Elan S3 fuel tank

[Dieschelan]

Hi

I will buy a new aluminium tank for my S3. The question is if I need other type of fuel sender. I know than the early tank is smaller than the later.
And the fuel guage is also diferent...

Cheers

Diego

[alan.barker]

Have a look in the for sale here. Someone is selling a tank
Alan

[nmauduit]

if you want to keep your gauge, you may want to double check what impedance range it is expecting (0-90 Ohms or 30-230 Ohms), see for instance
https://lotuselan.net/forums/viewtopic.php?f=38&t=35098&start=

[elated]

Certainly s3 fuel tanks were larger than those fitted to s4 etc(due the latter's need to accommodate the spare with the then standard bigger tyres.
Self-evidently the fuel level sender and the gauge must match: the systems fitted to s3 and s4 differ fundamentally and may not be mixed.
Gordon

[Craven]

Fuel gauge does not measure quantity in units, just indicates the level of fuel in the tank.
If a S4 & S3 tanks are the same height there would be no need for a different tank unit

[elated]

The gauges are based upon moving coil meters. On s3 the resistance is low when empty. On the s4 the resistance is high when empty.
Gordon

[Craven]

I think I covered the difference of types fairly well in the previously indicated link.
viewtopic. ... amp;start=