When to go to an Electric Water Pump?
I'm elbows deep into my REV400 w/ front Hex install and AC removal.
I find myself wondering what else I should be doing while the front end is torn down. Regarding cooling I see some cars, turbophil for example, have switched to an electric water pump instead of the OEM mechanical impeller. I found old posts of people using a Davies Craig EWP115
, which from my perspective is a cheap mod and now is a great time to do it. However, I can't decide if this is a good move or not.
It appears there are 3 common ways to setup an electric pump.
1. Always on, engine thermostat removed
2. Always on, Engine thermostat installed with a 5mm hole drilled in it
3. electronic controller w/ variable speed control based upon temp, engine thermostat installed, also controls fans. This also allows running the EWP and fans for 2 min after engine shutdown to reduce heat soak.
What is the reasoning most use to determine moving to an EWP?
If I did #3, would I be able to remove the AC switch relay pack up front (and remove the wiring)?
Any issues running the fans and EWP for 2 min with a light weight battery (Odyssey PC625 or Shorai LFX36L3-BS12)?
My use of the Exige is mainly Track days, debating on doing TTs this year, AutoX, and occasionally tooling around town w/ cars and coffee.
2006 Lotus Exige: Avery Matte Graphite wrap, partial built motor (9:1 Mahle pistons, Ferrea Competition valves, ACT Clutch, ARP head studs), REV400, Nitron SAs, BOE QS exhaust, Ultradisc rotors, Moroso Oil pan, Circuitworks oil pump, CF Stuff (Cup Roof, ReVerie diffusor, side scoops, APR air dam, craftsquare mirrors), Worksbell quick release, Odyssey PC625, Morimoto Xenon HID, BOE Rear Oil Cooler, Difflow Aeroplates, BOE Swirl Pot, DaviesCraig EWP, Reversed Heater Matrix