Measuring fuel flow

SD diesels were widely available in the US in the 1981-86 Datsun/Nissan 720 pickups, and in Canada through '87 in the D21 pickup.

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Dale
Posts: 19
Joined: 8 years ago

Measuring fuel flow

#1

Post by Dale »

I stumbled across this flow meter for $13 on futurlec: http://www.futurlec.com/FLOWFUEL30L0.shtml

I'm trying to work out if I need 1 or 2 of them and where to put them. How much fuel does the lift pump move, and roughly how much gets recirculated under various circumstances?
Nissan_Ranger
Posts: 267
Joined: 14 years ago
Location: Canada

#2

Post by Nissan_Ranger »

Why do you want them at all? Just curious...
The old 'six gun' was as popular as the cell phone in its time and just as annoying when it went off in the Theater.
Dale
Posts: 19
Joined: 8 years ago

#3

Post by Dale »

To watch fuel consumption in real time.
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5and2dimes1
Posts: 14
Joined: 9 years ago
Location: Lethbridge Alberta Canada

#4

Post by 5and2dimes1 »

I sure hope your not using 2.0- 30.0 l per minute... :roll:
Dale
Posts: 19
Joined: 8 years ago

#5

Post by Dale »

That's per hour. Typo on the part of the website, if you read the datasheet it's per hour, and the tiny hose barbs suggest it as well I think.
Cmdr.Ron
Posts: 15
Joined: 10 years ago
Location: Middleburg, Fla., U.S. of A.

#6

Post by Cmdr.Ron »

Wowser, Howser, what a spread!
(2 to 30 Liters / Hr)
To convert that to American, I had to break-out a calculator.
(Jethro weren't here to cipher it for me.)
2L/Hr = 1.1267oz./min. (that's slightly over 2 Tablespoons) - boozers know a shot is only 1.5oz.
Divided by 4 cyl. means only .28oz./min each
, but . . .
30L/Hr = 16.9oz/min. (that's 1Pint + almost 2 Tablespoons)
Y'all realize that's flowing 4.22oz/min (over 1/2 cup) to only 1 cyl?
Little wonder black smoke rolls when the smoke screw is twisted.
If that tiny air inlet was bigger, could we turn-up the fuel flow to make some normally aspirated torque?
Or would acceleration suffer because of using the vast reservoirs power that are normally only used to get things moving?
Inquiring minds want to know this stuff.

Shalom!
Cmdr. Ron
What do all-y'all think?
Nissan_Ranger
Posts: 267
Joined: 14 years ago
Location: Canada

#7

Post by Nissan_Ranger »

No. Number two cause of damage to rings after air filter breaches is black (smoke) carbon from over injection/insufficient combustion air. A little more torque is realized from cranking up injection quantities past the smoke point, but the bad side effects are increased fuel consumption and ring damage.
The old 'six gun' was as popular as the cell phone in its time and just as annoying when it went off in the Theater.
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