S-AFC Tuning

Information on the naturally-aspirated KA24E and KA24DE engines.
ExoniX
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Got my S-AFC today and im gonna be running 370 CC injectors on my KAT Setup, Now i was thinking, Can i set the Lo Thro and Hi Thro to be the same ? And what type of air flow corrections would be good for my setup ?As in Points1000 - or + whatever2000 - or + whateverand so on till 8000 rpms.. Can someone help me out here ? Also what could i do for the air decelaration settings..This is for 370 CC's on a KAT, Thanks!


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WAbernethy
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I just got mine yesterday and have the same ?'s. Basically tho you want to just compensate to the negative for your larger injectors. I set mine to -50% on the low side and -40%(both linear) on the high side as an intial setup. But I'm running 450cc injectors. It runs a bit rich b/c the unit will only go down by 50%. I'll lean it out a bit after I get something to tune it better with. Can't help you with the decel setting. U get a gen II SAFC?

ExoniX
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Nah dude, The one before, But I dont have the 370's in yet thats the thing, So far this is what i set up, I know it doesnt make a damn difference in my current injectors since they cant flow anymore heh but here we go1000 : +O Hi - 10 Lo2000 : +25 Hi - 15 Lo3000 : +50 Hi - 20 Lo4000 : +48 Hi - 20 Lo5000 : +32 Hi - 20 Lo6000 : +26 Hi - 20 Lo

And my Lo throttle is 5% and hi thro is 6 %This sound good to anyone ?

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WAbernethy
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I don't really know what to tell you about the actual percenatges that you are modifing by. Looks pretty drastic, probably more than I would do. As far as your Hi and Lo goes, That is really not the way you want that set. You'd be better off leaving it at 10 and 50. The reason being that when you push the accelerator down, as it crosses from 5 to 6 percent it will change from -15 or 20% to +25 or 50% instantly. I'd think that would be a little much to happen all at once for your engine and ecu. Might cause it to choke for a sec or something. When you set them farther apart, it averages them out in the between area so that it's a smoother transition. At least that's how it seems to me. I'm still trying to figure out how it all works.

ExoniX
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Im not running any negative numbers those dasher are just to seperate, and i changed the TH point to 5 and 15

gyfer
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I am planning getting SAFC. Any big different between the SAFC-1 and SAFC-2 ?

Exonix, would you mind list your basic configuration ?

And also, who have instruction/diagram to tap into ECU wiring ?

Thanks.( oh yeah, I searched.. )

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WAbernethy
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gyfer wrote:I am planning getting SAFC. Any big different between the SAFC-1 and SAFC-2 ?


About a hundred bucks:pface There are supposed to be some improvements over the gen1 model but I almost wish I had kept my extra 100 bucks and gotten the older one. Dosen't seem to do much more except for the 200 rpm increments instead of 500 and the "single button control" whoopie, that thing pisses me off anyway.

The wiring info will come with it. It's really simple, just make sure you use the WD from your FSM to double-check that you have the right wires. The diagram they give you is kinda shady, imo.

gyfer
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WD from FSM ?Cool.. will ask you if have any question ? Mind I have your email address ? :D

So, I guess I will get the SAFC-1. Cheapest I found is $280. Any better idea ?

What setup you are running ? I plan 5lbs first on my KA-T. Do you use any raising rate regulator ? Injectors size ?

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WAbernethy
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Sorry, for all you common folk:D(jus playin'), that's Wiring Diagram and Factory Service Manual. The Gen I's are going for 230 bucks on e-bay so save yourself some dough and get it there. I got my Gen II at titanmotorsports for 330 bucks with free S/H (best deal I could find). I am running some 450cc DSM injectors that I picked up for like 20 bucks. I had to wire in some 10 ohm resistors and shave the little tabs from the connectors but other than that they fit right in. I don't have a FPR (not really needed here), but I do have a Walbro 255lph pump. I'm still N/A but am hoping to slap in the ol' manifold and turbo and other extraneous crap in another week or two.

E-mail me through NICO if you like.

SloS13
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i got a mint condition used Gen 1 for $175 :)

gyfer
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You can wire resistors to injectors if the injectors ohm is different ? interesting.....

I thougt DSM injectors is side feed ? ( I have KA-E, top feed )

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oi138
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no dsm injectors are top feed. Either he used a new rail or has a sohc.

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WAbernethy
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Maybe they're not DSM, just going by what the guy I got them from said, I thought. I know jack about DSM's anyway. I'm innocent man, hearsay won't hold up in court, you can't convict me!!

They were low impedance so I made them high impedance.

badass240sx
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I picked up my S-AFC II on e-Bay for $295 shipped. You just have to be patient and look around :)


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