Changing Race fuel? retune? or safe?
11-16-2016, 07:40 PM
#1
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Changing Race fuel? retune? or safe? i have a 416ci Ls3
-13.5:1 CR
-Hp Holley EFi V2
-active Knock sensors
originally tuned on F&L 113 octane
Since i cant get this fuel locally, besides ordering it in to the shop.
I can get VP 114 octane
or
Sunoco 114 octane
I know the F&L 113 fuel contains 2.7% oxygen
but could switching to another fuel cause any damage?
or should i get a retune?
-13.5:1 CR
-Hp Holley EFi V2
-active Knock sensors
originally tuned on F&L 113 octane
F&L SP-3 113 octane
PROPERTIES:
Research Octane Number: 118
Motor Octane Number: 109
Anti-Knock Index, (R+M)/2: 113.5
Specific Gravity at 60/60 /F: 0.725
Reid Vapor Pressure at 100 /F, psia: 6.0
Distillation Range at 760mmHg, /F (Initial Boiling Point: 93) (End Point: 264)
Oxygen, Vol. %: 2.7
Color: Light Green
PROPERTIES:
Research Octane Number: 118
Motor Octane Number: 109
Anti-Knock Index, (R+M)/2: 113.5
Specific Gravity at 60/60 /F: 0.725
Reid Vapor Pressure at 100 /F, psia: 6.0
Distillation Range at 760mmHg, /F (Initial Boiling Point: 93) (End Point: 264)
Oxygen, Vol. %: 2.7
Color: Light Green
Since i cant get this fuel locally, besides ordering it in to the shop.
I can get VP 114 octane
SPECIFICATION SHEET FOR C-14
(Typical Values) Specific Gravity: .696 @ 60°F
Lead: Yes
Color: Yellow
Motor Octane: 114
Reid Vapor Pressure: 5.16
Oxidation Stability (min.) 1440+
Distillation:
10% evap @ 168.1°F
50% evap @ 210.0°F
90% evap @ 217.2°F
E.P. @ 240.7°F
Production: Elmendorf, Texas USA
Availability: Sealed Drums
Rev: 07/00
(Typical Values) Specific Gravity: .696 @ 60°F
Lead: Yes
Color: Yellow
Motor Octane: 114
Reid Vapor Pressure: 5.16
Oxidation Stability (min.) 1440+
Distillation:
10% evap @ 168.1°F
50% evap @ 210.0°F
90% evap @ 217.2°F
E.P. @ 240.7°F
Production: Elmendorf, Texas USA
Availability: Sealed Drums
Rev: 07/00
Sunoco 114 octane
Sunoco® HCR™ Plus
Color Orange
Octane (R+M)/2 114
Research Octane 118
Motor Octane 110
Specific Gravity 0.736
Weight (lbs/gallon) 6.1
Reid Vapor Pressure 5.8
10% Evaporation 170
50% Evaporation 217
90% Evaporation 228
Stoichiometric Air/Fuel Ratio 14.8
Oxygen (weight%) 0
Ethanol (volume%) 0
HC Ratio 1.99
Lower Heating Value (Btu/Gallon) 113700
Lower Heating Value (Btu/Pound) 18600
Dielectric Constant 0.3
Leaded Yes
Color Orange
Octane (R+M)/2 114
Research Octane 118
Motor Octane 110
Specific Gravity 0.736
Weight (lbs/gallon) 6.1
Reid Vapor Pressure 5.8
10% Evaporation 170
50% Evaporation 217
90% Evaporation 228
Stoichiometric Air/Fuel Ratio 14.8
Oxygen (weight%) 0
Ethanol (volume%) 0
HC Ratio 1.99
Lower Heating Value (Btu/Gallon) 113700
Lower Heating Value (Btu/Pound) 18600
Dielectric Constant 0.3
Leaded Yes
I know the F&L 113 fuel contains 2.7% oxygen
but could switching to another fuel cause any damage?
or should i get a retune?
11-17-2016, 08:49 AM
#2
TECH Enthusiast
Oxigenated fuel will make more power than a typical leaded fuel. You'll also need to increase overall fuel to compensate.
Might as well retune it, bigger question is; if you switch fuel.. are you going to stay on that same fuel. Switching fuels all the time just will add to headache when it comes to tuning.
Might as well retune it, bigger question is; if you switch fuel.. are you going to stay on that same fuel. Switching fuels all the time just will add to headache when it comes to tuning.