Useable fuel capacity

[Storer]

Had to recalibrate my SPA dash fuel level this weekend.

My new sender needed almost 15 litres in the tanks before it started to change the resistance.

From that point to brimmed full it was 66 litres. The good thing is I know that my in-tank pump can suck most of that 15 litres as there is only 1/4" of fuel left that it can't suck out of the L/H tank. There was more left in the R/H tank as the outlet is not right in the bottom.

I know the Factory say the tanks hold 88 litres but it is not all available!! You have been warned.


Paul

[845ste]

I am 27L for each with the sponges race inside

[F.C.]

Storer said:

Had to recalibrate my SPA dash fuel level this weekend.

My new sender needed almost 15 litres in the tanks before it started to change the resistance.

From that point to brimmed full it was 66 litres. The good thing is I know that my in-tank pump can suck most of that 15 litres as there is only 1/4" of fuel left that it can't suck out of the L/H tank. There was more left in the R/H tank as the outlet is not right in the bottom.

I know the Factory say the tanks hold 88 litres but it is not all available!! You have been warned.


Paul

Paul out of curiosity did you take the resistance readings as you filled, and what were they?

[humble]

Storer said:

Had to recalibrate my SPA dash fuel level this weekend.

My new sender needed almost 15 litres in the tanks before it started to change the resistance.

From that point to brimmed full it was 66 litres. The good thing is I know that my in-tank pump can suck most of that 15 litres as there is only 1/4" of fuel left that it can't suck out of the L/H tank. There was more left in the R/H tank as the outlet is not right in the bottom.

I know the Factory say the tanks hold 88 litres but it is not all available!! You have been warned.

Paul

This is what I found on my setup as well, the last 3 or so gallons isn't enough to register on the fuel sender, but keep in mind that's only 1.5 gallons per tank.
Using the Holley hydramat fuel pickups, I found that I could suck the tanks completely dry, and I've done so on multiple occasions. Now I've set my warning light to come on as soon as the fuel sender sees empty!

Will

[Storer]

F.C. said:

Paul out of curiosity did you take the resistance readings as you filled, and what were they?

I did. They are as follows

Empty (well as empty as the in tank pump will suck it) 69.8 ohms
+20 litres = 61.5 ohms
+30 litres = 50.3 ohms
+40 litres = 41.5 ohms
+50 litres = 31.3 ohms
+60 litres = 17.6 ohms
+66 litres = Brimmed full = 8.1 ohms

You can't put that many readings into the SPA dash so I ignored the brimmed one.

Paul

[xrtim]

humble said:

This is what I found on my setup as well, the last 3 or so gallons isn't enough to register on the fuel sender, but keep in mind that's only 1.5 gallons per tank.
Using the Holley hydramat fuel pickups, I found that I could suck the tanks completely dry, and I've done so on multiple occasions. Now I've set my warning light to come on as soon as the fuel sender sees empty!

Will

Hi Will
i'm still in the position where i can access the tanks and have been thinking of fitting the Hydramat to the tanks. Did you fit them to the Factory aluminium tanks or have you used custom tanks with an easier access to fit the Hydramat. The only way I can see to fit them to the aluminium tanks is to cut the tank open, remove what baffles are in there and connect the tank outlet to the Hydramat and weld back up again

Regards Tim

[humble]

xrtim said:

Hi Will
i'm still in the position where i can access the tanks and have been thinking of fitting the Hydramat to the tanks. Did you fit them to the Factory aluminium tanks or have you used custom tanks with an easier access to fit the Hydramat. The only way I can see to fit them to the aluminium tanks is to cut the tank open, remove what baffles are in there and connect the tank outlet to the Hydramat and weld back up again

Regards Tim

I replaced my tanks with Fuel Safe fuel cells, and had them install the hydramat pickups when I ordered the tanks. I wholly recommend fuel cells over the factory tanks because of their exposed location, so if you can swing the expense it's worth it.

Will

[F.C.]

Storer said:

I did. They are as follows

Empty (well as empty as the in tank pump will suck it) 69.8 ohms
+20 litres = 61.5 ohms
+30 litres = 50.3 ohms
+40 litres = 41.5 ohms
+50 litres = 31.3 ohms
+60 litres = 17.6 ohms
+66 litres = Brimmed full = 8.1 ohms

You can't put that many readings into the SPA dash so I ignored the brimmed one.

Paul

Thanks for this.