anyone good with a SAFCII? need some info...

[srpowered240sx]

looking for some info that for some reason no one at apexi can answer. i have a safcII on the way, and i want to know if there is a certain method to setting up the decel air so i can blow an open atmosphere bov? i know how to clear all the modified settings so it sets back to factory settings, and im only going to be using it for the bov until i can hit a dyno. i know lots of you have them, if someone can give me a step by step list of how to, that would be great. thanks.

[srpowered240sx]

come on, i refuse to believe that no one uses a safc, i see them in every interior thread.

[redtop91]

I don't use an SAFC but everyone says it's the easiest way to correct stumbling on an atmospheric BOV, so I'd say it should, but no first hand experience. Bump 4 joo.

[Ender_Zero]

well, the only time i've messed with an SAFC was with my buddie's turbo FC, we'd ride around, change a few settings, ride some more. Tuning on the fly, heh. Don't recall seeing any "decel air" in any part of the menu though. Good luck.

[s14tan]

Just cause your nice.

[turbo2nr]

look at the air flow on cold start, i believe that the first value on decel air setting..

then record teh air flow on cold start that the second setting

then bring the rpms to 1500 and record the tps at 1500 and thats your 3rd setting.

that worked for me... h ave a ssqv and it rarely ever stalls...

when i go home ill look at my safc and correct what i wrote if needed...

[srpowered240sx]

look at the air flow on cold start, i believe that the first value on decel air setting..

then record teh air flow on cold start that the second setting

then bring the rpms to 1500 and record the tps at 1500 and thats your 3rd setting.

that worked for me... h ave a ssqv and it rarely ever stalls...

when i go home ill look at my safc and correct what i wrote if needed...

good looking out, im sure it will make a lot more sense when i put it in and turn it on. should be arriving next week.

thanks for the help guys. any other info is appreciated.

[240wootie]

come on, i refuse to believe that no one uses a safc, i see them in every interior thread.

shhhh... they're just for looks I'm curious about using them too. i need to do some tuning if i upgrade my turbo..

[sr20detRcr1]

i can get u my settings from my safcII

nvm didnt read whole post

[eazye2000]

There is a good link to how to do it in the KA-T forum. Also I think on KA-T.org. I could be mistaken. I have them printed out in the garage somewhere. I'll get back to you.....maybe.... lol

[srpowered240sx]

i got the safc, harness will be here today, any help before i start to "wing it"?

[White Comet]

i got the safc, harness will be here today, any help before i start to "wing it"?

wish i could help, mrgreeneyes has one for his NA KA. he got it and just started messing with it til he figured stuff out so it cant be rocket science

[srpowered240sx]

yeah, ive got it mostly figured out with the instructions and talking to some of the guys at apexi.

[mrgreeneyes]

im not dumb, comet. lol

"its so easy mrgreeneyes can even do it" haha

i didnt mess with any decel settings or anything of that nature... its on an NA KA for now... so i can get used to it then play when the CA goes in. wiring is stupid easy, just follow their instructions. solder all connections. tape, etc.

and hey, bump for srpowered

[White Comet]

im not dumb, comet. lol

"its so easy mrgreeneyes can even do it" haha

i didnt mess with any decel settings or anything of that nature... its on an NA KA for now... so i can get used to it then play when the CA goes in. wiring is stupid easy, just follow their instructions. solder all connections. tape, etc.

and hey, bump for srpowered

hahah i didnt mean THAT although that is a good catch phrase though

[Rosco]

Start when the car is cold. (after an overnight rest)

Turn key on, go to decel air settings.

Set throttle to 1%.

Set NE1 to about 4.

Set NE2 to about 5.

Start car.

Adjust NE1 until you get a smooth idle while the engine is still cold. Now start turning it down as low as possible while still maintaining a good idle.

If the car starts sputtering and getting rough, you just went too low. Turn it back up very slowly until it smooths out. You want to leave NE1 on the lowest possible point with a good idle.

Now set NE2 to be about 1 higher than NE1.

This formula shoudl eliminate any stalling or popping from the BOV being open.

Theory: Throttle setting tells the SAFC whenever the pedal is depressed less than 1%, the SAFC should control fuel and ignore everything else (including the MAF)

NE1 is the first RPM point you have selected in your NE Point settings. I put mine at 1000 rpm. I set NE2 at 3000, then NE3 at 4000, and so on in 1000 increments. Setting NE1 down at 1000 gives you the ability to control fuel at idle really well. Besides, you probably don't need to adjust anything between 1000 and 3000. (turbo spools after that, right?)

Setting the air flow percentage at NE1 is basically telling the SAFC a number to use whenever it reaches that RPM and less than the throttle setting. So, as the throttle is let off, the SAFC looks at the NE1 and NE2 points. As RPM rolls back, there is going to be a reduction in air into the engine, yet the MAF has already seen it. The stock ECU is attempting to send the fuel for that air that is now missing... hence your stalling and backfiring. The SAFC catches that signal, ignores it, then tells the ECU exactly how much air flow you have according to your DEC AIR settings at those RPM points. Get it?

RPM comes down, hits NE2, SAFC sees 10%. It tells the ECU it needs 5%. (because you picked that number.) Now the RPM won't dive so hard like it was. It reaches NE1, SAFC sees 6%, you told it 4% and it tells the computer only 4%. The idle sets steadily down to where its supposed to and everybody is happy.

The SAFC is all about tricking the ECU into doing what you want it to.

***I am not the author of this "guide"***

I like white chocalate chip macadamia cookies......

[White Comet]

i saw that ninja edit, i was wondering why the link didnt work

[srpowered240sx]

Start when the car is cold. (after an overnight rest)

I like white chocalate chip macadamia cookies......

perfect, thank you. ill be scaring small children and old people in no time.

[hpmachine]

Dude all the info you need is on the Apexi site. Click on the support link to download all the info for the safcII.

[yessir240]

just wanted to come in and ***** and whine about how much SAFCs suck ***, thats all.Basically they trick your maf into thinking there is more air which then increases the amount of fuel added, fuel map, and then all sorts of ****ing maps start to change ie timing etc. Its not the best way to tune but ppl do it and make good power for long periods of time so .

Good luck.

[Rosco]

i saw that ninja edit, i was wondering why the link didnt work

Yeah, I always try to check my links after I post and that was a link to FA forums. Maybe that's why??? I dunno....but damn, nice catch tho.

[White Comet]

lol yeah i catch a lot of ninja edits cuz i'm quick like that

semi related, what advantages does the safc neo have over the safc2?

[srpowered240sx]

semi related, what advantages does the safc neo have over the safc2?

cleaner screen, with color. better graphics. incorporates vtech (so only one unit). other than that, i think it just is a little fancier and faster than the others.

just wanted to come in and ***** and whine about how much SAFCs suck ***, thats all.Basically they trick your maf into thinking there is more air which then increases the amount of fuel added, fuel map, and then all sorts of ****ing maps start to change ie timing etc. Its not the best way to tune but ppl do it and make good power for long periods of time so .

Good luck.

well, good point, kinda. you say it sucks, but it works....ok. im using this strictly for the decel air, then im gonna get a stand alone when i upgrade the injectors/turbo/and switch to map.

[yessir240]

ya you are good to go then!

[srpowered240sx]

put it all in and reset it back to factory specs. started car and ran it with the same recirculated bov for a few days and it ran exactly the same. then i put the open atmosphere bov on it, set it just like rosco said, and put it about 1% over the point were it started to stall when idling. all seemed well, then when i went to throttle it, the car would just sputter and not climb in rpms.....any ideas??

[srpowered240sx]

any time the decel is activated, the car wont take any throttle. someones got to have solved this issue by now.

[Rosco]

Hmmm....Lemme do some digging and experimenting on my car, I re-circulated my BOV a while ago so I haven't f'ed with decel in a long time.

[srpowered240sx]

thanks man. it sucks having everything back together and not be able to drive it. im gonna hit up apexi today as well.

[srpowered240sx]

roscoe, i got it figured out. i had the tps tapped into the wrong wire, got it set up, now you can hear me blow off from a few blocks away.

[White Comet]

so wait, with an safc u can adjust to run a non recirculated bov?