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Thread: B3601 value for E10

  1. #1
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    Default B3601 value for E10

    i have it set for 14.12 afr.... so it changes my B3647 accordingly...

    *NOTE* I RUN IN OLSD....NO MAF

    question is....

    should i leave my crusing and part throttle @ 14.39 afr and my wot @ 12.07 ( changed to this automaticly when i entered 14.12 (stoich for E10) afr in B3601 )

    OR

    leave my crusing and part throttle afr @ 14.91 and my wot afr @ 12.50 while still maintaining 14.12 afr in B3601 ( B3601 set to 14.63 afr )

    remember E10 is roughly 1/2 point fatter in AFR....

    ALSO, E10 is at every gas station now as far as i know

    THOUGHTS????

    THANKS
    Last edited by WHYTRYZ06; February 5th, 2010 at 02:52 PM.
    01 Z06, 4L60E CONVERSION, L92/L76 TOP END, 72# LS3 INJECTORS (THANKS FIC), DRY NITROUS, COS5

  2. #2
    Lifetime Member 5.7ute's Avatar
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    The percentage increase for PE or WOT should be a constant, so I would leave it as is.
    The Tremor at AIR

  3. #3
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    leave WOT @ 12.07 AFR....????
    01 Z06, 4L60E CONVERSION, L92/L76 TOP END, 72# LS3 INJECTORS (THANKS FIC), DRY NITROUS, COS5

  4. #4
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    Quote Originally Posted by WHYTRYZ06 View Post
    leave WOT @ 12.07 AFR....????
    12.07 x 1.035 = 12.49AFR

    12.07AFR on E10 is equivalent to about 12.49AFR on E0 (regular fuel).

    Source: http://forum.efilive.com/showpost.ph...&postcount=169

  5. #5
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    Quote Originally Posted by Epox4life View Post
    12.07 x 1.035 = 12.49AFR

    12.07AFR on E10 is equivalent to about 12.49AFR on E0 (regular fuel).

    Source: http://forum.efilive.com/showpost.ph...&postcount=169
    rite so leave it at 12.07 afr... for E10
    Last edited by WHYTRYZ06; February 6th, 2010 at 01:01 PM.
    01 Z06, 4L60E CONVERSION, L92/L76 TOP END, 72# LS3 INJECTORS (THANKS FIC), DRY NITROUS, COS5

  6. #6
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    I know this is an old thread, but I encourage anyone who's tuning for E10 to actually test the fuel they use. A chemist at a racing gasoline blender told me a couple of years ago that most of the ethanol blended gasoline on the retail market is actually somewhere between 7 and 8% ethanol rather than 10%. I've also tested several samples of ethanol blended gasoline from premium gas pumps in my area and sure enough, they all were about 7-8%.

    As a result I assume it's all E7 and set my stoic value at 14.2:1 = lambda 1.0.
    Hib Halverson
    just another f'ing "Tuner In Training"

  7. #7
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by Hib Halverson View Post
    I know this is an old thread, but I encourage anyone who's tuning for E10 to actually test the fuel they use. A chemist at a racing gasoline blender told me a couple of years ago that most of the ethanol blended gasoline on the retail market is actually somewhere between 7 and 8% ethanol rather than 10%. I've also tested several samples of ethanol blended gasoline from premium gas pumps in my area and sure enough, they all were about 7-8%.

    As a result I assume it's all E7 and set my stoic value at 14.2:1 = lambda 1.0.
    +1

    I agree...

    and the test kits are cheap.

  8. #8
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    "Test kit"? I didn't realize there was such a thing.

    I guess I made my own test kit. I bought a graduated cylinder from Amazon. I put 100 ml of pump gas in it then add 10ml of water. Shake it up then let it sit. After a while the ethanol and water "settle out" at the bottom. Say you have 100 ml of gasoline "floating" on 18-ml of ethanol and water that's about "E8".
    Hib Halverson
    just another f'ing "Tuner In Training"

  9. #9
    Joe (Moderator) joecar's Avatar
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    Yep, that's what the test kits are for about $5, some include a water soluble dye to better see.

  10. #10
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    I'm about to start Tuning my 03 sierra and am wondering... do I need to change my B3601 to 14.12 - 14.2(depending on alcohol content) before I start tuning? I'm assuming yes.

    If yes, do I then need to change the information in the software for my dual LC-1 Widebands pertaining to lambda?

    Thanks
    2003 GMC Sierra Denali
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