Tuning my S-AFC

BKs50trimGST · 05-03-2005

I have the first S-AFC - the 5 knob one - i have a 50 trim and i was wondering what i should tune the car around - or at least give me ideas - shindley is going to tune it for me but maybe i could give him some help even though he probably won't need it. Or for later reference, just wondering how to work the thing basically. Do I need an A/F Meter for that or what?

**Kracka** · 05-03-2005

Take your car to Elite and have them dyno-tuned it with their wideband. I had pretty decent luck tuning with my EGT gauge and Logger. Before anything else, start reading up on tuning info/theories and go from there. Search Talk and Tooners, there should be plenty of info (also read RRE's basic tuning article).

**Shane@DBPerformance** · 05-03-2005

Sell the 5-knob and get a newer one. What size injectors are you running?

A//// Guy · 05-03-2005

Whats wrong with the 5 knobber?

**Shane@DBPerformance** · 05-03-2005

Quote:

Originally Posted by EclipseTurbo

Whats wrong with the 5 knobber?

It only has 5 adjustment points. It doesn't do anything different if you are at 5% throttle or 100% throttle, so if you need to run really rich or lean at some spot at WOT, it will do the same thing at that RPM when you are just trying to cruise. And it doesn't have as much of an adjustment range as the new ones, which can be a problem if you are running big injectors.

BKs50trimGST · 05-03-2005

i'm running 680cc injectors rihgt now, the pte delphi's

**Kracka** · 05-03-2005

Just to add, I really liked my knobby. It was very easy to use and I never had a problem with no hi/low throttle settings.

BKs50trimGST · 05-03-2005

for the future, i'm completely broke right now because of this turbo and stuff, which S-AFC do u recommend i get, and should i get a A/F meter or gauge? shindley told me he hates the gauges becasue they are always moving around when u drive or something like that, he said just get a A/F meter. - i have a datalogger - the one off of ebay.

**Kracka** · 05-03-2005

A/F gauges are worthless since they're designed for N/A cars. Watching the o2 voltage on your Logger will give you the same info.

Jakey · 05-03-2005

Are you sure he did not tell you to purchase a wideband A/F monitoring device?

BKs50trimGST · 05-03-2005

not that i remember no, he just wanted me to get a cheap A/F meter, like one off of xtreme but i never did because i thought my datalogger would solve the problem, but i dont know if it will until shindley takes a look at the thing, the datalogger i mean. i bought it and havent messed around with it yet.

**Shane@DBPerformance** · 05-04-2005

Quote:

Originally Posted by BKs50trimGST

i'm running 680cc injectors rihgt now, the pte delphi's

Does the 5-knob AFC only go -30 to +30? Because those 680s are about 34% bigger than stock, so you might already be screwed. The 5-knob can work ok, it you need to make small changes, but you are going to have to make drastic changes, unless you get your ECU chipped for the correct injector size.

A//// Guy · 05-04-2005

Or have the MAFT which can control injector sizing also... Like I have.

BKs50trimGST · 05-04-2005

what do u mean by drastic changes? will a datalogger help this at all? i dont know what it does right now so just wondering. should i just buy a newer S-afc or would dsmlink be better - right now i have no money and dsmlink i know wouldn't be in the future for me for a long time - and plus im not that smart when i comes down to all that stuff on dsm link and i wouldn't be able to understand half the shit anyways unless i was taught in depth. i think i should get a new S-afc - anyone out there know how to install S-afc's?

97GSXAWD · 05-04-2005

Once you get an AFC I would be willing to give you a hand putting it in. Hell, I may even be willing to part with the one I have in my lancer but I would have to think about that. The datalogger isn't going to help you control larger injectors. It is there to help you see what all is going on with the engine like injector duty cycle, timing advance, o2s, etc. Depending on far you want to go with the car in the future you may just want to use what you have for right now and save for Dsmlink as that has much more control over your tuning.

BKs50trimGST · 05-04-2005

that would be awesome, what kind of s-afc do u have in the lancer? help would be greatly appreciated, thanks for all the info.

**Shane@DBPerformance** · 05-04-2005

Quote:

Originally Posted by EclipseTurbo

Or have the MAFT which can control injector sizing also... Like I have.

That will work too, but it has the same side effect of causing the ECU to run too much timing at pump gas boost levels when you have injectors that are way too big for what is actually needed.