Thats true.....the timing adjustability does give your unit an advantage.........the SAFC-II's advantage is the monitoring ability........i'm looking forward to seeing more about your product......it sounds very promising

 

but cant your dealer change your timing, FOR FREE!!??

 

Ok. I'm probably the only one that has a tuned AFC-II right now. First, you don't need a wide band O2.
Second I can probably tune out more the 6hp and 8lbs tq but that was good enough for now to make sure it works. Plus I have to take it down again to get it redynoed to make sure the ecu has not compensated for anything. Though it's been over month now and have not felt any changes or noticed any changes at the drag strip.
True the AFC does not do anything for timing. But from what I can tell the monitoring is a whole lot nicer on the AFC. Plus having two map settings is a plus. When I go back to dyno again I'm going to have two map settings put in. One for just gp and the other set for racing fuel.
I decided to play with the S-AFC II cause it didn't cost me all that much to do. And it would be fun. If/when Apex comes out with the PFC I'll probably move to that and see how that works out.
I will admit though that the AFC would probably be a whole lot more benificial to those who actually know how to tune, unlike myself, but fortunately I know enough people to help in that case.
But I'm just not into flashing ecu's. Seems like a waste of time and effort. To many factors. Octane levels, elevation... any type of air change and the flashed ecu would react differently and so the same of AFC but it's a lot easier to manage with the AFC.
That's my .02

 

How can you tune it properly without using a wide band o2??? Aren't you scared of running to lean? Anyway, as far as monitoring, I can hook up my laptop anytime I want to monitor. The smt6 can monitor a/f, rpm's, engine temp, injector duty cycle, amps, and ignition, and data log it in really cool graphs and charts...(2d & 3d)

 

Excuse the stupid questions, but what does the plenum do and how does it increase performance?

 

Yeah, all they have to do is plug in the Consult II.......I'd love to get my hands on one of those

 

Apparently the AFC-II hooks a wire into the 02 sensor wire and you can monitor the A/F voltage ( Apexi unit converts voltage to a ratio ) that is being relayed to the ECU. It is not as good as a wideband but you will know what the ECU is getting from you're engine as an A/F ratio.

 

I tried emailing you Jason but it got kicked back to me saying your account doesnt exist. Please shoot me an email when you get an idea what your product will cost and when I can get 1.

 

Stock o2 sensors(narrow band) only tell you if you are rich or lean. They don't tell you how off you are from stoich. Thats why you need a wide band to tune properly.

 

Hopefully the experts here (which I am not) will correct me if I'm wrong...the plenum (or more correctly intake plenum) is the body on top of the engine through which air travels into the engine. By altering its size and shape, the speed and pressure of the air entering the engine can be altered to some degree...certainly nothing on the order of a supercharger or turbo, but enough for noticeable gains to be made. I would guess aroung 10 HP or a little more could be made with an improved plenum.

 

Close....it connects in series into the Mass Air Flow sensor wire, parallel connection to the knock sensor wire, and parallel connection to the Number 1 cylinder signal(for an rpm reading).......from there it displays all the data

 

I'm not an "expert" either but you are correct. The plenum or "manifold" is what directs and splits the air for each cynlinder.
Jason
jays350z@aol.com

 

Then how does the AFC display an A/F number with relation to exhaust readings?? It doesn't seem right that the computer would base the A/F ratio on the amounts of air going into the engine.

 

i have finaly decide that i dont have time to install/tune this thing! although i have high hopes for it in the right hands. its just too time consuming for me!! (check the classifieds if anyone needs one.) i cant wait to see what a good tuner, with some time to play with it, can do with it???

 

It doesn't relate the A/F readings to the exhaust readings......it can show you throttle position, rpm, correction factor, and knock level, all in relation to each other, but exhaust is not considered. That may or may not be a part of the install procedure. A local shop told me that the installation would require an O2 bung in the exhaust, while on the dyno, and then the removal of the O2 sensor when installation and tune was completed. But then i've heard of others who were tuned without the O2. I haven't found anything in the manual that says an O2 is necessary for tuning.

 

the consult is limited to the amount of timing it can advance and retard... and does not take into affect the variable timing mapps when it changes at 4k.

 

The Consult II is what Nissan specifies in their 350Z Service Manual as the device that should be used when altering the ECM's programming.....it's capable of advancing at least 5 degrees over stock, which is more than adequate.......if we're still talking about using it in conjunction with the SAFC-II, then the variable timing maps would be taken care of by the Apex'i unit.