Running E30 tune??

Discussion in 'Generation 4 - Performance Upgrades' started by mybigsho, May 15, 2019.

  1. mybigsho

    mybigsho SHO Member

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    Hey guy's, I am starting to run e30 tunes from Matt .. Just wondering how many of u
    run a flex fuel sensor.. I went to the track this past Saturday thinking i had plenty of e blend around e35 or so
    and i sent data to Matt and said there was some knock in the run to add more e.. I sent away for a tester to see what is in the pump by my house and should have tomorrow.. Should i calculate around e40?? I know this is a question for Matt just looking for some input and what others are doing..
    Thanks Scott.
     
  2. SM105K

    SM105K Land Yacht Pilot Supporting Member

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    Buy a E85 tester off Amazon and test the pump product yourself every time. All it takes is the tester and water and about 2 mins of your time. I test my E products out of the pump every time I get E product.

    https://www.amazon.com/REV-X-Super-...r&qid=1557928233&s=gateway&sr=8-2-spons&psc=1
     
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  3. ridered74

    ridered74 SHO Member

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    I first bought one of the manual ethanol test tube which allowed me to determine that the gas station I use is at 70% ethanol. Matt told me to aim for between 30-35% ethanol, so there is some wiggle room there. I did that for a few weeks, but ended up not feeling too great about guessing what my tank's overall ethanol content was when I had to switch between the E30 and the auto octane tune a few times when I wasn't near a gas station that had E85. It's impossible to know precisely how many gallons of gas are left in your tank, even if you run it down to 0 miles remaining you are still guessing, then when going back and forth and not knowing if what you have left is at E10 or maybe E16 it makes mixing a guessing game.

    I ended up buying the fuel it blue tooth sensor along with an ethanol content sensor off amazon, and was able to secure the aftermarket fuel line from SBS. I have been running it for a few weeks now and I like the piece of mind it gives me knowing exactly what my ethanol content is at all times.

    Originally I tried siphoning gas out of my tank to use the manual tester, but my pump hose wasn't long enough to reach the gas. If I was able to do that and test every single tank, I would have went that route.

    If you do get an inline sensor, be aware that it can take 10-15 miles of driving before the fuels mix and you get your final E mixture percentage. It freaked me out the first time I filled up with the sensor. I put the E85 in first, then put the 93 in, and for several miles it was showing E40 or above. I just drive it gingerly until the fuel finally does mix and the E % comes back down below 35.
     
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  4. mybigsho

    mybigsho SHO Member

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  5. b4black

    b4black Member

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    What your fuel trims, that will tell you if you ethanol content is off.
     
  6. mybigsho

    mybigsho SHO Member

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    I'll have to check..
     
  7. mybigsho

    mybigsho SHO Member

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  8. StealBlueSho

    StealBlueSho BJSHO

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    No... It gives you a round about idea... but nowhere close to accurate.


    Sent from my iPhone using Tapatalk
     
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  9. b4black

    b4black Member

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    Right, they will tell you if you're in the ball park. You don't need super precision. An "E30" tune can handle a range. It doesn't need to be dead nuts on.

    Also, if safer to overestimate what's left in the tank, when switching from E10 and E30. I assume three gallons in the fuel system when the gauge is near E.
     
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  10. StealBlueSho

    StealBlueSho BJSHO

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    The car can handle a range depending on the hardware.. if it was winter or cold out, I would be concerned with too much Ethanol causing fuel rail pressure issues... not enough and you can get some substantial knock...

    Agreed on the three gallons rule... Even when I am almost on E there always seems to be about 3 gallons in the tank.


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