What is a good AFR for Evo X?
When the car is warm it should be 14.5-15.2. Idles and cruising do fluctuate. As farad wot, most on pump are 91- mid to low 11’s and 93- high to mid 11’s.
What numbers are normal for a wideband?
Here is a generalized guide to give you a rough idea of where your target AFR or lambda value should be: -At idle or a steady cruise, it is normal for your gauge to display an AFR value of 14.0:1-15.5:1 or 0.95-1.05 in lambda.
What should my air fuel ratio gauge read?
So, in most cases, if you are cruising, it is ideal that your AFR should be at 14 because this will guarantee you better performance. But you can still do well with an AFR of 13 where the fuel combustion in your engine is richer.
What AFR is too rich?
CRUISING: 14 AFR Most stock to slightly modified engines will run just fine at an AFR of 15 and yield better MPG. If you prefer better PERFORMANCE then we suggest to run an AFR of 14 or even richer to around 13.
Is AFR 14.7 good?
The 14.7:1 ratio is perfect for idling and light throttle cruising conditions as it’s the most efficient mixture possible, meaning the best fuel economy and lowest emissions.
What does a AEM wideband do?
AEM’s Wideband UEGO (Universal Exhaust Gas Oxygen, pronounced “You-Way-Go”) Controllers are powerful, cost-effective tuning tools that allow users to accurately monitor the Air/Fuel Ratio (AFR) of an engine.
Is higher AFR lean or rich?
So what is meant by a rich or lean AFR? A lower AFR number contains less air than the 14.7:1 stoichiometric AFR, therefore it is a richer mixture. Conversely, a higher AFR number contains more air and therefore it is a leaner mixture. Leaner AFR results in higher temperatures as the mixture is combusted.
How rich is too rich AFR?
ACCELERATION: 12 AFR We refer to any fast turn of the throttle as being in an ACCELERATION driving condition. Again, we typcially like to run a richer AFR here to get the best performance. Best performance for most vehicles is around 12 AFR. Going too rich will cause a sluggish roll-on to get up to speed.
How lean is too lean air/fuel ratio?
In a real engine, a 14.7:1 air-fuel ratio is a little too lean. To compensate for incomplete combustion, and to reduce NOx emissions, modern automobiles are tuned to run more rich, sometimes dipping as low as 12:1 or even richer during high-load situations.
What should oxygen sensors read?
A properly functioning oxygen sensor will show a rapidly fluctuating output voltage between approximately 0.1 and 1.0 volts. The time taken for the voltage to change from 0.1 V to 1.0 V (referred to as the lean to rich response time) should be about 300 milliseconds.
What are normal O2 sensor readings?
The voltage generated from the O2 sensor should be from 0.1V to 0.9V, with 0.9V on the rich side and 0.1V on the lean side. If your readings are within this range, the O2 sensor is functioning properly.