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SAFC questions

Old 11-23-06, 11:47 PM
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SAFC questions

I did search, but i didnt really find the information i want, so i hope you can help me out.

First, if I install a SAFC II, will it have any negative effects on my car (assuming i take my time and do it right)? I don't want to start hacking into my ECU wires and have something start to go wrong with the car because of it.

If i decide to remove it later, will the car return to the way it performed before?

Also does anyone sell a wiring harness i can buy so that i dont have to cut into the wires?

thanks.
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Old 11-23-06, 11:55 PM
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it will have negative effects on your car if you cut the wrong wires. Read the instructions carefully and make sure you are looking at the harness connectors properly. The factory service manual has a listing of what each pin does in I think the Emissions section. If you are unsure if you are looking at the connector the right way make sure that the black ground wires are the same as in the diagrams.

If you take the SAFC out (i've done that before) it won't be a big deal. You are just tapping into existing wires, with the exception of the airflow meter wire which you will be cutting completely and rerouting into the SAFC.
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Old 11-23-06, 11:57 PM
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you can leave the safc zeroed out and it'll behave like stock.

here's a rundown of how it works:
the mafs sends some a signal to the ecu. based on that signal, the ecu tells the injectors to flow a certain percentage. the safc intercepts the mafs signal and modifies it based on whatever you tell it. you set different values depending on rpm and throttle position. basically, you're making it lie to the ecu so it gives you the amount of fuel you want.

if you're running lean somwhere, increase the fake mafs signal so the ecu adds fuel. if you're running rich, decrease the fake signal. taking away fuel is dangerous though. you can destroy your motor forever.

i don't know of any commercially available harnesses for it, but some people have made them.

once you remove it, the car will be back to normal if you haven't already blown it up.

cheers!
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Old 11-24-06, 02:26 AM
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Thanks guys. Here are my plans for the car, tell me if there is something you, having more experience, would do differently.

I have a k&n cone filter, 3" racing beat turbo-back exhaust, street port, removed emissions, koyo aluminum radiator, walbro 255, and portet wastegate. I have been told by several people that the walbro should be enough, and i have been told by several that i am probably running lean and need more fuel. I have decided to find out for sure, so i plan on getting an Innovate LC-1 wideband, i just purchased a SAFCII, and i plan on some 720 seccondaries. I figure this way i will be able to see exactly what the a/f ratio is with the lc-1, and then be able to adjust it with the safc. Does that sound like a good plan, and if not what would you do different? Thanks for all the help guys.
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