Lotus Elan

Race Twin Cam mileage

PostPost by: wbmoore » Sat Oct 28, 2017 5:28 pm

What kind of mileage does a full-race Twin Cam get ? I'm trying to figure out a fuel cell size. Thanks.
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PostPost by: rgh0 » Sun Oct 29, 2017 11:23 am

it depends on the track but about 2 km per litre is what mine gets on the track. I use a 30 litre fuel cell which is plenty for the maximum length of races here.

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PostPost by: 2cams70 » Sun Oct 29, 2017 11:29 pm

I don't have any experience of race engine fuel consumption but that seems like a heck of a lot of fuel. A typical modern 600-700HP B double truck hauling 70 tonnes of freight returns a similar fuel consumption!
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PostPost by: nmauduit » Mon Oct 30, 2017 8:14 am

2cams70 wrote:I don't have any experience of race engine fuel consumption but that seems like a heck of a lot of fuel. A typical modern 600-700HP B double truck hauling 70 tonnes of freight returns a similar fuel consumption!


Not in terms of mileage but time, my friend's 3.8l E-type (not full out prepared, say rally level) needs between 40 and 50l per racing hour, an other friend told me his Cheetah can use 60 to 80 l/h depending on enthusiasm...

all that without trailer.
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PostPost by: patrics » Mon Oct 30, 2017 9:12 pm

Hi,
a 30 litre tank will hold enough to last a 40 minute race - I don't have experience for the 60 minute Classic K but my guess is you would need a bigger tank.

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Steve
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PostPost by: toomspj » Mon Oct 30, 2017 11:15 pm

40 l does me for a 1hr race which is normally under 80 miles ( there's pit stop to take into acccount). So, Rohan's rule of thumb would allow some margin. But if it's a particularly hard fought race the fuel warming light will be coming on by the end.
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PostPost by: wbmoore » Sun Nov 05, 2017 3:35 pm

Thanks guys. That was a fun exercise. Kms/liter to miles/gallon to gallons/lap to laps/session to gallons/session to gallons/cell. Now I have to figure the shape and weight of the cell.

In the video below the driver mentions a 100 liter cell. Check it out.

http://www.motorsportmagazine.com/opini ... s-elan-26r

Thanks for the input. Brad Moore.
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PostPost by: prezoom » Sun Nov 05, 2017 5:16 pm

Different race tracks had different amounts of fuel required. The amount of time spent at WOT usually made the difference. The old Riverside Raceway track was a real fuel guzzler, especially when using the long course. The amount of time spent at WOT, and at maximum rpm, was huge from turns 8 to 9, and 9 to 6. More slow turns, on and off the throttle, used increased mileage fuel wise. Never tried to compute mileage per gallon. Used pounds of fuel consumed.
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