What kind of FE instrumentation for Pre-OBD2 Diesel

[Varn]

Hill billy,
Please report back!

Originally Posted by Hilly-Billy-13

I haven't played with the Futurelec units yet, how ever I think the figures for the Bio-Tech units are correct. I've ordered a Futurelec unit to see how well it works on both sides of my Diesel Rabbit
Bill

[Hilly-Billy-13]

Originally Posted by Varn

Hill billy,
Please report back!

I ordered 2, I figured it's be easier to compare apples to apples, as opposed to apples to avocados. Meaning I can see both sides of the fuel usage at the same time
Bill

As of today 11/24/2012 I still haven't received them

[HypermilerAX]

Be sure the flowmeter can handle high enough flows.

I have a small 1.5 diesel engine with 58 hp and when I drive at 50 mph I have roughly 30 lph on the supply line and 25 lph on the return.

[skyking]

I think I'll pull my return line and set it in a bucket, to see just what I will be dealing with.

[Hilly-Billy-13]

Originally Posted by HypermilerAX

Be sure the flowmeter can handle high enough flows.

I have a small 1.5 diesel engine with 58 hp and when I drive at 50 mph I have roughly 30 lph on the supply line and 25 lph on the return.

That gives me a good reference point, mine is also a 1.5L Diesel. You wouldn't happen to know what your flow rates are at idle would you?
Thanks
Bill

[HypermilerAX]

Sure. At idle, I have 18 lph on the supply line and 0.5 lph less on the return line.

It's a naturally aspirated engine from the 90's with a mechanical injection pump.

[Varn]

Edit
That is pretty amazing .5lph to idle

Who would have guessed that the flow rates are as high as they are.

Originally Posted by HypermilerAX

Sure. At idle, I have 18 lph on the supply line and 0.5 lph less on the return line.

It's a naturally aspirated engine from the 90's with a mechanical injection pump.

[bestclimb]

Originally Posted by Varn

Edit
That is pretty amazing .5lph to idle

Who would have guessed that the flow rates are as high as they are.

that's better than a Gasser. 1.6l in the civic would idle at .25 gph according to the MPGuino.

[rodeo1314]

I just purchased a few of the FLOWFUEL30L0 flow meters and I am having some trouble reading the output signal. How are you guys getting a reading? My application is not in a car, it's an inline fuel measurement system for a dyno. I'm in the testing phase right now, I just got the meters. I can't figure out how to read these pulses and make it a useful signal that I can read.

[Hilly-Billy-13]

Originally Posted by rodeo1314

I just purchased a few of the FLOWFUEL30L0 flow meters and I am having some trouble reading the output signal. How are you guys getting a reading? My application is not in a car, it's an inline fuel measurement system for a dyno. I'm in the testing phase right now, I just got the meters. I can't figure out how to read these pulses and make it a useful signal that I can read.

rodeo1314
The Futerlec & most low cost fuel flow sensors use a digital output "Hall Effect" sensor. They're defined as an open collector output, what this means is the 3 wires are hooked up as follows Red goes to the positive side supply, if your using a Arduino or similar, use 5 Volts, the Black goes to the minus side of your supply. The you need a resistor between the positive side of the supply and the white wire which is your output. I've seen values from 10 K on down, some arduino pins have a pullup resistor as an option. I haven't received my sensors yet so I can't say for certain what value of resistor is needed.
Bill

Oh yes back in the mid to late 70's & early 80's I did some work on Dyno instrumentation I wish I'd had access to the sensors we can get now.