The voltage check is just to make sure your signals are working right. One trick that has been done in the past is to use the secondary MAF signal input (for cars with two MAF sensors) and wire that to your front O2 sensor to get a free air/fuel meter although as I said before that is only a rough estimate of your air/fuel mixture. Many maps floating around for the EVO are fairly aggressive so be cautious.
Another note, you MUST setup the sensor settings. Our cars use 4 cylinder, Karman, with the TPS setup being the upward pointing arrow, etc.

Mark
www.Quantum-Racing.com

 

I thought that was to determine the sensor voltage of the sensor...

I thought that might be a neat trick to get the voltage reading from the O2 sensor, but you are right, it's not very useable... I'm going to use the settings suggested by the tuner who sold me the SAFC (they seem conservative compared with some I read posted....)

This is the biggest part of the whole thing. These settings are what I really want to be sure about before I start using the SAFC2... I know now about the 4 cyl, Karman and TPS arrow... The "etc." is what I'm not sure about.....


Thanks a lot Mark, great info......

 

You have an SAFC2 and don't know the settings?!?!
The SAFC2 comes with a Japanese instruction manual which should tell you those settings for CT9A and others in the back of the book, IIRC. What other settings are there? I cannot remember anymore off hand but if you tell me I will remember for sure. They are the same as DSM's;
http://www.roadraceengineering.com/newafcsetting.htm
Don't use their actual values for NE points but the unit setup should be the same.

Mark

 

OK, here is what I found out so far. I set the SAFC2 initially on my dining room table with a battery charger as a power source.
I set up the sensor type for karman, the car selection I chose 4 cyl. with the arrow pointing up.

I hooked it up to the car and started the engine so I could verify the rpm and perform the sensor check. The set up I used did not produce matching rpm between to tach and the SAFC2. Here are some readings:

4 cyl-arrow up:
Tach : 1000 1800 3000 4000 5000
SAFC2: 841 1261 1927 2200 3037

3 cyl-arrow up:
Tach : 850 1500 3300 4000 5200
SAFC2: 620 1150 2400 3300 3600

2 cyl-arrow up:
Tach : 850 1500 3000 4100 5100
SAFC2: 914 1600 3200 4400 5300

1 cyl-arrow up:
Tach : 850 2100
SAFC2: 1817 4500

The numbers are approximate. It's very difficult to hold the pedal at a steady rpm with my foot. I gotta find some mechanical way to hold the accelerator down.
Anyway, as you can see, none of the settings resulted in matched rpm. I could not find any obvious way to calibrate the SAFC2 to the engine tachometer. I left the car in the "2 cyl-arrow up" setting. Is this going to result in a problem?

I also proceeded to do a sensor check. The readings were:
IN-1: 0.020-.025 V
IN-2: 0.010-.015 V
Thrt: 0.650-.660 V
KNK: .00060

I'm still unsure about these settings. For one thing the users manual shows in page 51 some explanations (in clear Japanese ) that the voltages show by the sensor check are related to the the direction of the arrow or the 2 asterisks next to the number of cylinders in the "car select" menu. Of course, I cannot fathom what these instructions might say.....

Can anyone shed more light on this?

Thanks

 

Thanks for the tip of http://www.roadraceengineering.com/newafcsetting.htm
Very useful..... I really appreciate it... do you know why the rpm reported by the SAFC2 and the tach do not coincide?

 

lets keep this post alive...

i would also like to compare settings with anyone willing to do so..
my mods installed so far are:
rmr intake, blitz sbc id, buschur 3" turbo back, greddy type s, and safc..

 

I have been playing with my settings that I first started the post with for the past month. I have traveled back and forth to CA in both the HOT air here in AZ and the cool there running about 19lbs to be convenient for daily driving.

I went to run the car not so lean, to really rich, back to my first settings posted...

The car works awesome that way! I have installed a Knock link...which everyone should to listen to detonation. The car is running reall good

 

I don't know how or where some of you are getting their voltage readings for the O2 sensor. I've got a pocket logger and the readings from the first O2 sensor (there are 2 of them..) range from .0 to .96 These are dependant on the TPS with the lower readings taking place at low TPS % and the highest readings at WOT (90% or higher TPS). These readings are with the SAFC2 settings provided by AMS which are more conservative than those you posted earlier or those of others who run more aggressive settings.
I'm not sure what these readings represent but I think that they are "safe". I will do more data logging without the SAFC2 in place and see what the readings are like and compare them with the loggings with the SAFC2 in place. Anyway, I'm obviously getting readings much lower than .91- .92 (volts?) but these do not occur except at very low TPS percentages so it might be OK. Oh yeah, we do have 93 octane gas around here so that might be a plus....
Any thoughts?

 

I'm gonna go ahead and bring this thread back and see if we can't get some more feedback.

I'll be putting on my SAFCII unit really soon, along with a HKS downpipe and JIC catback exhaust. I'll be running 93 octane, so will the above maps be okay to use? I don't have a wideband or a dyno near here and I'm at school now so taking a roadtrip to find one is a bit out of the question.

I don't need to have overly aggressive settings, but at least enough to take advantage of my new exhaust.

Any help?

 

Ca anybody post a step by step how-to strarting from getting the S-AFC II out of the box? Pictures would be super as well.

Have the most OPTIMAL settings installed for a stock EVO and have tips when adding certain parts such as a cone intake, downpipe, cat-back, cat-delete, etc.

Thanks guys!

 

If I have Xede can I still use the safcII? or should i use the safcII

 

The instructions for wiring and operating the SAFC2 are available in PDF formart from the Apex website, see http://www.apexi-usa.com/documentation.asp and choose the appropriate documents.... I would add a harness extender such as the Fields unit. Some folks have already posted settings that could be used as a starting point. It's not possible to post the OPTIMAL settings for any EVO as each particular car must be individually tuned to obtain these settings. Also, every time another (significant) modificatioin is done to the car, the SAFC2 must be retuned to obtain optimal settings..... Sorry, there are no shortcuts or instant fixes....

You could add the SAFC2 to the car in addition to the XEDE, but why would you want to do it? According to Shiv, the XEDE already does everything that the SAFC2 does plus more.
The SAFC2 would at best be an expensive and worthless addition to the XEDE and at worst it could undo everything the XEDE is doing plus cause the engine to fail....... IMHO, you should not add any type of fuel or timing controller if you already have an XEDE. It would be like adding another XEDE or running 2 SAFC's in the same car

 

You could add the SAFC2 to the car in addition to the XEDE, but why would you want to do it? According to Shiv, the XEDE already does everything that the SAFC2 does plus more.
The SAFC2 would at best be an expensive and worthless addition to the XEDE and at worst it could undo everything the XEDE is doing plus cause the engine to fail....... IMHO, you should not add any type of fuel or timing controller if you already have an XEDE. It would be like adding another XEDE or running 2 SAFC's in the same car [/B][/QUOTE]

Yep, With xede you have a 20x20 fuel adjustments compared to 12 Rpm points of the S-AFCII. Shiv's base maps are very good to begin with so just load up the closest base map and get to a dyno.

Eric

 

Yes, it's true that you have more rpm points of adjustment with the XEDE and it would be a bad idea to add a SFAC2 to it. However, I don't agree that the XEDE maps will be necessarily better than the SAFC2 adjustments if they are done with a wide band O2 sensor and a dyno.
Please correct me if I'm wrong but I'm not sure if the XEDE cab be tune by the end user.... I believe you can have a variety of pre-programmed maps that you can load into the XEDE but none of these would be optimized for your particular car...

 

Yes you can user tune.

Eric