AFR for stock 93 SS
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AFR for stock 93 SS
What is the AFR on a 93 SS? Oviousvly its going to vary, but since people always say subarus run rich I was wondering about what the afr is.
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- Fourth Gear
- Posts: 1162
- Joined: Tue Oct 15, 2002 3:49 pm
- Location: London (originally from Wash DC)
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AFR is all over the place. Here are some typicals for me:
Cruising: stoich
WOT: 11 to 12 or so
Cruising: stoich
WOT: 11 to 12 or so
'00 Impr RS - sold
'91 Legacy Turbo 5MT - mothballed
13psi, TurboXS TBE, WRX IC, Hallman MBC, TurboXS FCD, KYB AGX, Phil's STI seat, SPT short shifter, David Carter hood, Zeitronix widebandO2, Kuhmo rally tires, STI IC spray, thanks:gearboxtech.com
'91 Legacy Turbo 5MT - mothballed
13psi, TurboXS TBE, WRX IC, Hallman MBC, TurboXS FCD, KYB AGX, Phil's STI seat, SPT short shifter, David Carter hood, Zeitronix widebandO2, Kuhmo rally tires, STI IC spray, thanks:gearboxtech.com
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- Fourth Gear
- Posts: 1162
- Joined: Tue Oct 15, 2002 3:49 pm
- Location: London (originally from Wash DC)
- Contact:
Well, that's what I get with the stock fuel system and higher-than-stock boost. Then again, with a car this old, the only thing you know for sure is that something IS broken... so I can't promise that 11 is normal.
These are all graphs of AFR (blue) over time as I did a bunch of different types of pull. Note that I go on and off throttle - Yellow is throttle position. When yellow goes up to 5, throttle is closed and fuel is cut. When yellow goes down to 0, that's a WOT pull.




These are all graphs of AFR (blue) over time as I did a bunch of different types of pull. Note that I go on and off throttle - Yellow is throttle position. When yellow goes up to 5, throttle is closed and fuel is cut. When yellow goes down to 0, that's a WOT pull.




'00 Impr RS - sold
'91 Legacy Turbo 5MT - mothballed
13psi, TurboXS TBE, WRX IC, Hallman MBC, TurboXS FCD, KYB AGX, Phil's STI seat, SPT short shifter, David Carter hood, Zeitronix widebandO2, Kuhmo rally tires, STI IC spray, thanks:gearboxtech.com
'91 Legacy Turbo 5MT - mothballed
13psi, TurboXS TBE, WRX IC, Hallman MBC, TurboXS FCD, KYB AGX, Phil's STI seat, SPT short shifter, David Carter hood, Zeitronix widebandO2, Kuhmo rally tires, STI IC spray, thanks:gearboxtech.com