Home
What's new
Latest activity
Authors
Store
Latest reviews
Search products
Forums
New posts
Search forums
What's new
New posts
New listings
New products
New profile posts
Latest activity
Members
Current visitors
New profile posts
Search profile posts
Log in
Register
Cart
Cart
Loading…
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Search titles only
By:
Menu
Log in
Register
Navigation
Install the app
Install
More options
Change style
Contact us
Close Menu
Forums
Mustang Forums
2011-2014 Mustangs
2011-2014 Mustang Talk
Track app afr readings?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Shaun@AED" data-source="post: 13170181" data-attributes="member: 32381"><p>As KevinP pointed out, the major difference between dyno Air Fuel readings and Track Apps is the difference in Stoich values.</p><p></p><p>For reference:</p><p>Measured Air Fuel = Stoich * Lambda</p><p></p><p>Since *most* dyno widebands are calibrated for Pure gas the Air fuel on the dyno sheet will be leaner than the *actual* air fuel given 10% Ethanol.</p><p></p><p>This is why we tune with Lambda. Lambda never changes, 1.0 = Stoich, regardless of fuel used. O2 sensors always *find* true stoich, regardless of fuel.</p><p></p><p>I have an ECM 1500 Wide Band that prints the Air Fuel graph on the dyno sheet (calibrated for 14.64 stoich) and an ECM 1600 Lambda meter for tuning (only reads Lambda). Same goes for logging the 2011+ Fords, I only care about Lambda. Air fuel is simply a calculation based on Lambda and *programmed* Stoich.</p></blockquote><p></p>
[QUOTE="Shaun@AED, post: 13170181, member: 32381"] As KevinP pointed out, the major difference between dyno Air Fuel readings and Track Apps is the difference in Stoich values. For reference: Measured Air Fuel = Stoich * Lambda Since *most* dyno widebands are calibrated for Pure gas the Air fuel on the dyno sheet will be leaner than the *actual* air fuel given 10% Ethanol. This is why we tune with Lambda. Lambda never changes, 1.0 = Stoich, regardless of fuel used. O2 sensors always *find* true stoich, regardless of fuel. I have an ECM 1500 Wide Band that prints the Air Fuel graph on the dyno sheet (calibrated for 14.64 stoich) and an ECM 1600 Lambda meter for tuning (only reads Lambda). Same goes for logging the 2011+ Fords, I only care about Lambda. Air fuel is simply a calculation based on Lambda and *programmed* Stoich. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Mustang Forums
2011-2014 Mustangs
2011-2014 Mustang Talk
Track app afr readings?
Top