Wideband and SAFC questions.
 

My questin is, does a safc monitor a/f ratio, and does my ecu 88 TII with the rtek 1.7 chip accept wideband, how exactly does all this stuff hook, up and how does the wideband work, and how does the wideband, and safc work together????


Sry for all the question, but alot of this stuff has been on my mind for a while now.

Thanx

the safc simply fools the AFM into thinking a different amount of air is getting in, it has nothing to do with a/f ratios. No idea on the rtec, though.

so wat is the purpose of the safc then? is it worth getting? And also does the wideband just monitor a/f ratio or can u make chages with it.... basicly do the wideband and safc to the same thing...

they both compliment each other.

The wideband simply MONITORS your Air / fuel ratios

The safc tricks the air flow meter into thinking it sees less / more air, therefore the ECU can add / remove fuel.

Ideally a standalone is your best option... but an safc is a simple and cost effective alternative. You won't get the results you would with a full standalone though.

So y does a wideband seem all difficult and stuff, i mean they have all the cables that hook to a computer and all that stuff too, wat is all that for, and does it just replace your factory narrowband o2 sensor?

I think wideband replaces the stock narrowband computer, I guess its also possibly to run both if you make a new bung for it, but there is little point. Widebands are used with standalones to more accurately read the a/f ratios. I don't think they work with a stock ECU, as they have a different voltage range.

I guess you can just replace your narrowband and take the little loss in gas milage huh, but wat is all the stuff for that comes with the wideband. How hard is it to tune with a safc, and has anyone used the new apexi safc neo?

I think it is fairly simple to tune with the SAFC, but I wouldn't recommend just starting to mess with your fuel if you've never done it before. Try to find someone that knows about tuning to help.
On a side note, from what I've read, widebands read on a 0-5V scale, while narrowbands use a 0-1V scale. I wonder if it would be possible to design a voltage divider circuit to bring the output of the wideband down to the stock narrowband ranges for use on with the stock ecu.

That would defeat the purpose of the wider band of the wideband then right?

Well, you would still have the regular output going to the gauge or whatever its for, but have the modified signal going to the stock ecu. Its just a thought...

ooo ok i see what your saying, i guess that would work in theory, are widebands really all that much better, because they sure do cost alot.... and wat is the best a/f ratio to shoot for when tuning the fuel system?

http://cgi.ebay.com/ebaymotors/PLX-M...QQcmdZViewItem

Here is something like you were talking about, says it sends narrowband data to your ecu, check it out...