E85 on track MPG
#1
E85 on track MPG
I'm on FM kit everything with E85 and 250hp roughly. I've done a Harris Hill Raceway (Austin,TX) track day and averaged about 6mpg; but it's a small track. I have 40 minutes of driving at Circuit of the America's this saturday and wondering what kind of fuel consumption I should get incase I need to bring spare fuel. Max I'll have 48 miles if I'm lucky. If I get worse gas mileage of 4mpg then I should consume 9.6 Gallons out of my 11.9g stock gas tank. So maybe bring 1x 5 gallon jug of E85 and I should be more than prepared I'm thinking. Anyone have any data to share on E85 consumption on big tracks?
#3
Exactly, fuel consumption in the track context is easier to calculate as gallons/hr like marine and aircraft.
Burn rate varies greatly depending on how much time is spent at full throttle, average RPM and the power output of the car so asking for other people's burn rate won't really help you. The only way to get usefully accurate data is to do at least a little bit of testing. If you don't trust a fuel gauge (you shouldn't) the most accurate way is to actually weigh the car. That's what we would do on our race cars once the engine tune was finalized. From there we had very accurate data on gallons per hour which would then be used for Ray strategy, particularly in Enduros.
Here is a handy formula to plug in your numbers once you've done some initial testing. How to Estimate Your Engine's Required Fuel Flow.
Burn rate varies greatly depending on how much time is spent at full throttle, average RPM and the power output of the car so asking for other people's burn rate won't really help you. The only way to get usefully accurate data is to do at least a little bit of testing. If you don't trust a fuel gauge (you shouldn't) the most accurate way is to actually weigh the car. That's what we would do on our race cars once the engine tune was finalized. From there we had very accurate data on gallons per hour which would then be used for Ray strategy, particularly in Enduros.
Here is a handy formula to plug in your numbers once you've done some initial testing. How to Estimate Your Engine's Required Fuel Flow.
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