s-afc2

[jetdog]

can any explain how/what every thing does on this cause my car has one and i have a man. and it tells me how to set it. but not what i should set it at and i dont have a logger or wide band but do have narrow band and the onley thing i have found out is if i take high th and put in the neg numbers the car runs alot better but have no idea what i am doing to the car.

 

[habitatguy187]

Is your car an auto or a manual? (auto have smaller injectors written into the ecu code)

 

[jetdog]

5 speed and was told not stock inj and i can hardly hear raido over fuel pump

 

[habitatguy187]

Your profile says you have 650 injectors, you really need to find out for sure or you could really hurt your engine, but it's basically a simple calculation. 650 (what you have now) divided 450 (what the stock injectors for your car are) = 1.44

So your new injectors flow 44% more than the stock injectors, so you will need to remove about 44% airflow throughout all rpm points. Really though before I even drove it I would pull the injectors (5 min job, did it today actually) and find out for sure what size they are, and if they are indeed 650s I would only pull about 41-42% airflow out until I could get something to log with just to be on the safe side and not blow anything up.

But basically what the safc does is hides airflow signal from the mas (mass airflow sensor) to the ecu, since the ecu is getting a lower reading of air it will open the injectors for a shorter period of time, making up for the difference in flow.

 

[jetdog]

how do i tell what they when i pull them and how do i pull about 41-42% airflow out. i took the HIGH-T to -19 all the way from 1k to 7k and is not going all way rich any more and ran better what do i need set the outher setings at i am a dumb a## with all of this and love the car and as u said i dont want to blow it up and also i am pushing 17lbs if that means any thing

 

[cheap90gsx]

The injectors will have a part number on it some where. Just type the part number into google.

 

[motozachl]

here is some good info. give this a read to gain more understand and setting up. hope this helps