su_be_me

I have an Apexi super air flow converter version 3.32m. and i want to know what are the recommended settings for a 2002 subaru impreza wrx, turbo charged. i dont want to **** with it and really screw something up. so if any one has any answers that would be awesome.

joejoe69

iTrader: (2)

settings to get it started, or settings to tune it? is it the safcII?

oldmansan

iTrader: (4)

I have one too, and I have a 2002 WRX. I would suggest you leave it alone. I use mine as a gauge only. I bought it before I really had done my homework. Without a wideband O2 (which I have) and some software to plot the differences you'd be making, it is far too risky.

Mine is part of my dash, and anyone who has seen my dash knows I couldn't change it if I wanted to. I would advise you sell the SAFC to someone that can use it. You're much better off with a piggyback, aftermarket ECU or reprogramming the stock ECU.

I'm making 292/297 awhp/awtq on pump and 324/338 awhp/awtq on 50/50 mix of pump and race gas on a stock 2.0 block with a VF34. I wouldn't even consider using the SAFC, and neither did my tuner, Doug, at Top Speed in Atlanta. Doug tweaked my AVC-R, but the SAFC isn't really needed and can be downright dangerous.

Just my $0.02, feel free to do what you will.

San

RallyGC

iTrader: (3)

If you suddenly want to sell it to a NA guy who can more aptly use it I would gladly take it off your hands for a reasonable price

oldmansan

iTrader: (4)

I'd sell you mine if it wouldn't leave such a huge gaping hole in my dash.

San

RallyGC

iTrader: (3)

Ha, thats what duct tape is for!

su_be_me

yes its the safcII, what are the settings to get started and after that what are the settings to tune it?

su_be_me

educate me on how it could be dangerous. im into tuning and want to learn more about it but i dont want to mess stupid unrealistic stuff for cars. if i really dont need it then i will sell it for something that works better and safer. i really like my car and i want to keep it around for a while ya know? im open to any suggestions on works better or criticism on the safcII i want to learn all i can.

RallyGC

iTrader: (3)

All the SAFC does is intercept the signal from your MAF and adjust it to change your ecu's perceived air intake. This in turn tells the injectors to adjust air flow accordingly. Since the SAFC adjusts the perceived airflow going to the ECU it allows you to adjust the predetermined fuel mixture. Basically you need to log your o2 readings find out where your running rich or lean and make the adjustments in the SAFC accordingly. Its actually a really simple device in theory, but it packs the potential to do some damage if you dont know what your doing. Do yourself a favor, sell it to me and buy an Access Port

oldmansan

iTrader: (4)

The SAFC is used to change the air/fuel ratio. This is pretty straightforward on N/A cars, but boosted cars are a bit more tricky. For instance, under light throttle with no boost, we want stoich levels (14.7 AFR). For boosted conditions we want anywhere from 10 -12 AFR, depending on how prevalent our motor is to knock) pre-ignition, quality of fuel, presence or lack of water/alcohol/meth injection, etc.

Do you have a wideband O2? Is it accurate? If you answered either of these questions with a "no", do yourself a favor and sell the SAFC. I have a wideband and still wouldn't use the SAFC. I mentioned before that my tuner didn't mess with my SAFC to change the AFRs. He did utilize the S-AFC (boost controller). Why didn't he use the SAFC? Because there are easier/better/more reliable ways to do the same thing. A piggyback, ECU reflash, etc are preferred.

You mention you are "into tuning". If so this should all be academic. Sell the SAFC and invest in a tried and proven method of tuning not only your AFRs but your timing, boost, and all other variables possible. Talk to Ryan at Vakamon, he'll take care of you.

San

RallyGC

iTrader: (3)

And then sell me an NA guy your SAFC! Come on, you know you want to do it!

joejoe69

iTrader: (2)

su be me,

it'll be safer if your car was obd1, which easier to tune with and will do anything you want it to. you have an 02 wrx, which is obd2. your car will temporarily do what you tell it, and then it'll re-learn its way back to factory settings and throw a cel at the same times for fuel trims. if you want to keep it, get a reflash with your mods first and then fine tune with the safc. using that alone on your car and without a wideband will leave you tuning blind.

joe