When tuning safc/vafc... how do u know ur air fuel ratio?

 

You dont unless you have a seprate wideband o2 and controller. You can grab a cheap wideband from innovative called the LC-1 and use a cheap air/fuel guage like one from autometer. If you want to know more about wideband controllers simply search the site.

 

you gotta get a wideband o2....don't get a autometer those are narrowband like the stock o2...WIDEBAND o2..

 

do all people get wideband??? how do they tune it without it?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AZNracerx1989 &raquo;</TD></TR><TR><TD CLASS="quote">do all people get wideband??? how do they tune it without it?</TD></TR></TABLE>

They don't

 

can u guys list sites where i can buy it cheapest?

 

I just had one for sale but.

http://www.zeitronix.com
http://www.plxdevices.com

search.

 

so a safc/vafc and a wideband o2 sensor kit is all i need to tune?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AZNracerx1989 &raquo;</TD></TR><TR><TD CLASS="quote">so a safc/vafc and a wideband o2 sensor kit is all i need to tune?</TD></TR></TABLE>

Tune what? What is your setup?

 

tune the fuel curve... turbo

 

Well see, when you tune the fuel curve (with a MAP modifiying device), you're also tuning the ignition curve. The ECU uses the MAP and RPM as the two main inputs to the look-up tables for both fuel and ignition.

And now that you mention boost, no, this is not all you need. Do a search for VAFC Hack and read the countless number of threads that should hopefully steer you away from trying it.

What is your setup? Or do you not have one and are just trying to gauge how much 'stuff' its going to take to be boosted?

 

Im running 5 psi on b18b with a turbonetic t3 with FMU... runs very well. Just looking for better fuel management

 

on G2IC's Turbo guide, it says that 12 psi can be reached with an AFC hack because that is the limit of the MAP sensor

 

As I've said, search for VAFC Hack. If you feel that going this route would be wise after reading several threads where in people talk about blown ringlands and such from over advanced ignition timing - then just do it.

For every one person who says something good about the Hack, you'll find 5 wanting to say something bad about it and to go with "better fuel management" like Uberdata or Crome.

Even the guy who 'invented it' now gives it the thumbs down....

 

so whats the chepeast way to have fuel management?? Greddy blue box??? i saw some other mechanical fuel controlers but i forgot the website.

 

Look into a chipped ECU.

just got one for a turbo 98 ex (forged) after running the VAFC. All I can say is don't run an AFC. Its cheaper and better to get a modified ECU. With the harness and the ECU it was $250 and it came with a basemap. There was no cutting of anything. Its actually easier to install than the VAFC too.

http://www.phearable.net/

I don't know what is required to chip your particular app but check above. its by FAR better than the VAFC. But if you decide to go that route I have a VAFCII for sale.

 

do those ecu's come with chips? where u buy a burner to program

I live in colorado too (lakewood/denver)

 

YOU would only be purchasing an ECU that was chipped and ready for Uberdata/Crome or the like. You would not be purchasing a burner to program the thing because you wouldn't be programming it. You would instead take it to a tuner to have them burn the program.

 

The ECU comes with a chip and a basemap tuned for your application. You will need to list your setup when you order.

On our car the basemap worked really really well and have been driving on it untill we get to the tuner in Denver.

I would go this route if I were you. I have gone thru all the other hacks and it doesnt' compare. There is a list of supported engines/ecus on the phearable site, check and see if yours is listed.