Which Electric Water Pump (EWP®) Size Should I Choose?

01/08/2019 12:00AM

As a world leader in their field, Davies Craig understands that sometimes a return to basics is what’s needed. And so, it’s with our new seven-step series of articles on the installation of our Electric Water Pumps (EWP®), their associated equipment.

Our Electric Water Pumps are designed to either supplement or replace the standard mechanical water pumps fitted and built into the car engine. But which one to select? We have four pumps to choose from and the clue as to their capacity and how much they flow per minute is in the name.

EWP®80, EWP®115, EWP®130, and EWP®150 are the names and the numbers are the flow rates, in litres per minute.

The next step is to match up the flow rates with engine size.  For a standard 2.0L engine, the EWP®80 would be fine. As a rule, the EWP®115 will suit engines from 2.0L to 3.5L in capacity. For 3.5L to 5.0L our EWP®130 will keep the engine cool and calm, and for anything larger, our EWP®150 will stand up to be counted.

However, these are for what could be considered unmodified and street driven cars. Go off-road? Have a car that’s a track day weapon? Perhaps it’s a car that’s packing a modified straight six and a block that’s no longer a spring chicken.

Here we would recommend that bigger is better. The EWP115® would be a starting point however, in a play it safe consideration, the EWP®130 and EWP®150 should be in the list.

Our next article will focus on the pump and how to match it with associated equipment such as a digital controller and/or other parts.