Do you actively monitor knock retard?

Discussion in 'Generation 4 - General Discusson' started by b4black, Dec 2, 2019.

  1. b4black

    b4black SHO Member

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    Just wondering how everyone monitors knock retard. Do you ever look at it, or do you leave it to your tuner? Do you just look at OAR, or do you watch actual KR? Do you look at per cylinder, or the overall average? What device do you use - an OBD2 gauge (like Areoforce) or log scan or something else?

    I still learning how everyone tune their Fords. On my last car (GM), I'd watch KR. If I didn't see any, it was time for more timing or more boost. I don't see much discussion about KR here.
     
  2. SM105K

    SM105K Land Yacht Pilot Supporting Member

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    I monitor it through my Livewire. Since I run E30 I don't see hardly any knock at all...ever. However, I monitor knock like a hawk. Before I hammer down I let my car get fully get to temp, then blast off.

    Mine is set for global (overall) knock as well. Also on the SHO if you are getting a positive reading the computer is pulling timing.

    I really don't pay attention to OAR.
     
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  3. Jordan_R

    Jordan_R SHO Member

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    Always. Tune doesn't change, but the fuel you fill up with always is
     
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  4. FiveLeeter918

    FiveLeeter918 Ortiz Performance Sales Supporting Member

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    Since I'm individual cylinder knock monitoring I can't monitor through the handheld, but with E74 I haven't seen knock in a while.
     
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  5. Zpak

    Zpak SHO Member

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    I do monitor knock, and don’t call me a retard!
     
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  6. b4black

    b4black SHO Member

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    What is E74?
     
  7. Zpak

    Zpak SHO Member

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    At least by me, E85 is actually called ‘FlexFuel’ and as stated on the pump ranges from 51-74% Ethanol.
     
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  8. 802SHO

    802SHO Member

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    I monitor it with my Aeroforce Interceptor Scan Guage. 0827191955.jpg
     
  9. SM105K

    SM105K Land Yacht Pilot Supporting Member

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    I see what you did there.
     
  10. FiveLeeter918

    FiveLeeter918 Ortiz Performance Sales Supporting Member

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    74% Ethanol. It's what our pump E85 measures out at.
     
  11. FiveLeeter918

    FiveLeeter918 Ortiz Performance Sales Supporting Member

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    We have two different options, Flex Fuel (51-74) and then E85 (70-85). I personally think it's all the same and just the sticker is different, but people have claimed to get E80 from the "E85" stations compared to the "Flex Fuel" stations being closer to 60%, but my ECA gets 70-74% regardless.
     
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  12. b4black

    b4black SHO Member

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    Doh! I thought an E74 was what you measuring KR with, not the fuel. :nut:


    E85 = Flex Fuel. There is only one standard for the fuel, ASTM D5798.

    It originally had Ed70-Ed85 in the title. The letter "d" referred to the ethanol being denatured. Actual (undenatured) ethanol content was 68-83%. People selling the fuel were a little misleading calling at E85.

    In 2011, the spec began to refer to the fuel as Flex-fuel at the same time the allowed amount of ethanol change to 51-83%. The decrease in the minimum was to help cars start in the wintertime (more gasoline = greater vapor pressure.) Some places still call it E85, even though it can never (legally) contain 85% ethanol.
     
  13. FiveLeeter918

    FiveLeeter918 Ortiz Performance Sales Supporting Member

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    Yea it's all the same, I'm just reporting the stickers and how people seem to think once is magincally different over the other.

    We have plenty of places that test E85-E90 in town, but it's custom mixed and costs $4-5/gallon which isn't worth it for a 500hp car since you'll never see the true benefits. A 1200 hp Cobra, sure. 500hp Taurus, nah...
     
  14. b4black

    b4black SHO Member

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    Reason for asking is it seems many people here run aftermarket tunes, but don't/can't monitor knock. They get super hung up on matching their ethanol content to the name of the tune. "E30 must run exactly 30% ethanol." If they would watch knock, they would know if they are safe, regardless of the ethanol content.

    I was running E30 on my 93 octane tune. Currently running E15 on my E30 tune. I never see knock, so I will be advancing the timing.
     
  15. FiveLeeter918

    FiveLeeter918 Ortiz Performance Sales Supporting Member

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    there's a built in buffer, fuel trims should be able to keep fueling in place if allowed to do their job.

    Do you self tune?
     
  16. b4black

    b4black SHO Member

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    Yes, sort of. I tuned my 2002 GM car, which was very simple. With the Ecoboost, I purchased an aftermarket tune to get started (mainly to loosen up the torque nannies). I'd like to use HPtuners, to make small tweaks the overall timing, WOT AFR and boost.
     
  17. stripSHO

    stripSHO SHO Member

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    I keep KR and OAR up on my livewire at all times, and have it set to light the yellow LED if it hits like +4 or +5. 93 octane has proven to be pretty sketchy around here. Once the cold weather hit I had to try 6 different gas stations before my knock sensors would stop crying the blues.

    Part of me questions the GH tune, given the climate difference and the seemingly harmless points in the map that like to obliterate my OAR. I also recently started watching my fuel trims and I've seen them get as high as +15% (combined) in spots which isn't really acceptable to me but is probably to be expected from a canned tune developed on someone else's car 1200 miles away.
     
  18. stripSHO

    stripSHO SHO Member

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    But then again ever since I filled up with Sunoco my OAR is buried and the knock sensors are still adding timing like mad so who knows
     

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