Anyone have a second gen with an Apexi SAFC-ii?

Do you need the resistor to stop the factory ECU overwriting the Apexi's air/fuel changes? (you do in the 3rd gen, not sure about the second-gen?)

What about knock-sensors... I read on another thread that the Apexi can have knock sensors but the Magna doesn't? Is that just a 3rd gen thing too? (I'm pretty sure second gen's have knock sensors).

Also, for a car that only has intake and exhaust alterations (and no plans for anything else), is the Apexi worthwhile? Would it be able to improve my fuel economy as well? (my car runs really rich for some reason).

Cheers,
Kim

Hi Kim. In regards to the fuel consumption, a bunch of 2nd gen dudes have replaced their Oxygen sensors (in exhaust). Costs around about $80.00 or so from Repco and a little bit of time. This has boosted their economy.
As I have an Air/Fuel Ratio Meter in my car I can see how an age-ing 02 sensor will make a car (4g54) have no economy (I need a new one).

2nd gens have knock sensors as well. I have felt mine work before when I was tuning

I know no-one with an Apexi SAFC-ii. However I do know that their are no 'chips' for 4 cyl 2nd gens eg. Powerchip, Chiptorque etc. It is to my belief that you cant get much more power out of the 4g54 with a chipped computer. Dont know about the V6. My guess is maybe (sorry no help).

Hope this helps.

I've had my o2 sensors checked out, and it seems to be pulsing "within specifications". Do you think replacing it anyway could see an improvement?

Anyone know if the SAFC-ii will work in a 6G72 3L V6 2nd gen Magna?

Should work fine from what can tell it has the same airbox as mine (tr 4pot) , basically you hook into the MAF sensor line . I got a piggyback installed (not apexi) and yes there is improvements to be made . Havent got it dynotuned yet ,wont until I fit a decent exhaust as current one is rooted , but I got the software and tuning it is fairly simple ,though a wideband O2 would help.

does the apexi safc ii use software to tune the unit (and a laptop), or is it all done through the controls on the safc ii?

Whats a wideband o2?

Kim

does the apexi safc ii use software to tune the unit (and a laptop), or is it all done through the controls on the safc ii?

Whats a wideband o2?

Kim

i wideband 02 lets u read ur 02 more accurately then stock 02 sensor allowing u to tune
ur piggyback or safc 2 more accurately. i think all dynos use a wideband.

does the apexi safc ii use software to tune the unit (and a laptop), or is it all done through the controls on the safc ii?
Kim

AFAIK there is no pc connection for the Apexi , its done all with the front controls. Greddy is the better option overall as it goes fairly cheap on ebay , less then what you'd be paying a dealer locally for the Apexi.

AFAIK there is no pc connection for the Apexi , its done all with the front controls. Greddy is the better option overall as it goes fairly cheap on ebay , less then what you'd be paying a dealer locally for the Apexi.

yeah the apexi 2 is cheaper but it only lets u control fuel. with the greddy you can control
timing and ignition. it also has a knock sensor. it all depends on what u plan to do you car.
if you are gonna do mild modification then apexi is great. but if you are turbo it would good but not necessary to have a greddy. safc 2 is good enough for a turbo but greddy is better.

of course if you have the money haltech or aem standalone ecu are the best. they let u control everything and i mean everything in ur car. from ur ac to ur fuel to ur timing.

don't really plan on doing any major modifications... (why I thought the apexi would be an easier option).

Doesnt sound like anyone with the SOHC 12 valve V6 has actually installed one, tho?

Kim

dont know anything about sfac-ii but i've been offered 1650$ drive away for haltech interceptor which is the cheapest from fist in brissy, thats the closest i've seen to the cheaper chip that commodores etc get on the market....

I have a SAFC II fitted to my 4 cyl... no need for a resistor because your factory settings works fine when it is in a closed loop. For highways, after I have fitted the SAFC my car is able to squeeze a 600-650kms to a completely full tank approx 61litres because when I filled up i put in about 61. A new O2 sensor would help as an aged O2 sensor is a little slow.

Your best performance usually comes from optimised fuel curve. Depending on your mods a properly dyno tuned SAFC has given me 9kw at the wheels.

On the SAFC there is a high throttle and low throttle setting where it interchanges at different throttle positions.

For example on my car, low throttle + 1800rpm to 2200rpm I am running on 15% less fuel.

But every car is different even if its the same engine etc etc... so its best to find out for yourself.

what did it cost to have yours installed Jackson? (labour, etc). I can get the unit reasonably cheap but need to find an installer. Would you suggest having it done on a dyno, or someone with a lambda sensor to get it working with optimum air/fuel mixture? (lean out the rich spots).

Will look at getting my O2 sensor done too...

I had mine installed by a friend so I dont know. It cost 200 to get it tuned at Graham West on a dyno. I am not familiar with a lambda sensor so I cant tell you anything but to tune it you need to tune 2 profiles with the high and low throttle. On mine I have low throttle as below 30% and high throttle as 70% and the SAFC will do different settings on different throttle and it will calculate in between. I had my timing adjusted at the same time. but optimum air/fuel would bring you best econ and performance usually.

I am gonna have to look into that greddy Ultimate. Sounds better than the e-manage.

The Ultimate does timing as well doesnt it? I havent done any serious mods on my car (no plans to either), so just air/fuel is all I'm really after.

That said, though - for about the same price as the apexi I could get a greddy e-manage - however then I'd need to pay for the support tool and everything because no one in Tasmania fits these as far as I know...

Kim

I did it and it worked fine. Just make sure you get the RPM from the distributor, and the correct signal (one of them only puts out a signal to 2,000 RPM).

hey Magna - any change of getting a copy of your settings/map for your SAFC-II? (as a starting point for me to get mine tuned). I guess just a list of the +/- air/fuel mixture for each thottle position/RPM? Do you have it written down somewhere incase your battery goes flat and you loose your settings?

Kim

Mine was the 5 knob version (not the LCD screen with every 500 RPM intervals). You're proberbly best paying the $100 to get someone to run it on the dyno for you.

MAGNA: I've had mine wired up (to the coil), but it's causing the engine to die every now and then (anywhere under 1000rpm, the revs drop to 0 and the car stalls). It happens very suddenly.

You didn't have this problem did you?

My car doesnt seem to like grabbing the RPM from the coil...