50BMG
Well-Known Member
I thought the same thing K4, but that's why I think he said "... you're relying on the ECU/Computer a lot". To wit, I think: Uh YEA! Don't we all!?! LoL...It will throw a code if the trims get anywhere near the car running lean.
Thanks Mike. I don't know exactly what all of those acronyms mean exactly, but I'm trying to learn. I really need to read more.I get that. If the car is tuned (stock) for E10, then going to E30 will cause the feed-forward lambda to be about 10% lean. The STFT works really quickly on these so it won't be lean for long. If it's a stock or Roush tune, it will pull timing in the meantime, though some tuners get rid of this protection for some odd reason.
What is a easiest/best way to get my car tuned to run different levels of E if I want to? Should this be done in coordination with a "performance tune" as in one of those remote mounted tuning devices which can be programmed with multiple tunes inside so that I can run straight gas/E30/E50/whatever as fuel availability make change depending on how far I am from home (there are many E85 pumps in my home area, but that might not be true for anywhere I may road-trip to).
Thanks Wildhorse. The first time I ran E30, I was coming off a road trip where I ran basically an E19 mix to get a cheap octane boost and I ran the tank down to very near zero before I did that 1st test.I MUST make a correction. I ran the tank dry. then added the 30% mix and drove it for a week.
STFT was bang on.
LTFT was around 15-16% (Previously I said 10%).
Still very acceptable.
I am also 2/3 spent on my 2nd full tank of E30 mix (93 octane gas & E85) right now, so I think the fuel that's currently in my tank is likely very "true" to the E30 ratio.
I know my car seems to love it thus far! That's only a seat of the pants assessment (which both my son and I notice) and semi-confirmed through the data using the cars Track Pack software.
I gotta get to the strip to see what she'll do!
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