Bluemustang
Well-Known Member
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- #1
Is the flex fuel tune running E a better performer than a straight 93 tune? I know that at least on the Lund FF tune, it won't advance timing beyond what a 93 tune does. So it won't allow more peak timing like an E85 tune does, nor will it ramp up timing like crazy down low like the E85 tune does.
But as far as 93 octane goes, not everyone's car is the same and not all 93 fuel is the same. So you may not always get the full timing advance that the 93 tune allows, just because the fuel isn't good enough.
I guess what I'm wondering is, will the flex fuel tune be a better performer (especially down low) than the 93 octane tune? I can see on my logs that I will hit the maximum base timing up top if I use ethanol on the flex tune. I won't get there running 93 octane. But in the lower rev range it's harder to tell.
I've been told that the flex tune is really a convenience tune, not an everyday tune, even though some people use it for that. I get less than stellar results on 93 octane for whatever reason - guess the fuel just isn't that good. Was thinking about using the flex tune even in the winter time, maybe like an E30 or E40 mix so I can better timing up top and down low. Does my thinking make any sense?
But as far as 93 octane goes, not everyone's car is the same and not all 93 fuel is the same. So you may not always get the full timing advance that the 93 tune allows, just because the fuel isn't good enough.
I guess what I'm wondering is, will the flex fuel tune be a better performer (especially down low) than the 93 octane tune? I can see on my logs that I will hit the maximum base timing up top if I use ethanol on the flex tune. I won't get there running 93 octane. But in the lower rev range it's harder to tell.
I've been told that the flex tune is really a convenience tune, not an everyday tune, even though some people use it for that. I get less than stellar results on 93 octane for whatever reason - guess the fuel just isn't that good. Was thinking about using the flex tune even in the winter time, maybe like an E30 or E40 mix so I can better timing up top and down low. Does my thinking make any sense?
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