V8 cooling ideas., Only because I have the parts! Options

[BRAVE_HELIOS]

I think I have pretty much exhausted the ways to make a mechanical Chrysler/Renegade water pump setup run as efficiently as possible.

At this time; I do notice that at idle, the engine temp creeps up but as soon as I give it throttle; the temp comes down by almost 10 degrees... it stands the reason since at higher rpm's, there is more water flow.

Now for the ideas... I have a spare aux electric water pump from my 545i. BMW uses the pump to assist in pumping coolant to the heater core. It is a small unit and I am sure the flow is low compared to the standard electric or mechanical water pump. Could I integrate this lil ol electric unit to flow a more consistent rate, even at idle? Would it interrupt the flow from the mechanical w/p?

The other item is the oil cooler that came with the engine but I have yet to install. Would this help cool the engine down and by how much?

[DM_2000]

What specifically are you using for an engine and cooling system?

For the aux pump to work would require a check valve in one of the rad hoses then place the pump across this check valve. If a check valve isn't used, the pump would just recirculate water.

Another possibility would be to plumb the pump in like a heater core application then hang a heater core under the rear of the car.

An oil to air cooler will reduce engine temps overall as oil is always hotter than coolant. An oil to coolant cooler reduces oil temp at the expense of increasing coolant temps if the radiator is marginal.

What is your charging system voltage? If low, bringing the engine RPM up would increase voltage and make the electric fan spin faster.

Some cars ( 2000 era Jeep / Toyota ? ) used a hydraulic rad fan driven off the power steering pump. I'd be tempted to use something like this as I'd think power losses would be less.

[BRAVE_HELIOS]

What specifically are you using for an engine and cooling system?

For the aux pump to work would require a check valve in one of the rad hoses then place the pump across this check valve. If a check valve isn't used, the pump would just recirculate water.

Another possibility would be to plumb the pump in like a heater core application then hang a heater core under the rear of the car.

An oil to air cooler will reduce engine temps overall as oil is always hotter than coolant. An oil to coolant cooler reduces oil temp at the expense of increasing coolant temps if the radiator is marginal.

What is your charging system voltage? If low, bringing the engine RPM up would increase voltage and make the electric fan spin faster.

Some cars ( 2000 era Jeep / Toyota ? ) used a hydraulic rad fan driven off the power steering pump. I'd be tempted to use something like this as I'd think power losses would be less.

Perhaps you can sketch out the check valve setup? I cannot quite picture it.

I do not think I would go the heater core route.

The oil cooler I have is an oil to air cooler. That might be the next step to try.

RPM does drop when the electric fan (from an early 90's Taurus) comes on. I can probably bump up the idle a bit to compensate. Voltage drops from around 14 to around < 13.