Quote:
Originally Posted by seagull
The wiring loom should have a earth strap with an eyelet on it ?
Or do you mean the earth from the pump to the body ?
You would need a 3 to 4 mm black cable say 300mm long and two suitable eyelets on each end.
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3mm auto cable is gonna be too thin. 3mm auto is only good for 10a continuous. Even 4mm auto is less than ideal. Its typically rated at 15a continuous. Larger fuel pumps usually pull about 15a and upwards. The walbro 450lph e85 pump for example (which i presume is inside this tank) pulls over 15a at 3bar at 13.5v. And it goes up from there as rail pressure increases. I'd recommend atleast a 6mm auto or 12awg /12bs size.
Although im thinking with the PW surge tank, the negative side of the pump is connected to the tank internally and could therefor earth via the mounting hardware if the bolt holes and such have a clean connection. Id suggest PW only use the additional earth cable as the crossmember / chassis mounting surfaces are painted and may not provide a clean earth. So an additional earth link is used to ensure good connection.
On my fuel pump wiring i use 8bs for all the power/earth cables.