SAFC TUNING INSTALL/TUNING ?'s
SAFC TUNING INSTALL/TUNING ?'s
I need help tuning my safc II. I was reading vadims post about tuning safc and i really dont understand what to do...
Also is there any diagrams how to connect the wires? I tried googling it but cant find it. Apexi site is also not loading for me right now.
I understand that i need to get a wideband o2 sensor but where do i hook this up to once i get it?? Im not going to dyno tune it, just connect it to the laptop and take the car out for a run.
Also is there any diagrams how to connect the wires? I tried googling it but cant find it. Apexi site is also not loading for me right now.
I understand that i need to get a wideband o2 sensor but where do i hook this up to once i get it?? Im not going to dyno tune it, just connect it to the laptop and take the car out for a run.
very simple.
to tune: you log your data, and adjust the settings on V/Safc until your wideband logs read 13.5 a/f across the rpm range for an n/a motor. that should give you the best fuel mix at each RPM (as a base) then you can adjust a/f leaner/richer according to the dyno chart/torque graph shape.
why not use the stock narrowband with a/f gauge?
yes the stock sensors give you an idea of how your a/f is behaving. In Open Loop
but once the engine goes past 3Krpms and more than 40% throttle is applied the ECU sends engine into Closed Loop state, where it is only controlling a/f ratio based on what the MAF voltage reads and based on the stock preloaded factory fuel map, the o2 sensor data is just not used past 3K that's why using it is pointless. watch what happens to the narrowband a/f guage when the rpms at like 5K, it reads nonsense if compared to WBo2 results at 5K rpms
wideband always keeps displaying your REALTIME a/f ratio
why not tune by butt dyno?
you can but it will not be as accurate as with KNOWING and MONITORING your Actual A/F ratio.
motor runs best when there is the ideal fuel +air mix based on the mods you have. i.e. going from one set of headers to another will totally change your a/f ratio i.e. car's responce
when you don't have the ideal mix you will notice a slowing down and speeding up feeling when your motor revs out (you normally notice it in the higher gears like 3rd or 4th) with the ideal A/F the motor will rev a lot faster.
the MORE MODS you have the MORE TUNING you need to do. that's the rule. stock tuning on a stock car is ok, but also could be tweaked for a little gain.
hope this helps with tuning
any questions?
-Vadim
to tune: you log your data, and adjust the settings on V/Safc until your wideband logs read 13.5 a/f across the rpm range for an n/a motor. that should give you the best fuel mix at each RPM (as a base) then you can adjust a/f leaner/richer according to the dyno chart/torque graph shape.
why not use the stock narrowband with a/f gauge?
yes the stock sensors give you an idea of how your a/f is behaving. In Open Loop
but once the engine goes past 3Krpms and more than 40% throttle is applied the ECU sends engine into Closed Loop state, where it is only controlling a/f ratio based on what the MAF voltage reads and based on the stock preloaded factory fuel map, the o2 sensor data is just not used past 3K that's why using it is pointless. watch what happens to the narrowband a/f guage when the rpms at like 5K, it reads nonsense if compared to WBo2 results at 5K rpms
wideband always keeps displaying your REALTIME a/f ratio
why not tune by butt dyno?
you can but it will not be as accurate as with KNOWING and MONITORING your Actual A/F ratio.
motor runs best when there is the ideal fuel +air mix based on the mods you have. i.e. going from one set of headers to another will totally change your a/f ratio i.e. car's responce
when you don't have the ideal mix you will notice a slowing down and speeding up feeling when your motor revs out (you normally notice it in the higher gears like 3rd or 4th) with the ideal A/F the motor will rev a lot faster.
the MORE MODS you have the MORE TUNING you need to do. that's the rule. stock tuning on a stock car is ok, but also could be tweaked for a little gain.
hope this helps with tuning
any questions?
-Vadim
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