E85 vs 93 octane
I don't understand why people continue to use AFR for tuning is beyond me. I think a lot of it is people just don't understand. That and Lambda is the metris system and AFR is imperical.
I don't know who needs to hear this, but go Lambda and forget you ever heard of AFR.
I don't know who needs to hear this, but go Lambda and forget you ever heard of AFR.
I don't understand why people continue to use AFR for tuning is beyond me. I think a lot of it is people just don't understand. That and Lambda is the metris system and AFR is imperical.
I don't know who needs to hear this, but go Lambda and forget you ever heard of AFR.
I don't know who needs to hear this, but go Lambda and forget you ever heard of AFR.
Thread Starter
10 Second Club
Joined: Nov 2005
Posts: 933
Likes: 75
I have to use Lambda because of the injector scaling.
If you started tuning with AFR, and switched to Lambda, it gets confusing because in a tune, let's say you want WOT to be .79 L. That's still referencing AFR at 11.5. In the same tune, it asks you to select numbers for PE which are referencing AFR, 14.68/1.27=11.5. Then throw in E85 and all the other fuels.
If you started tuning with AFR, and switched to Lambda, it gets confusing because in a tune, let's say you want WOT to be .79 L. That's still referencing AFR at 11.5. In the same tune, it asks you to select numbers for PE which are referencing AFR, 14.68/1.27=11.5. Then throw in E85 and all the other fuels.
I honestly think it's because people hate the metric system so much.
Lambda is the only thing in the metric system that I use.
TECH Addict
Joined: Dec 2004
Posts: 2,177
Likes: 627
From: Florida
It’s just an arbitrary unit, really. If you leave it on gas scale it will still work ‘fine’ if you use 14.6 as stoic.
all gauges just convert internally from lambda to ‘display units’ not really any differently than voltage to your choice of arbitrary pressure units for transducers.
I’ve been trying to convert to lambda but afr is just so ingrained in my thought process I’m constantly converting gas afrs to lambda for reference.
all gauges just convert internally from lambda to ‘display units’ not really any differently than voltage to your choice of arbitrary pressure units for transducers.
I’ve been trying to convert to lambda but afr is just so ingrained in my thought process I’m constantly converting gas afrs to lambda for reference.
Well even then it's just a checkbox to show your AFR target as lambda, nothing else is really populated with lambda.
Metric? It has nothing to do with Metric vs Standard. Lambda is the ratio between the actual AFR and the stoichiometric AFR of the fuel, while AFR is just the ratio between the mass of oxygen and fuel.
