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Using an E15 fuel with ethanol as the oxygenate we find:gramps wrote: ↑Thu Jul 30, 2020 9:42 am This fuel is highly oxygenated compared to most other fuels. 650 Holley set up for Sunoco Standard. Now required to run the Green E15, water temps up to 240 with this fuel. Due to the high oxygen content percentage I feel we are running lean. Any idea of the oxygen percentage number or jetting change amount? Have a call and email into Sunoco but haven't heard back yet.
Going up 5 jet sizes is needed to compensate for the change in fuel.gramps wrote: ↑Thu Jul 30, 2020 9:42 am This fuel is highly oxygenated compared to most other fuels. 650 Holley set up for Sunoco Standard. Now required to run the Green E15, water temps up to 240 with this fuel. Due to the high oxygen content percentage I feel we are running lean. Any idea of the oxygen percentage number or jetting change amount? Have a call and email into Sunoco but haven't heard back yet.
If we were to add an oxygenate, such as ethanol, then it would be necessary to increase jet size.Warp Speed wrote: ↑Thu Jul 30, 2020 2:43 pmGoing up 5 jet sizes is needed to compensate for the change in fuel.gramps wrote: ↑Thu Jul 30, 2020 9:42 am This fuel is highly oxygenated compared to most other fuels. 650 Holley set up for Sunoco Standard. Now required to run the Green E15, water temps up to 240 with this fuel. Due to the high oxygen content percentage I feel we are running lean. Any idea of the oxygen percentage number or jetting change amount? Have a call and email into Sunoco but haven't heard back yet.
Green E15 is 15% Ethenol. It is the same fuel currently used in Nascar Cup series. We have made this same switch that the OP is referring to, and a plus 5-7 jet sizes is what is needed to compensate.David Redszus wrote: ↑Thu Jul 30, 2020 4:33 pmIf we were to add an oxygenate, such as ethanol, then it would be necessary to increase jet size.Warp Speed wrote: ↑Thu Jul 30, 2020 2:43 pmGoing up 5 jet sizes is needed to compensate for the change in fuel.gramps wrote: ↑Thu Jul 30, 2020 9:42 am This fuel is highly oxygenated compared to most other fuels. 650 Holley set up for Sunoco Standard. Now required to run the Green E15, water temps up to 240 with this fuel. Due to the high oxygen content percentage I feel we are running lean. Any idea of the oxygen percentage number or jetting change amount? Have a call and email into Sunoco but haven't heard back yet.
But, many oxygenated fuels have a stoich value close to that of non-oxygenated fuels and therefore would not require larger jetting. Check the stoich value of the fuel you are using.