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Old 07-31-2014, 09:13 PM   #47 (permalink)
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Join Date: Oct 2008
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Mercedes 89 D - '89 Mercedes 300 E
90 day: 33.86 mpg (US)

Skodie - '09 Skoda Octavia TDI PD
90 day: 38.84 mpg (US)

1993 Mercedes 300D Turbo - '93 Mercedes Benz 300D Turbo W124
90 day: 26.19 mpg (US)

Crossie - '16 Subaru XV Crosstreak
90 day: 9.61 mpg (US)

Crossie - '16 Subaru XV Crosstreak
90 day: 33.34 mpg (US)
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Diesel Flow metering cheap

Originally Posted by oldbeaver View Post
Hello old diesel fellows,

There is guy in India who sells a complete system consisting of two diesel fuel flow meters (one for supply and one for return fuel) and a LCD digital display that shows a several consumption values, including the difference between the two if I am not wrong. Fuel consumption in liters/hour.

Fuel Consumption Meter - Diesel Generator Fuel Consumption Meter, Automobile Fuel Consumption Meter, Vehicle Fuel Consumption Meter and Fuel Consumption Calculator Manufacturer & Exporter from Mehsana, India

To calculate accurate fuel efficiency (mpg or km/liter), the only thing missing is to take the speed signal existing in our cars (or generate it if not), which is in miles/hour or km/hour, and divide by consumption.

The system looks robust. It should allow to get fuel efficiency in km/liter (or miles per gallon) with very little programming. Maybe it can be done using the elabtronics kits:

AutoSpeed - eLabtronics EZ System, Part 1

The result should be shown in the very same display of the indian system.

Someone will take this project? It looks very attractive and possible.


Last minute: I got the price: USD 650. Too expensive I think.

I found a much cheaper set for diesel flow metering in a IDI diesel:

Flow Sensor

Look for "gasflowmeter", just arrived, they say.

It has a digital display and one flow meter. We need to buy the second flow meter, and a processor to calculate difference between supply and return fuel, and combine with speed signal. Not easy for my digital electronics knowledge.

I cannot guarantee duration of this flow meters, but if the system works, one can replace them later if they fail.

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Mercedes 300 D turbo 1993
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