True, that is why positive displacement is best. But still the ball ones were considered accurate enough in their day, though that was pre hypermilers I am not sure how they would stand up today. If I come up with one or make one, perhaps I shall send it to you for testing
accuracy is something I consider a must, followed by simplicity and robustness. And it should not cause a great drop in pressure. Preferably it can be made at home.
I have spent the last few days on the net looking for such an item and it does not exist. Sure there are tons of flowmeters ranging as high as $4,900 with fairly simple ones costing $1,200. Even Edlebrock carries one for some rediculous price that is over $1000.
The boating business has them as does the aviation business. Both are gold plated as far as our ends are concerned.
However as I see it if we can find this solution then we really will have a mileage computer for every car with an IC engine.
DCB, How many pulses per gallon would we really need? I mean as a minimum? So far my take on it has been the more the better but I would really like a minimum number that would allow instant mpg to work decently.
Consider here the 1 liter engines I guess.