NissanForums.com :: Nissan Forum - View Single Post

bridrive55 · Aug 21st, 2005, 05:50 PM

Some peole get hung up about management for their KA-T projects. Is it possible to use anything else besides AEM's expensive EMS system?
Yes, yes it is. If you don't want to shell out huge bucks for the Greddy EManage system with all the subharnesses that you need to buy to make it worth a shit, Apexera electronics makes what is in many people's opinions the best tuning option for the KA24DET. SAFC-II.
Many people think that because the 240SX uses a USDM ECU, the SAFC-II won't work. Well, it will. And it's small, cheap, easy, affective, and even pretty. Coupled with AVC-R, SAFC-II gives you virtually unlimited tuning options. SAFC-II is programmed to accept any Nissan MAFS, so if you use the stock KA24DE MAF, a larger Maxima or N/A Z32 MAF, the even larger Z32 TT MAF, or the insanely large Q45/GTR MAF like I use, SAFC-II will still read the voltage just fine. SAFC-II allows up to 50% correction of the Air/Fuel curve, and there are ways to monkey with it to get SAFC-II to run up to 400RWHP, or so they say.
I've had awesome luck with my SAFC-II. It was simple to wire, easy to program and tune, and allowed me to safely run 15psi of boost on 550cc injectors, with a GTR MAF and a stock TPS. SAFC-II is in my opinion the best tuning option for mid power KA24DET's.
So how do you wire the damn thing? The 240SX ECU isn't in the little wiring diagram booklet. Wrong junior, it is. The 240SX ECU uses the N3-A wiring plot in the SAFC-II booklet. N3-A, remember that.
The SAFC-II comes with a neat little assortment of wiring couplers and joints that should be discarded immediately. Just solder the wires in place, and you'll enjoy years of solid connection. The double ground wire is not a joke, you need to ground the two wires between 1 and 4 centimeters apart. Make sure you do the initial setup BEFORE you turn the engine on, THEN do the knock sensor setup and tuning. The KA24DE TPS is the downward pointing arrow type. The only problem I've seen with KA24DE SAFC-II setups is the Rev sensor. Make sure the tach sensor on the transmission is the same type as the ECU. You might experience problems using a KA24E tach sensor on a later setup, as I did.
Good luck with the tuning! I recommend at least wide band tuning, and use a dynomometer if you can. If there are any KA24DET questions/discussions, please post them here.

Aug 21st, 2005, 05:50 PM	#14 (permalink)
bridrive55 KA24DET Join Date: Aug 2004 Location: UW Madison Posts: 1,000	Wiring the Apex'i SAFC-II Some peole get hung up about management for their KA-T projects. Is it possible to use anything else besides AEM's expensive EMS system? Yes, yes it is. If you don't want to shell out huge bucks for the Greddy EManage system with all the subharnesses that you need to buy to make it worth a shit, Apexera electronics makes what is in many people's opinions the best tuning option for the KA24DET. SAFC-II. Many people think that because the 240SX uses a USDM ECU, the SAFC-II won't work. Well, it will. And it's small, cheap, easy, affective, and even pretty. Coupled with AVC-R, SAFC-II gives you virtually unlimited tuning options. SAFC-II is programmed to accept any Nissan MAFS, so if you use the stock KA24DE MAF, a larger Maxima or N/A Z32 MAF, the even larger Z32 TT MAF, or the insanely large Q45/GTR MAF like I use, SAFC-II will still read the voltage just fine. SAFC-II allows up to 50% correction of the Air/Fuel curve, and there are ways to monkey with it to get SAFC-II to run up to 400RWHP, or so they say. I've had awesome luck with my SAFC-II. It was simple to wire, easy to program and tune, and allowed me to safely run 15psi of boost on 550cc injectors, with a GTR MAF and a stock TPS. SAFC-II is in my opinion the best tuning option for mid power KA24DET's. So how do you wire the damn thing? The 240SX ECU isn't in the little wiring diagram booklet. Wrong junior, it is. The 240SX ECU uses the N3-A wiring plot in the SAFC-II booklet. N3-A, remember that. The SAFC-II comes with a neat little assortment of wiring couplers and joints that should be discarded immediately. Just solder the wires in place, and you'll enjoy years of solid connection. The double ground wire is not a joke, you need to ground the two wires between 1 and 4 centimeters apart. Make sure you do the initial setup BEFORE you turn the engine on, THEN do the knock sensor setup and tuning. The KA24DE TPS is the downward pointing arrow type. The only problem I've seen with KA24DE SAFC-II setups is the Rev sensor. Make sure the tach sensor on the transmission is the same type as the ECU. You might experience problems using a KA24E tach sensor on a later setup, as I did. Good luck with the tuning! I recommend at least wide band tuning, and use a dynomometer if you can. If there are any KA24DET questions/discussions, please post them here. __________________ StreetTech S13 KA24DET, .70A/R T04E, FMIC, VLSD, SAFC-II, 550cc's, Q45 MAF.