zgeezer Posted February 12, 2012 Share Posted February 12, 2012 I think this might work with s30 fuel gauge: ohm range 0 -90 (with others available). Apparently, this was a new product at the last SEMA show. I can't find a price listed for it. G:rolleyes: Quote Link to comment Share on other sites More sharing options...
z240 Posted February 13, 2012 Share Posted February 13, 2012 This is a brilliant idea. Need to find out how that works. Ultrasonic transit time reflection? Do you order it to length?This type of gauge that reads the level is prone to make our gauges read a bit stangely. With our uneven tall on one side tank, the volume vs level relationship is not linear. A level based gauge will make our gauge go down more quickly in the top lump of our tanks, then it will slow down once the level gets into the main part of the tank. It should get the empty part right right no matter what. The flatter 77-78 tanks would be less pronounced.The picture shows its top "may" be thin enough to fit above the tank without a new hole in the hatch floor. Those of us doing the cool new in-tank fuel pumps that mount in the top are handling this anyway. Quote Link to comment Share on other sites More sharing options...
zgeezer Posted February 13, 2012 Author Share Posted February 13, 2012 This is a brilliant idea. Need to find out how that works. Ultrasonic transit time reflection? Do you order it to length?This type of gauge that reads the level is prone to make our gauges read a bit stangely. With our uneven tall on one side tank, the volume vs level relationship is not linear. A level based gauge will make our gauge go down more quickly in the top lump of our tanks, then it will slow down once the level gets into the main part of the tank. It should get the empty part right right no matter what. The flatter 77-78 tanks would be less pronounced.The picture shows its top "may" be thin enough to fit above the tank without a new hole in the hatch floor. Those of us doing the cool new in-tank fuel pumps that mount in the top are handling this anyway. The tube is plastic and it appears that it is cut to fit the depth of your particular tank. It measures the difference in the pressure change within the tube as the fuel level drops. I remember that Ford fuel gauges for decades were offset.... the 1/2 full needle point was located about 3/4 the distance of the gauge. In other words, the needle would move 3/4 the full range of the gauge to measure that last 1/2 tank of gas. Non linear. g Quote Link to comment Share on other sites More sharing options...
z240 Posted February 15, 2012 Share Posted February 15, 2012 (edited) Just got a quote from them. $140 incl shipping to me in Calgary. Bit less for the US based locations of course. Maybe a bit too much. They also confirm its pressure based, is not compensatable (is that a word? well it is now!) for height/volume uniqueness and further more CANNOT be tweaked with external resistor networks to attempt to match it resistivity range to your gauge. Edited February 15, 2012 by z240 Quote Link to comment Share on other sites More sharing options...
Josh280z Posted April 10, 2012 Share Posted April 10, 2012 How did this go, any good?? Quote Link to comment Share on other sites More sharing options...
dan5138 Posted April 10, 2012 Share Posted April 10, 2012 The fuel level works goofy in these cars anyway because of how they are shaped, stock everything, my first half would go pretty quick, and the bottom half seemed to last significantly longer. The simplest way to use a different style of sending unit would be compensate with the guage face. You would simply have to make another face for the guage. Fill the tank to capacity, and drain off a quarter of its volume at a time marking each quarter on your new guage face. Figure out how many degrees there are between each mark to use as reference when designing and printing the new guage face. Might look a little goofy, but hey it will be accurate. Quote Link to comment Share on other sites More sharing options...
Josh280z Posted April 10, 2012 Share Posted April 10, 2012 Good to know, I don't think I will go that route... Quote Link to comment Share on other sites More sharing options...
Fire604 Posted April 10, 2012 Share Posted April 10, 2012 You could always try this unit from Speedhut. Same type of unit but less than half the price. Quote Link to comment Share on other sites More sharing options...
Tony D Posted April 11, 2012 Share Posted April 11, 2012 (edited) Nissan solved the non linear response curve for our cars where it is critical the pump not run dry (EFI) with a simple LED and capacitance switch. Who cares where the level is REALLY until you are below 1/4 of a tank... And more importantly when you have 40 miles or less left on the tank? A capacitance switch and LED does the last on very reliably. I've run bad gauges for years and simply refuel when the light comes on! I got a feeling most people do. Set it to three gallons level, and you're more than safe...and on the stock assembly that's an easy tweak away! Edited April 11, 2012 by Tony D Quote Link to comment Share on other sites More sharing options...
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