Davies Craig EWP install

[PIR4TE]

I am looking to reduce heatsoak, gain some thermal efficiency and reduce parasitic loss from the front dress in my 2011 L77 by swapping the mechanical water pump with a Meziere WP329n electric unit.
I welcome feedback from anyone who has fitted a Meziere, particularly one managed by a digital PWM controller such as the Davies Craig unit.
I have an SLP 160°F thermostat and intend setting the operating temp via controller to 80°C (176°F), and will occasionally set it to 75°C (167°F).
Would the ECU (BCM?) have a spit if I were to simply disconnect the appropriate one of the two thermatic fans from the harness and have that managed by the Davies Craig controller?
Also I run almost exclusively on e85 with original plugs at the moment, any advice regarding revised heat spec / plug gap would also be appreciated.
Documentation

 

[Cava454]

Daily or weekender?

 

[PIR4TE]

Daily, like 100k every day.

 

[one_and_only2004]

Ecu will have a fit with the fan Disconnected - easily fixed by a tuner as I've done it myself on my car.

 

[PIR4TE]

Yeah will leave it up to him then, thanks.

 

[wraith]

The parasitic loss of a belt driven water pump isn't really that high. If I was you I would leave it alone. Last thing you want is electrics to die for your water pump and dealing with the ensuing mess.

 

[PIR4TE]

Good point about loss from mechanical pump being marginal, at the wheels is only about 6kw gain up top, but adds 12Nm across the board - about 2%.

 

[wraith]

Until the pump has electrical problems and your none the wiser when it fails.

 

[one_and_only2004]

In the end its up to you but is 6kw worth compromising the reliability of your motor?
Just buy a 25% underdrive harmonic Balancer and save your killerwasps that way.

 

[PIR4TE]

The reason for doing it is mainly business calls around the tropics during summer, when heat-soak zaps performance and economy - and vice versa - such that every 5° drop in IAT increases engine output by 1%.
My goal here is to reduce and normalize IAT by lowering Engine Coolant Temperature from 197° to 176° using independent PWM control of both pump and fan.
If 176°-180° can be maintained then I regain 4% otherwise lost during heat soaked urban driving.
The 5-6% overall improvement in performance and economy, will be welcome on hot stop start urban days.