Ideal EGT and A/F?
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Ideal EGT and A/F?
Just installing some gauges and wondering where I want them to be. Car is a '92 SS with a Walbro, FCD, WRX IC and a 16g.
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Yeah, you can search here and on nasioc. I've posted charts before.
Did you get a wide band AFR system? If you just got a standard AFR gauge, it's not going to tell you much. It'll tell you whether you're running stoich at idle, but as soon as you accelerate it will go off the chart.
Did you get a wide band AFR system? If you just got a standard AFR gauge, it's not going to tell you much. It'll tell you whether you're running stoich at idle, but as soon as you accelerate it will go off the chart.
'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
I got a WB02. (AEM EUGO).
Well, I know where the values should be for the STi, but was not sure if they were different for the older leggys. (AFR optimum ~11:1, max egt 1650 +/-).
I did try some searching, but only found 'this is where I am at' type stuff, not ideals and maximums.
I'll look for charts sam
Well, I know where the values should be for the STi, but was not sure if they were different for the older leggys. (AFR optimum ~11:1, max egt 1650 +/-).
I did try some searching, but only found 'this is where I am at' type stuff, not ideals and maximums.
I'll look for charts sam
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All my image links were broken because Thawa's server is down. I fixed em. Here's the thread:
http://bbs.legacycentral.org/viewtopic. ... highlight=
Of course, no guarantee that what you see there is optimal. That's just the AFR's the stock computer, sensors, and fuel system decided to do on my particular car. Mind you, they may be creating different AFRs than stock due to higher boost and mass airflow. For that matter, no guarantees that any of them were working properly to start with
I get EGT's up to around 1400's or so, but that's because I put my EGT pretty far back in the exhaust system (where the 4 pipes come together). Everyone gets pretty different readings, most people higher than mine.
You're not going to find much of a consensus for AFR or EGT. It's different for every person's car, and you can't know what's "good" without a dyno. On this board, most people's setups are a total hack that just got tuned by butt (and shoot fireballs) Most tuning rules of thumb on this board come from the WRX guys on nasioc anyway, so you'd probably do better to believe what you find there. For example, the "keep EGT below 1600" rule (very rough rule of thumb and different depending on setup)
What you want is a good tune, anyway, which is usually pretty custom to that particular car. If you just want rough stuff, then you can definitely find more of that on here and Nasioc. That'll tell you if something is completely broken. But, you'll also be able to tell some of that based on the backfiring and shuddering and plugs. A dyno is the finer test - that'll tell you whether 12:1 or 10:1 is "right for you".
http://bbs.legacycentral.org/viewtopic. ... highlight=
Of course, no guarantee that what you see there is optimal. That's just the AFR's the stock computer, sensors, and fuel system decided to do on my particular car. Mind you, they may be creating different AFRs than stock due to higher boost and mass airflow. For that matter, no guarantees that any of them were working properly to start with
![Laughing :lol:](./images/smilies/icon_lol.gif)
I get EGT's up to around 1400's or so, but that's because I put my EGT pretty far back in the exhaust system (where the 4 pipes come together). Everyone gets pretty different readings, most people higher than mine.
You're not going to find much of a consensus for AFR or EGT. It's different for every person's car, and you can't know what's "good" without a dyno. On this board, most people's setups are a total hack that just got tuned by butt (and shoot fireballs) Most tuning rules of thumb on this board come from the WRX guys on nasioc anyway, so you'd probably do better to believe what you find there. For example, the "keep EGT below 1600" rule (very rough rule of thumb and different depending on setup)
What you want is a good tune, anyway, which is usually pretty custom to that particular car. If you just want rough stuff, then you can definitely find more of that on here and Nasioc. That'll tell you if something is completely broken. But, you'll also be able to tell some of that based on the backfiring and shuddering and plugs. A dyno is the finer test - that'll tell you whether 12:1 or 10:1 is "right for you".
'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