Fuel Tang Gauge????????

[george graves]

Anyone know whats the easiest way to run an aftermarket Fuel LEVEL Gauge?

With a aftermarket fuel level gauge sender of course!

[e30pq]

We used the stock fuel level sender with a G2X / IQ3 (data acquisition and display dash).

My friend Rob made it work but he was able to take the signal from the stock fuel level sender to get a fuel reading thru the data acquisition and digital dash.

[NigelStu]

Jim or e30pq -

Do either of you have the curve/equation used to match the OE sensor to the D.A. system? Or at least a few sensor readings (Ohm or voltage) vs. fuel level amount.

I'll be running my DL1/Dash2 setup in my chump car, and would like a good starting point.


Thanks

[nando]

while we're on this subject - ever since I replaced my fuel pump, my fuel gauge reads about 4 gallons low. It seems to vary a bit leading me to believe it's an electrical problem, but if I wanted to test the sensors (there are two) are they both 60-0ohms or is each one different?

[NigelStu]

Secondary question - are you guys pulling the fuel gauge signal from the meter wiring harness? Or direct wire from the fuel sender?

[rThor432]

Secondary question - are you guys pulling the fuel gauge signal from the meter wiring harness? Or direct wire from the fuel sender?

The signal to the gauge should be from one terminal on the sender.

I'm doing a hot-rod aftermarket fuel gauge/sender setup with a fuel cell in a car right now. This thread is a bit confusing, but I think it is relevant. I'm using a 0-90ohm range gauge/sender set. The sender is of the 'cut to length' style, so it is [relatively] universal. You could easily mount it to the existing tank and calibrate it to match your fuel capacity at full and empty. I'll take some pictures tomorrow for a visual reference.

[sludge1300]

Jim or e30pq -

Do either of you have the curve/equation used to match the OE sensor to the D.A. system? Or at least a few sensor readings (Ohm or voltage) vs. fuel level amount.

I'll be running my DL1/Dash2 setup in my chump car, and would like a good starting point.


Thanks

I'll second this question. I've got a Dash 2 without the DL1, and would really like to know my fuel level

[sludge1300]

Sorry, getting a little OT, but I'll rephrase my question above. Does anyone know the voltages the fuel senders put out at full and empty?...For the late model, single pump system.

[jlevie]

The sensors are variable resistors. I don't have my race car "diary" here with me where i have notes from the build, but memory says that the resistance is 0 for full and 120 ohms empty. To interface the sensors to a smart dash you'll need a source of regulated power, say 5v, and a current limiting resistor of 120-180 ohms. The dash signal is taken from the junction of the limiting resistor and the line to the sensors. The best way to calibrate the dash would be to completely drain tank (both sides) and get the empty voltage. The full tank voltage will be zero.

There is a fuel drain plug on the right side, but not on the left. To get the fuel out of the left side, run the pump while draining so the internal siphon will operate and lift fuel to the right side. Once drained, pull the left side sensor and see if there is still fuel in that side of the tank. If there is a good bit of fuel there, use a siphon or hand pump to suck it out.

[kishg]

It goes quite well with Vodka...

full of saccharine though.. im surprised if it's still sold in the US.

anyways, back OT, Luis, give dan gorman at gorman motorsports a holler. they are developing an adapter that allows you to run stock senders to an aftermarket gauge.

[rblevins]

this was my original thought hahah!!