Ryde _Or_Die

Alright my s-afc installation was a success(with the help of silverotor, thanks man).

Now for a few questions. Can anyone help me out with tuning it just for driveability purposes. I am goin to the dyno next weekend. But based on my mods, whats a safe about of fuel to take out? RIght now I put it at -10% at 4000rpms, -7% at 5000rpms, -4% at 6000rpms and -2% at 7000rpms. I am pretty damn sure I will still be running rich as hell. Can someone confirm this for me? Thanks alot. (and I know, I know...You need to go to a dyno to know for sure and everyones setup is different)

OPEC

Ryde.. I can send you my SAFC settings tomorrow. I would do it right now but i don't have the battery in the car.. I will do it first thing in the morning for you. As far as i can see you are running plenty rich especially if you are running stock boost levels or at least keeping it under 10psi..

Ryde _Or_Die

Ya I figure I'm gunna be running pretty damn rich right now. I'll find out how rich soon enough though. But I am going to be putting a catback and 3" custom TID on soon along with the greddy i/c so I figure my boost is going to be what, 12psi?

silverrotor

iTrader: (1)

Just IMO, although you are aware of having It Dyno tuned for max results, WAIT. Why would you want to have Input from other FC's b'c they tend to have the same mods as you? You still have to have It dyno tuned.

In my case, It will be almost a week now I have had my S-AFC Installed on the the default settings. Sure It's easy to refer to https://www.rx7club.com/forum/showth...hreadid=115643 have a general Idea and start Inputting. Maybe It's just me. I still have to Install my FP, Port my Manifolds and change my Spark Plugs before I consider dyno tuning my S-AFC to obtain MAXIMUM results.

HAILERS

IMHO (gee, does this mean I have a dishonest opinion??) the best thing to do is buy a WIDEBAND O2 meter from TECH EDGE at http://www.techedge.com.au/vehicle/wbo2/wbo2.htm Your probably wallowing in fuel right now.

silverrotor

iTrader: (1)

I think this Is where Bambam7 got his.

OPEC

Here are my SAFC settings.. I have 4x720cc injectors, walbor, older HKS front mount, unported motor, stock turbo running 11-12 psi, full 3" exhaust. I have dyno'ed with close to these settings and then have done minor tuning and fine adjustments on the street with my FJO wideband.

Low Throttle 20% High Throttle 60%

HI
1k 0
2k +2
3K +2
4k +1
5K -8
6K -14
7K -20
8K -14

LO
1k -5
2K +5
3K +5
4k +5
5k +2
6k +2
7K +2
8K +2

For me these are pretty safe settings, never really ever see over 11.0 on the wideband and the EGT's are nice. I could lean out the low settings some, but with out being able to control when the secondaries come on, I was going a tad lean before 4K so I have it set a bit rich to make up for it till secondaries come on. Hope this helps a little.. But again, no car is alike.

jacobcartmill

iTrader: (6)

hey opec. how much power do you put down? and have you run at the track? you seem to have your car setup the way i want mine to be: 12 psi with fmic, 720s, walbro, safc. get back to me.

OPEC

If you click on the link inbetween my name and the graphic you can see my dyno chart. at the time that dyno was taken the car was running way richer than it is now, and it was like 102 ambient temperature. I would guess that it is like 250+ since I have got it tuned better.

Ryde _Or_Die

So $269 for the whole kit then? Does the sensor fit in the stock location? Seems like a good investment if it works up to par. Is that a high quality unit? Or is a Wide-band O2 sensor, a wide-band O2 sensor(they're all the same)?

chris_stampe

just installing the afc and having it at 0% correction wont be any different than what youve got now right? So why not just leave it untill the dyno?

boostmotorsport

Opec- at 5K you drop the pulswidth, why? Isnt that about when you go into boost? Why arent your settings the opposite, going from less fuel before boost and more under boost? I especially wonder why your settings are in the + range while youre primaries are still on(low boost). My un wide band tuned settings are the opposite, but I have similar mods. I am not doubting you, just confused.

OPEC

I hit full boost at about 3500 rpm, by the time I hit about 4500 or so, the injectors are putting in so much fuel that i have to lean it out that much. I have tuned the car with 2 widebands and am positive with the setting. the numbers don't lie. It seemed strange that i would be taking away fuel at first to me also.

OPEC

In response to the + numbers on low boost, since I am hitting full boost at 3500 and I have no way of controlling when the secondaries start putting in fuel. I have to throw in extra fuel under low load to compensate for the 500 or so rpm's before the secondaries come online. Untill I can get a computer in the car that will let me control the secondaries based on boost, I have to live with some crappy fuel economy. I really should be taking fuel away under the low settings but I have to do this for the boost that I am running on the stock computer.

It took me a long time of fine tuning to get the numbers where they are set. Before I set the low settings that rich I was getting some detenation or what sounded like detenation right about 4K. I could only get it to do it in 3rd and 4th. It took a really keen eye watching the wideband to see it go lean for that fraction of a second, and it wouldn't do it everytime, which made it even harder to pin it down. But ever since riching up the low setting I haven't had it happen. After having a wideband and tuning with it, I realize why people say that you can't tune without it, cause it is true.

I know that i might be going out on a limb here, but I would have to say that having a wideband should be like one of the first major purchases after doing exhaust and intake. I have mine on the car all the time, it sits right on my steering column. It is a really nice feeling to know exactly what you A/F ration is everytime you are under boost. The peice of mind for me is well worth the money.