I have read thread after thread on the install and setting of a S-afc, hi-lo all that. Tps, boost rewire.

Ok, so if I get the car on the dyno will I be able to better set the hi/lo throttle %. Or is the 80-99%(many others like 97-99) just a setting. I have seen many different settings for this. I know that the s4 tps sucks royal *** but its what we got stuck with. Can I just install it per the Apexi instructions and have the dyno guy tune it? Seems like I can't even lean out the fuel with it becuase of the stupid tps. Only Hi and low. Then why does the s-afc have 12 points? Is that different?

How did you guys install and tune the s-afc? (tII s4's)Could the dyno guy tune the car without any additional creative adjustments on my part. I would for once love to do somthing to this car that didnt involve a whole lot of rewireing and creativness to get something to work right. Always sucks to have the very 1st ver. of a car.

Please any help would be great or just how you set up yours. Thanx.

 

I used these intructions when i installed my S-AFC.
http://www.1300cc.com/howto/how2/safc.htm
It was pretty easy but i dont like the fact that i had to hack up my factory harness. As far as settings i dont **** with them cuz i have no clue how to set it plus you need a wide ban 02 sensor like on a dyno
Its better to have it tuned at the dyno dont mess with this crap itll destroy your engine if your not carfull.
I havent been able to tune mine lately cuz its going to cost me 200 bucks to get it done.

 

Thanx. I will not be tuning it myself. I don't know how. I have seen that, it's the same as the apexi instructions. I like it better though cause its directly related to my car. But I have a problem with the tuning. I am going to get it on the dyno but, can I get a good tune out of the s-afc II with this install. Thats all I want. Thats why I got it. There seems to be a problem because the Tps sucks, then some people wire it to the boost sensor???? Im confused??? Is this even going to work?

 

asumming you followed directions and taped it into the TPS (you mentioned something about boost sensor??? which is kinda the other way)

then you want to keep the 97% low 99% high. or close. that is the setting for the S4 rx7. has nothing to do with the amount of fuel. that is a different area.

once you have those, and the other settings. you can have it tuned.

 

Well I want to follow the instruction, but a lot of people tap the boost sensor instead to have it boost dependent instead of the throttle. Is that better? Why do they do that. Well if going through the tps works then it doesnt matter.

On the low and hi? Does it make a difference if its 96/99 as to like 80/99 or even your 97/99? Why does everyone have a different setting for this? Would the car run better on one setting than another? Or does it depend on the car? Maybe it doesn't matter, some people jsut think its better? Thanx for all your help.

 

what you are doing is tell the AFC when to use high or low settings.

when you tune the S-afc. you tune both high and low. I think the new one has 12 points? well it really has 24. you tune 12 for high throttle. and 12 for low throttle.

for example at full throttle at 4000rpm. you might want to add fuel. but at 4000rpm cruising on the highway at low throttle. you'd want to take it away.

so 4000 high you add fuel. 4000 low you take it away.

now the problem with the S4 TPS is 30% throttle = 100% on the S-afc.

so by putting 97 / 99 on the S-afc. what you are doing is telling the afc that anyting over 30% throttle use the high settings. and anything under 29% use the low

by putting say 80 / 97. you are saying anything over 30% use high settings, and anything under say 20% throttle use the low. and anything between 20 and 30 will just be an average between the low and high settings.

on my car. the low and high settings are almost the same. so really I could put anything and it wouldn't even make a diff.

 

Oh. Ok. I havent installed it yet. I am going to wed. Then tune it later this week on the dyno. I just wanted to know what the deal was. Thanx for clearing things up. So I will set it 97/99. Thanx.

 

I dont understand the 97/99 part. Thats thr-point right? can one of you guys explain, since im kinda on the same point. All that registers in my mind regarding this is 10% lo 50% hi. Can one of you fellows help me to understand this better?

 

oooo...i have a s4 TII and i installed my safc II...i was wondering about my tps because my safc qwas reading lik 100% wen im on it lik 30%..so this is normal..also wen i have no throttlw it reads between 2-8%..how do i adjust this?

 

Mine does the same thing as far as it being 100% when I'm not on the throttle even half way. As far as the throttle position at idle, you can manually adjust that with the screw behind the uim. It's a very tiny flat head, that looks like it does nothing. If you need a more acurate description I may be able to dig up a picture and show you.

- Steiner

 

Well I was thinking of going with 99/100 for the throttle point setting. I know for a fact that if I am at WOT, the s-afc reads 100%. If I am crusing, depending on RPM it sometimes says 98-99 so I figure it would be better to only have high at 100%. Am I looking at this right?