Fuel Tank Question.

For about 23 years I managed with a very basic system.
When I bought the Series III, it had a 45 litre tank on each side. There was a simple tap to switch from one tank to the other.
On occasions when I needed to take advantage of the two tanks, I used the passenger side tank first and when it was empty, I switched to the driver's side tank.
Only the original driver's side tank had a gauge.
I knew how far I had driven since filling the tanks, so I had a pretty good idea when the first one was about the run out.
If I was in a situation where it would be embarrassing to have the engine die, I would briefly switch over to the main tank.
It may sound primitive, but it worked and I never wished that I had a more sophisticated system.

On my fathers S3 we had a tap between the two tanks before the fuel pump , used to run on the L/H tank untill the engine wouls serge then quickly turn the tap to use the R/H tank . The tap was mounted in the front of the seat box near the hand brake .

For me much the same as vnx205, my S3 88 has a second tank which is slightly larger than the primary tank. The secondary has no gauge the primary does. Between the seats is a simple fuel switch. A hangover from military days I reset the trip meter on filling up and I know that I get so many miles out of the secondary tank, once those miles click over I swap tanks and now have a gauged supply. I also know how many miles this roughly gives me in case it lets me down (whoever heard of Lucas letting you down[bigsmile]) Old school but effective, as long as the trip meter works I guess. I find that I only have a few litres of fuel left in the second tank each time. Even if it did let you down you switch tanks when she splutters and if you stick to the system you are on a gauge. Toyed with the idea of a second sender but eventually didn't see the point.

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Originally Posted by inch

For me much the same as vnx205, my S3 88 has a second tank which is slightly larger than the primary tank. The secondary has no gauge the primary does. Between the seats is a simple fuel switch. A hangover from military days I reset the trip meter on filling up and I know that I get so many miles out of the secondary tank, once those miles click over I swap tanks and now have a gauged supply. I also know how many miles this roughly gives me in case it lets me down (whoever heard of Lucas letting you down[bigsmile]) Old school but effective, as long as the trip meter works I guess. I find that I only have a few litres of fuel left in the second tank each time. Even if it did let you down you switch tanks when she splutters and if you stick to the system you are on a gauge. Toyed with the idea of a second sender but eventually didn't see the point.

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same here I am toying with a second sender... hence the question if there is an easy way to install a second sender. The tank has no hole for it so I have to cut one... not to keen on that idea, simply because I cannot cut straight and cirlces are close to impossible for me. :-).

H

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Originally Posted by itfarmer

same here I am toying with a second sender... hence the question if there is an easy way to install a second sender. The tank has no hole for it so I have to cut one... not to keen on that idea, simply because I cannot cut straight and cirlces are close to impossible for me. :-).

H

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use a hole saw, simple

https://www.ebay.com.au/i/1838604122...xoCNAQQAvD_BwE

Used this type.

whitehillbilly

You will need make sure you get all the metal shavings out of the tank , you don't want them getting up to the fuel pump & putting a hole in the diaphragm.

Don't all Series 3 have a strainer on the fuel pickup in the tank? And another one on the suction side of the pump?

Do you folks have any examples of sender unit that will work?

Get the same or a repro sender as is fitted to your main tank. Available from usual parts suppliers in the UK.