Halo.
well. i FINALLY got my Super AFC Installed. (thanks Keven97SE)

Here's the low down:
What is it: Air Fuel Controller that manipulates the signal input from the Air Fuel sensors on the car.
also monitors Throttle position, RPMs, air pressure, and some other stuff.

Difficulty of Install: Medium (Hard if you're an idiot )

What you need for install: Portable Gas/Butane powered Soldering iron, solder, flux fluid (for ease of soldering) 10MM socket driver (short and deep), mini phillips screwdriver at 90 degree angle to fit in small area, electrical tape, and a whole lotta patience... for me i also needed a fat Winny the Pooh Band Aid to cover the 2 inch laceration on my thumb courtesy of the ECU harness....

General steps (step by step install will be provided on MaximaDriver.com's HOW2 section in a few days)

1) remove your ECU
2) remove the 2 10mm bolts attaching the ecu bracket to the car. you'll need to become a human pretzel and get back in there behind the center console for this. its nuts. and funny if you can take a picture of your butt as it sticks out of the door....
3) now, on the ECU connector (the harness that attaches to the ECU) you will see a clear plastic cover you'll need to confer with the instructions from the APEX'i Website.
we are WORLD NA-5 Configuration, which means we will also be using the HOT TAP-4 Configuration.

For connecting the wires, here's a simple color to color reference in which wire to tap into,
please see the wiring diagram on the instructions in aid of the color scheme, because nissan reuses alot of wire colors,

SAFC Wire ----> ECU Wire
Red (Power) ----> Red
BROWN (ground #1, closest to ECU) ----> Black
BLACK (ground #2, comes 1cm after brown) ---> Same Black wire as above
GRAY (throttle positon) ---> White wire with silver dots
Green (RPM signal) -----> White wire with GREEN stipes every1inch
Yellow (air flow signal, taps closes to ecu) ---> White wire with silver dots (cut in two.)
White (air flow signal, taps into harness ) ---> White wire with silver dots (cut in two)

splice into the ECU wires, solder the SAFC wire into place, and secure with electrical tape. or use the included tap wire connectors. but be warned: those dont ALWAYS offer complete connection...

you will NOT use three wires, on the SAFC harness, pink, blue, and lite brown.. tape down . and hide.

4) reasseble the ECU harness clear cover, push in all the wires and electrical tape the mess together. Reassemble the ECU bracket and such.

5) turn car on, and see that FREAKIN COOL Apexi logo swirl on.
goto ETC. menu, go to INITALIZE and initalize the afc by selecting YES by hitting the arrow keys and hitting NEXT, then go PREV, and turn off car. wait 2 seconds. turn ON CAR and go back to ETC menu.
goto Sensor Type. Select HOTTAP, select 04 in, 04 out, and hit prev. goto car select, then go 6 cylinder, and the arrow pointing UP for throttle. hit prev, and go back to monitor.
you're basically set. now just have to do your own turning with the settings for A/F mixtre

i suggest in getting an AIR FUEL ratio display (i.e. AutoMeter A/F gauge) and use that to help tune Rich/Lean mixtures at certain RPM...

becareful. too lean and you'll ping. too rich and you'll feel it in the wallet.
imho. for tuning. go to your local dyno shop and do tuning there with the car on th dyno.

expected gains? NA cars: 1-2 hp. at most. SC'd Maximas : 3-10, you can do wunders with boost.




hope that helps,
woo hoo. i love this thing. its so cool.
it also has PEAK hold ... i got a 56.2 air mass flow rating.

ok. ttyl,

Cheston

 

What's the point of installing it, if the gain is only 1-2hp on a NA car?

Is it really worth the $$$? Also, do you really need to tune your air/fuel ratio in a stock config? Are you sane?

btw, Chebosto, I enjoy reading your how-tos, its always informative and funny at the same time...keep it up!

 

As far being sane, i dunno. ask Skimax ...

as for worth the money? well. i suppose everything is relative for what you have in pocket. i got mine used, so it was practically half off retail. so to me. its a nice addition. for any and all mods. you have to ask is it worth it? most of the time i say yes because when building a faster car, every little thing helps.

I'm running the Gforce tuned ECU, and mainly just using the SAFC as a test mule to lean/rich the fuel curve for R&D purposes for the gforce program. to see if we can make any more power out of it..

so its just a fine tuning module rather than brute HP gains...



--Cheston

 

Good info and FAQ this on your site if you already haven't done so.

BTW, get your car dynoed again and take it to the track.....please....


Dave

 

 

My cousin and i did this installation last week.. the only problem we had was the sensor calculations.. but we left them how they were.. anyway

it allows you to change your rich or lean at each 1000 rpm so if you feel you are loosing at a certain rpm or gaining too much .. you can control it.. its a great unit..

first and foremost it is not a hp booster.. its a Air Fuel Controller.. and it does this by tricking the O2 sensor on the car to think you are running lean/rich when you are not..

Phil also runs this in his S/C max

 

showed a 6hp gain in the low end(LO Throt. setting) and 8-10 gain in the high end(HI Throt. setting) on their N/A '00 IS300 with exhaust and intake. I can check and make sure if anyone wants....

-----------------
I just re-read the article and the HP gained comparison is to stock numbers not exhaust and intake numbers. so the HP gains aren't as significant as I thought, but with just a catback and intake and AFC tuning they came up with 14.6hp gain...I guess it would've helped if they had included what gains they saw before the AFC was added as well....

 

Could you use this with 300z injectors?

 

Yes you could, but I still think you would need a JWT ECU program, so that it works correctly.

 

Incorrect. The AFC alters the mass air flow sensor voltage before the ECU sees it, not the O2 sensor.

If you want to run richer (more fuel), the AFC overstates the MAF voltage. If you want to run leaner (less fuel), the AFC understates the MAF voltage.

On an NA vehicle with a few bolt ons, there are better things to purchase before an air fuel controller. There isn't much margin for tuning your air/fuel mixture to optimize.

Once you go forced induction with different fuel and timing maps along with adjustable fuel pressure regulators, then it's a good investment.

 

 

<------ #1 archiver

Search brings up 45 other threads on the S-AFC but I'm TTT this one because I feel like it hehe.

 

 

Yes very interesting indeed. I'm almost wondering if this is what would be needed if a 5 gen intake manifold to 4 gen manifold swap ever happens. i remember seeing on those 500 HP 4 cyl cars that for those who used MAF flow meters (nissan sentras...) that they had to substitute another car's throttle body and MAF meter for it to actually work. I believe a Mustang Cobra's MAF meter was used in the sentra's case. Air fuel controller is probably what is needed in order to make use of the new air flow sensor.....

 

hey do you guys which two colored wires i'll need to connect to run my car. Remember my AFC got stolen and the long tube of wires is just sitting on my dash. I am going to be putting my S/C back on, so I will need to have the car be able to run.

Thanks,
Mike

 

White wire with silver dots which was cut in half (air flow wire).

 

So, since I have the AFC end of the wires, I will have to connect the yellow and the white wires, in order to make my max run?


-Mike

 

Yes, you can do that.