Neo Safc help
 

Soo I currently own an 89 fc that I am in the middle an auto to manuel swap and have plans to install the Safc i purchesed for my 91 fc that i crashed. >.< I need to know if anyone in the community can either A) walk me thru the correct way to adjust my AFR for whatever mods i have installed at the time. Or B) tell me the adj that were made for your NA rx-7 and where they added timing/fuel/air or where they took it away. Hell i'd even go for option C) paying someone to tune it in the bay area of California. Please let me know if anyone has any suggestions on this. Thanks.

the best thing you can do is spend the $150-$200 on a AEM uego wide band o2 and work on getting a perfect tune using the wbo2 and feel.
Unless you know what you're doing trying to tune your car blind is like playing russian roulette.
you will make more power the leaner you go but, then you start compromising the engine longevity.

it isn't a 67 Chevy ... you cant tune by the color of the spark plugs. Wideband is worth every penny. Even environmental factors (average temp in your area, how you drive, ect.) can necessitate tuning changes.

If you don't have or can't afford a wideband, I'd recommend my settings.. Hi-Thr: 0 correction through the entire engine range, Lo-Thr [70% or less USING THE PRESSURE SENSOR wire as the throttle position input] do -7% from 0-3600 RPM. This is assuming you're using the SAFC primarily for fuel economy savings. [7% extra fuel economy is pretty awesome btw B)]

If you want to tune the Hi-Thr.. You need to get a wideband. Since it's NA, it would *probably* be OK, but it's not worth chancing it. Also, beware of colder weather if you drive say.. Up to Oregon - that will change your tune as well [perhaps setup a second tune, or just use the second one as a defaults tune]

Thank you for the sound advice. I dicided on getting the afg shortly after posting this. I'm going to attempt to tune the car with the afg but how safe is safe? What ratios make the best power.

You did buy a *wideband* o2 system and not just a narrow band gauge, correct?

13.0 13.5 afr

^_^