AFR for stock 93 SS

Heads, valves, pistons, rods, crankshaft, etc...

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vica153
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AFR for stock 93 SS

Post by vica153 »

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.
rallysam
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Post by rallysam »

AFR is all over the place. Here are some typicals for me:
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
dzx
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Post by dzx »

That seems rich at 11.
///M
'93 Legacy SS - part out
rallysam
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Post by rallysam »

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.

Image
Image
Image
Image
'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
dzx
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Post by dzx »

sorry, i was drunk and read that as 11 at cruising not wot.
///M
'93 Legacy SS - part out
Subtle
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Post by Subtle »

You're not drinking and posting at the same time :shock:
Subtle (normally aspirated engines suck):
05 Legacy GT Wagon with Cobb chip.
62 Alfa Romeo Spider- had a 1.6 L with 80 hp, now 2 L with 160 torque. Curb weight 2050 lbs.
93 Leg Twgn fmic, vf34, etc. ((sold))
dzx
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Post by dzx »

I try to stay away from the internet and phones when drinking but sometimes I don't quite follow through...
///M
'93 Legacy SS - part out
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