Guys, stay with me on this question- some explanation is needed for it to make sense and I welcome qualified critique & opinion!
The metal casting quality of the VZ/VE waterpump is pretty ordinary (not smoothed out inside etc- lots of casting 'lips' and not super efficient.)
An engineer explained to me that poor impala design creates increased cavitation in water pumps resulting in the creation of tiny bubbles (like a boats propeller) which have decreased heat exchange efficiency against the surface area of the engine block = less efficient cooling.
He explained that by using computer modelling to engineer the best shaped impalas and smoothing out the pump body internally, a much greater cooling efficiency could be obtained resulting in a cooler running engine with less reliance on the old mechanical thermostat to open up and flood more water through the block- he stated that these pumps are used in Group A racing (can anyone confirm?)
He argued that the fitting of a retro engineered pump resulting in a cooler running engine will increase fuel efficiency but possibly disrupt the outcomes being monitored by the oxygen sensors in the exhaust system as gases would be burning at different temperatures at different engine loads than pre-programmed) so a custom tune is recommended to reset the perimeters for operational efficiency which the ECU would be trying to maintain on it's old manufacturers specifications otherwise..
Now, before I dismiss this as 'Snake Oil' selling in motor form, does anyone here care to challenge his assertion that such a pump would result in increased fuel efficiency (they claim 2l per 100!) and more power....
I'm skeptical... my VE 6.0L with A6 Trans is returning average 13LPH suburban/city driving which I'm relatively happy with (catback/CAI)
Other opinions very welcome- cheers
The metal casting quality of the VZ/VE waterpump is pretty ordinary (not smoothed out inside etc- lots of casting 'lips' and not super efficient.)
An engineer explained to me that poor impala design creates increased cavitation in water pumps resulting in the creation of tiny bubbles (like a boats propeller) which have decreased heat exchange efficiency against the surface area of the engine block = less efficient cooling.
He explained that by using computer modelling to engineer the best shaped impalas and smoothing out the pump body internally, a much greater cooling efficiency could be obtained resulting in a cooler running engine with less reliance on the old mechanical thermostat to open up and flood more water through the block- he stated that these pumps are used in Group A racing (can anyone confirm?)
He argued that the fitting of a retro engineered pump resulting in a cooler running engine will increase fuel efficiency but possibly disrupt the outcomes being monitored by the oxygen sensors in the exhaust system as gases would be burning at different temperatures at different engine loads than pre-programmed) so a custom tune is recommended to reset the perimeters for operational efficiency which the ECU would be trying to maintain on it's old manufacturers specifications otherwise..
Now, before I dismiss this as 'Snake Oil' selling in motor form, does anyone here care to challenge his assertion that such a pump would result in increased fuel efficiency (they claim 2l per 100!) and more power....
I'm skeptical... my VE 6.0L with A6 Trans is returning average 13LPH suburban/city driving which I'm relatively happy with (catback/CAI)
Other opinions very welcome- cheers