max lean A/F while cruising/light load.
#1
max lean A/F while cruising/light load.
so, tuning to try and get a bit better gas mileage... what is a decent A/F to strive for while cruising.
i've been tuning at 65, 70, and 75mph. would like to improve my MPG (i work really far away).
i've seen someone posted "15.3". 16s. i've heard some cars (not evos) hit 17:1.
anyone?
i've been tuning at 65, 70, and 75mph. would like to improve my MPG (i work really far away).
i've seen someone posted "15.3". 16s. i've heard some cars (not evos) hit 17:1.
anyone?
#7
Evolved Member
iTrader: (30)
Lean misfire limit in an Evo is around 17.5:1 AFR and/or 47* of timing (while cruising).
The thing about EGT and lean out of boost is it doesnt hurt anything. There isnt enough heat energy to do damage out of boost. As far as that goes, you run into a point of diminishing returns if you take too much fuel out since it cant create enough hp to cruise efficiently.
That being said I usually target around 16.2-16.6:1 for cruise.
The thing about EGT and lean out of boost is it doesnt hurt anything. There isnt enough heat energy to do damage out of boost. As far as that goes, you run into a point of diminishing returns if you take too much fuel out since it cant create enough hp to cruise efficiently.
That being said I usually target around 16.2-16.6:1 for cruise.
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