silverrotor

iTrader: (1)

Little confused on what Hi and Low Throttle position feature to put Into the S-AFC. What are Its functions exactly? Is It a standard number? Some details would be great.

Cheers!

"They are used by the S-AFC to calculate fuel corrections at various TPS readings (throttle positions) at each RPM. At TPS settings below the Lo-Thrtl point, fuel corrections are constant - this is good for letting the ECU operate properly in closed-loop mode. At TPS settings above the Hi-Thrtl point, fuel corrections are also fixed - good for compensating for a throttle pedal that doesn't go as high as 100% (such as caused by thick carpeting or floormats). At TPS settings in-between the two, the S-AFC always calculates a correction proportional to the Lo-Thrtl and Hi-Thrtl numbers. Close to the Lo-Thrtl point, the correction will be more like the Lo setting at that RPM; while close to the Hi-Thrtl point, the correction will be more like the Hi setting at that RPM."



http://wac.addr.com/auto/obs/safc/safc.html

silverrotor

iTrader: (1)

Cheers!///I'm dumbfounded. Beautiful.

Aaron Cake

iTrader: (1)

You have a S4, so set the low throttle to 93%, and high throttle to 94%.

silverrotor

iTrader: (1)

Yea but couldn't the throttles be set on zero, for example. That way the S-AFC Is making fuel adjustments allthroughout the throttle position. By doing It this way you are maximizing (customizing) the piggyback to work according to what you Input at rather than having any fixed points?

silverrotor

iTrader: (1)

Besides, didn't you adjust my hi and lows to 10 and 90 the other day?

Aaron Cake

iTrader: (1)

The TPS on the S4 is not full range...ie. 100% on the TPS is about 1/4 throttle. So you want to set the S-AFC so that anything less than 1/4 throttle is "low", and anything more is "high". It's not the best solution, but it's the only solution besides swapping in the 89+ TPS (annoying).

wpgrexx

so why would uou say 94%, why not go 98 and 99%, than for sure it is hi past 1/4 throttle . just wondering what the difference is?

silverrotor

iTrader: (1)

?

DaleClark

iTrader: (55)

Wow, that Subaru site is really good!

BTW, I don't recommend the "blue wire" mod - DSM'ers have proven that it can load the output of the O2 sensor a bit and cause false readings.

Dale