Jump to content
SAU Community

Recommended Posts

this is from a sales website:

The second generation Super AFC follows the highly successful Super AFC in an upgraded package. The Super AFC is a vehicle specific fuel computer that modifies the air flow meter signal/pressure sensor signal and allows the user to either richen or lean the fuel mixture. Adjustment ranges from +/-50%. The Super AFC boasts an 8 point adjustable fuel curve with 500 RPM increment setting points. The Super AFC also allows the user to adjust fuel enrichment according to either LO/HI throttle positions. The AFC also cures the erratic idle problems associated with open atmospheric blow off valves on hit wire air flow meter equipped vehicles. Monitor Mode shows analog meter faces, Y Graph Display, Numerical Display, Peak Hold, Replay Mode, 1 point/10 point and ghost map tracing. All correction factors are also displayed in percentages. All values and graphs are displayed through the exclusive VFD (Vacuum Florescent Display) screen

Link to comment
https://www.sau.com.au/forums/topic/5247-apexi-safc/#findComment-80310
Share on other sites

Is a S-AFC going to let me run a bigger AFM (Z32 type)? Will it also let me tune the most out of my mods?

Mods I currently have on or being fitted are:

K&N air pod

FMIC

exhaust

High Flow fuel pump

Is the S-AFC really necessary with the RB20DET? How tuneable is the standard ECU on these suckers? Would I be better off looking at an aftermarket ECU?

Thanks!

:D

Link to comment
https://www.sau.com.au/forums/topic/5247-apexi-safc/#findComment-80801
Share on other sites

With a SAFC you should be able to run the Z32 AFM. Can someone confirm this.

The standard ECU is tunable and in my opinion, would give you more power output than just the SAFC because the SAFC adjusts the air/fuel mix, not the ignition timing. If you tune the ECU, you tune both A/F and ignition.

Link to comment
https://www.sau.com.au/forums/topic/5247-apexi-safc/#findComment-80885
Share on other sites

Silver-Arrowz - doesn't it depend which eCU you have. On my R33 GTR I'm quite sure its not tuneable. But yes the SAFC doesn't allow you to adjust ignition timing.

I'm not aware of the the SAFC having a special setting for Z32 AFM. The AFM I thought simply takes in readings from the factory sensors for fuel and oxygen and adjusts then slightly.

Link to comment
https://www.sau.com.au/forums/topic/5247-apexi-safc/#findComment-80908
Share on other sites

Oh yes, your right there. Forgot about that. R33 ECU is not tunable.

With the Power FC it simply changes the voltage signal to whatever the z32 is. I'm thinking that the SAFC can adjust the A/F mixture to suit it, since it taps into the air flow meter anyway.

Link to comment
https://www.sau.com.au/forums/topic/5247-apexi-safc/#findComment-80933
Share on other sites

if u want to get technical its not exactly changing the a/f ratios.

It really just tricks the ecu into thinking u r getting less air flow than u really r so that it doesent run so rich!

Its what u call a band aid solution, get the factoru r32 ecu retuned u will get better results.

Link to comment
https://www.sau.com.au/forums/topic/5247-apexi-safc/#findComment-81660
Share on other sites

Inasnt: it DOES change the A/F ratios. It just does it by tricking the ECU into thinking less/more air is coming in at any point in time than really is. Because of that, it adjust the amount of fuel it gives it. The only reason a retuned ECU would be better is because you can change things other than the air/fuel ratios like ignition timing. If you just did the fueling on the ECU though, it would be just as good.

Link to comment
https://www.sau.com.au/forums/topic/5247-apexi-safc/#findComment-81783
Share on other sites

Originally posted by MIC33R

Inasnt: it DOES change the A/F ratios. It just does it by tricking the ECU into thinking less/more air is coming in at any point in time than really is. Because of that, it adjust the amount of fuel it gives it. The only reason a retuned ECU would be better is because you can change things other than the air/fuel ratios like ignition timing. If you just did the fueling on the ECU though, it would be just as good.

i know mate, i got 1!

Link to comment
https://www.sau.com.au/forums/topic/5247-apexi-safc/#findComment-81915
Share on other sites

It all comes down to cost. You can get an S-AFC for around $600, whereas a Power FC is over double that. You probably won't get twice the power gains with a Power FC! (it depends on your setup though). But the S-AFC is better than nothing.

My advice would be to get whichever you can afford. If you don't have much spare cash, get the S-AFC, then sell it and upgrade to the Power FC once you can afford it. That's what I'm doing :)

Regarding the bigger AFM, do you just change the meter itself or all the plumbing behind it? Just looking at my intake it all seems to be uniformly the same diameter down to the turbo, I can't figure out what benefits a larger AFM would give.

Link to comment
https://www.sau.com.au/forums/topic/5247-apexi-safc/#findComment-83692
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Before you blow your car up, have you checked you've made all the correct modifications to the wiring if you're still using the RB20DE loom?   Some things to look at: The pin used for the map sensor on the RB25DET, is the same pin used on the RB20DE for the Ring Gear Crankshaft Position Sensor, no idea what you've got it plugged into now. The turbo pressure control valve solenoid you're talking about on the RB25DET, the same pin is used for the Variable Air Intake Control Valve on the RB20DE.   The factory manual has the wiring pinouts in it for you to check everything. It also has the diagnostics process to read codes out. In addition, there's a great table that shows what sensors and what actuators not functioning will relate to which signals. And Nissan confirm the as everyone else has from experience, the Solenoid being disconnected won't cause a fuel cut. However, the turbo pressure sensor being missing / wrong, WILL cause a fuel cut. https://www.nicoclub.com/service-manual?fsm=Skyline%2FR34-Workshop-Manual-English.pdf
    • I've been hunting info on the G Series II - this is best I have found so far(Link below). Still waiting on the G35-1150 comp map, kind of very keen   So how do we go about getting precision on that little table of yours ?   https://turbosbytm.com/sites/default/files/product/technical-info/Garrett-G-Series-II-Product_Flyer 25 30 35_1.pdf  
    • yeah I get ~0.6L per session into the catch can. very ethanoly. It ends up overflowing out the breather of the catch can on circuit days too even with a 2.3L capacity catch can and I only drain out ~0.6L max. So every session I have to come in and drain the catch can, which is a hassle. So this is me cracking the shits and doing everything I can without removing the motor (back of head sump drain/breather and oil restrictors off the table). plans short term are: full length splash plates remove oem cam cover baffle add foam and reinstall at -10 or -12 AN fittings to the side of the cam covers down to the sump (luckily I already have fittings in the sump) Yes the ~340,000km unopened motor is probably not helping things
    • I'd use any fuel safe foam....mine went in 15 years and 15 rebuilds ago, still getting reused I'd have to say I don't understand swapping to studs to fit a particular baffle unless you are having a massive blowby issue, and even if you are addressing crankcase not head breathing is probably the next step.
    • BTW, the reason I came in here to "update" this list was that the Garrett G Series II range have been released and I've updated the list with their flow details if you're curious to check how they fit with previous Garretts and other brands The G-Series II G35 990 looks like a banger...
×
×
  • Create New...