countless threads and of course each one says something different. So let me get this straight. Start off with a -22% low and around a -17% high and work my way from there?

 

[bboyalan]

Yes, that should suffice until you start fine-tuning. It is particularly important to log during WOT since the ECU can somewhat take care of itself in closed-loop. BTW, what version of EvoScan are you using? 2.6? 2.7 beta? I fiddled with it for a while, but I ended up using another laptop-based logging software linked with my Scanmaster 3.

More than likely though, you will probably end up pulling fuel in your low settings. The high settings will vary.

//edit// I noticed that you are still on the T-25. 14 or 15psi? Regardless, you can pull fuel safely in your high settings because these cars run rich from the factory and you won't be holding much to redline anyway. You may also notice some slightly more aggressive timing advancement with the 550's depending on your IDC's and such.

 

[giovanniv]

Ok and another question that I have is, I read the 2 links above and it talks about when I have my 100% reading down that I have to like richen it up another 10% or something like that? What is that about?

And for evoscan I am using evoscan 2.3 because the newest version of evoscan for some reason doesn't connect to my 2g?

The T-25 that I am running is at 15-16lbs and of course I won't be shifting at redline or anywhere near because the turbo obviously falls on it's face after 6000rpms

 

[giovanniv]

No one?

 

[fst_4g63]

As for the up 10 % I don't know, but are you creeping to 15 or 16? 15 pretty much maxes a t-25 unless you like hot air.

Darren

 

[giovanniv]

Ok hold on I am about to start tuning finally and I just want to get it straight. I should start at a positive 22% or a negative 22%? Also just to be on the safe side, when I add percentage I am richening the mixture correct?

^^ and no i'm not creeping I have it set to 15-16lbs....

 

[GsXtC21]

Ok hold on I am about to start tuning finally and I just want to get it straight. I should start at a positive 22% or a negative 22%? Also just to be on the safe side, when I add percentage I am richening the mixture correct?

^^ and no i'm not creeping I have it set to 15-16lbs....

Good question..? Can anyone offer input please..

 

[bboyalan]

Mmm negative and yes. To make it short and sweet, it is based on MAF/load. You are essentially lying to the ECU with the airflow that is being reported. More air = more fuel and less air = less fuel.

In regards to the extra 10%, I have only heard of adding an extra 10% for starting when you gut your stock MAS. You would do this because you now have more air flowing that is not being metered. This would cause a lean mixture without any other adjustment. On the bright side, this gives you a little more headroom for fuel cut.

Someone feel free to correct me if I am wrong

 

[Rikuu99]

I have a 97 Spyder GST with 550 cc injectors, Aeromotive FPR, AEM uego wideband , big 16g, HKS boost controller, upgraded intercooler, and Greddy RS BOV.

My buddy told me to see if anyone could help us with the tuning of the SAFC.

Did you ever figure this out ? I’m running Same setup - hitting fuel cut now- long story - looking to use a safc for now - curious what you used

 

[pagosa dsm]

I have a 92 Talon. I live at 9000 feet. my setup is the old dial AFC. I have 550 injectors with a Holset hx35. I'm running up to 25 pounds of boost with no problems.