safc 370 settings

[Mr. Spool]

I am wondering if the hi and low throttle settings on the safc are the way to adjust for 370cc injectors? Thanks and how would I go about doing it. one last question, when I am monitoring things I should not be able to see a change in the airflow monitor becouse of the type of air flow meter we have correct? thanks

[TokyoNights]

You need a wideband o2 sensor before you start changing settings,,or go to a dyno shop that has one.

[Mr. Spool]

I believe that i have a wide band o2 sensor, so do you know what I change to get the 27% correction for the 370 injectors. thanks

[tErbo b00st]

You need to read the directions and read up a lot, because if you do this wrong you could really fugg up your car.

The high and low settings are based on your thorttle input. You can store two different fuel maps based on throttle input (this is why the AFC sucks, JUST TWO!). So for example you can set the low setting at 30% and the high at 60% (i recommend these values anyways, on a DSM atleast). So at 30% and less throttle it uses one fuel correction map, and above 60% it uses another fuel correction map. Inbetween it makes its own decission on what to use.

I've never tuned one on an SR/KA yet, but from what i understand if you are running 370cc injectors on the KA, in order for them to be used like stock then you need to tune both the high and low fuel settings at -27% points accross the board (lean out the air/fuel ratio).

If you dont know how to do this please back away from the S-AFC and start reading something, anything.

[tErbo b00st]

Originally Posted by Mr. Spool

I believe that i have a wide band o2 sensor, so do you know what I change to get the 27% correction for the 370 injectors. thanks

I bet you dont have a wideband o2 sensor (if your not sure) , if it is the one with blinky lights that looks pretty (usually made by autometer) you can throw that peice of crap out. That is a narrowband and it pretty much worthless.

And do you know how to use the o2 sensor? besides green light good and red lights bad?

You really need to learn more about tuning or bring it to a shop, because you can blow up your motor if you dont do it right.

[Mr. Spool]

Thanks turbo boost, that is what I was looking for, I read the manual quite a bit but for some reason I just could not understand what the hi and low were for, I kinda guessed this but like you said if I am not real carfull I could loose my engine. I knew that a good point to start from was -27% for low but was not sure for high. I am going to have to guesse that the lower It is the leaner the mixture. the mixture on there right now is -13% and rises all the way to +19% kinda wierd huh. I guesse it makes it think that the injectors a smaller than they are when you are under full throttle at hich rpms.

the reason why I said I should have a wide band is that the sensor that I have has a dedicated o2 sensor and also registers from the fuel rail for injector duty. It appears pretty accurate and is deffinitly not a cheap autometer gauge. I am pretty sure that I can read it, the lower the mixture the richer. Ie 12.1 is richer than 14.1 and that 100% duty cycle is bad (thats what I am at, when I hit about 5000rpms in any gear). if I am pretty close on these things let me know. thanks.