Quote:
Originally Posted by wagonman76
Another problem with the ball type is it needs to be held steady and vertical. Won't happen in a car. I agree with the positive displacement type.
I am not familiar much with diesels. But with most cars, you could install a separate pressure regulator and abandon the original. Then you could install the flowmeter between the regulator and engine, hence requiring only one flowmeter and halving your margin of error.
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Actually my dad has a couple of those old zemco's(I think that was the brand) they could be installed in any position due to the fact that the ball was the same mass as the fuel so it really didnt matter. That ball was going pretty fast in that thing as well so even if it was a bit heavier or lighter it should still work. Wondering if a cork ball would be too light.
Those are a simple design but I dont like the design because of the fact that it adds to much restriction to fuel flow.
A lightweight paddle shape sitting in a horseshoe fuel flow shape would work alot better id think. you just have to have a flat disc with notches cut in it sitting on top of it to get your light impulse.
Diesels use the return flow to the tank to warm the rest of the fuel in the winter and they use fuel from the tank to cool the injector pump somewhat. Theroetically you could bypass the return to the tank and return it before the flowmeter but you better take some temperature readings to make sure the temp doesn't go up too much. Either that or put the return line fuel through a radiator cooler first. Of course that wont help winter time driving so if you live in the northern plain states you might want to put some kind of auxiliary heater in your fuel tank or at least before your filters.