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Thread: Fuel Density

  1. #1
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    Fuel Density

    Right below the stoich table is a fuel density table with a value of 730. What is this and should it be changed at all depending on the type of fuel you are using? i.e. E10 or E85
    2016 Hellcat Challenger, automatic, black on black with brass monkey wheels

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  2. #2
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    It adjusts the fuel readout on the dash if you use different size injectors.

  3. #3
    Tuner 07MontRedcp's Avatar
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    Yes.

    BJK
    APS TT 630 rwhp/654 rwtq @ 9 psi
    '07 C6, TR6060 conversion w/Z06 ratios. DTE Stage 4 Quaife Diff w/brace (3.73). Z06 Brakes, mild turbo cam & dual springs (222/222, LSA 115, .581/.581), LS9R clutch, LG GT2 Coilovers, Autometer Cobalt Fuel gauage, Progressive Alky Controller, and e-Boost2 Controller. PFADT poly bushing for control arms and Sports sway bars. MGW shifter. 3" B&B Fusion. RSI Stage 1.5 fuel system. RX dual valve catch can.

  4. #4
    Tuner 07MontRedcp's Avatar
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    Quote Originally Posted by IJ. View Post
    It adjusts the fuel readout on the dash if you use different size injectors.
    That is what most everyone thought when this feature first became available, but in fact it has to do with how any given injector's flow rate changes with a change in fuel density.

    BJK
    Last edited by 07MontRedcp; 12-12-2013 at 10:42 PM.
    APS TT 630 rwhp/654 rwtq @ 9 psi
    '07 C6, TR6060 conversion w/Z06 ratios. DTE Stage 4 Quaife Diff w/brace (3.73). Z06 Brakes, mild turbo cam & dual springs (222/222, LSA 115, .581/.581), LS9R clutch, LG GT2 Coilovers, Autometer Cobalt Fuel gauage, Progressive Alky Controller, and e-Boost2 Controller. PFADT poly bushing for control arms and Sports sway bars. MGW shifter. 3" B&B Fusion. RSI Stage 1.5 fuel system. RX dual valve catch can.

  5. #5
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    Quote Originally Posted by 07MontRedcp View Post
    That is what most everyone thought when this feature first became available, but in fact it has to do with how any given injector's flow rate changes with fuel density.

    BJK

    so what is the fuel density of E10 vs. pure gasoline which I assume is the value given as a standard in hp tuners?
    2016 Hellcat Challenger, automatic, black on black with brass monkey wheels

    10.13@ 140 DA 5000 feet
    2.75 pulley, tune, drag radials. 10 percent lower od crank pulley, 1050 ix. off road mid pipe. tune

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    Quote Originally Posted by 07MontRedcp View Post
    That is what most everyone thought when this feature first became available, but in fact it has to do with how any given injector's flow rate changes with a change in fuel density.

    BJK
    So the mouse over description " Fuel Density: Fuel density used in Fuel Used Calculation eg. for instrument cluster." is incorrect then?

  7. #7
    Tuner 07MontRedcp's Avatar
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    No, the fuel used calculation will be in error if it is using the density number for say gasoline and you're running E85.

    BJK
    Last edited by 07MontRedcp; 12-12-2013 at 11:34 PM.
    APS TT 630 rwhp/654 rwtq @ 9 psi
    '07 C6, TR6060 conversion w/Z06 ratios. DTE Stage 4 Quaife Diff w/brace (3.73). Z06 Brakes, mild turbo cam & dual springs (222/222, LSA 115, .581/.581), LS9R clutch, LG GT2 Coilovers, Autometer Cobalt Fuel gauage, Progressive Alky Controller, and e-Boost2 Controller. PFADT poly bushing for control arms and Sports sway bars. MGW shifter. 3" B&B Fusion. RSI Stage 1.5 fuel system. RX dual valve catch can.

  8. #8
    Tuner 07MontRedcp's Avatar
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    Quote Originally Posted by CactusG8 View Post
    so what is the fuel density of E10 vs. pure gasoline which I assume is the value given as a standard in hp tuners?
    Don't have those numbers, but they did show up in one of the threads on this topic.
    APS TT 630 rwhp/654 rwtq @ 9 psi
    '07 C6, TR6060 conversion w/Z06 ratios. DTE Stage 4 Quaife Diff w/brace (3.73). Z06 Brakes, mild turbo cam & dual springs (222/222, LSA 115, .581/.581), LS9R clutch, LG GT2 Coilovers, Autometer Cobalt Fuel gauage, Progressive Alky Controller, and e-Boost2 Controller. PFADT poly bushing for control arms and Sports sway bars. MGW shifter. 3" B&B Fusion. RSI Stage 1.5 fuel system. RX dual valve catch can.

  9. #9
    Tuner 07MontRedcp's Avatar
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    APS TT 630 rwhp/654 rwtq @ 9 psi
    '07 C6, TR6060 conversion w/Z06 ratios. DTE Stage 4 Quaife Diff w/brace (3.73). Z06 Brakes, mild turbo cam & dual springs (222/222, LSA 115, .581/.581), LS9R clutch, LG GT2 Coilovers, Autometer Cobalt Fuel gauage, Progressive Alky Controller, and e-Boost2 Controller. PFADT poly bushing for control arms and Sports sway bars. MGW shifter. 3" B&B Fusion. RSI Stage 1.5 fuel system. RX dual valve catch can.

  10. #10
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    Quote Originally Posted by 07MontRedcp View Post
    No, the fuel used calculation will be in error if it is using the density number for say gasoline and you're running E85.

    BJK
    Thanks for that!
    Follow up question is this scaled via the Stoich table if you run a Flex Fuel Sensor?

    Otherwise the Cluster will always be out if it's set for Gas and you run e-??
    Last edited by IJ.; 12-12-2013 at 11:44 PM.

  11. #11
    Tuner 07MontRedcp's Avatar
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    From what I was able to scrounged up on the internet it appears the E10 is .791 gmL at 20*C.

    BJK
    Last edited by 07MontRedcp; 12-13-2013 at 12:23 AM.
    APS TT 630 rwhp/654 rwtq @ 9 psi
    '07 C6, TR6060 conversion w/Z06 ratios. DTE Stage 4 Quaife Diff w/brace (3.73). Z06 Brakes, mild turbo cam & dual springs (222/222, LSA 115, .581/.581), LS9R clutch, LG GT2 Coilovers, Autometer Cobalt Fuel gauage, Progressive Alky Controller, and e-Boost2 Controller. PFADT poly bushing for control arms and Sports sway bars. MGW shifter. 3" B&B Fusion. RSI Stage 1.5 fuel system. RX dual valve catch can.