The "cool can" is a good ideal.
The resistor would just splice in with the motor power wire. You just have to make sure you have a resistor able to withstand the 2.5 amp draw of the pump.

 

it would be both, you would essentially be finding the "sweet" spot between the two. As the article states, you can't overcompensate one and not the other.
"If the flow rate is too low, the coolant in the heat exchanger gets cool and the coolant in the intercooler stays too hot, which reduces overall efficiency. If the flow rate is too high, the coolant doesn't stay in the heat exchanger long enough to cool down, which also reduces the overall efficiency. We needed to find the happy medium."

The only thing that I am not so sure about is having the larger Hx would cause your flow rate to slow down. You would be increasing the "amount" of coolant that your pumping with the larger Hx and ineffect casuing it to cool quicker, but like I was wondering early, where is that line that the "amount" of coolant would travel slower. Make sense what i am asking?

FWW I agree that your larger Hx is a great idea, I actually think by getting a larger Hx you are in a technical sense doing the same thing as changing the flow rate, by adding more surface area. I just wonder if it really changes the flow rate at all. I bet it doesn't. By having a larger Hx, you actually wouldn't want it to anyway.

 

If you really didn't care about having any "utility"of your bed, you could just put a large tank back there, but with mine, I'd still like to keep "some"sort of space in the bed. Looks like most of the Ford guys just have a bigger tank that they pack ice into, but you couldn't run anything but water because it would get diluted too much. I think that if you could keep the IAT's around 80-100 during, or at the end of a run that would be just right. Maybe I'm dreaming, though.

 

The only way flow rate would change is if you changed to a different pump, or changed the flow rate of the existing pump. If you choose the latter route (changing the flow rate of the existing pump via some type of input voltage change), you must be sure the pump is rated for voltage across that range. Some DC pumps are rated at 5-20 volts, which would be fine, but others are rated at something tighter, like 11-16 volts, and you would not be able to change input voltage without damaging the pump.

As the quote from the article states, messing with flow rate is a lot of work for likely zero rewards. Whatever you gain in cooling from giving coolant more time in the H/E you lose by giving coolant more time in the hot underside of the Radix. Increasing surface are of the H/E is the much better solution.

Flow rate wouldn't change, but the coolant would have more 'face time' in the heat exchanger, which would mean lower temps for coolant exiting the H/E, then entering the intercooler. Since flow rate stays the same, the ability of the intercooler to remove heat from the underside of the Radix stays the same. This is the superior solution, and what you are talking about here.

 

yep

 

As I stated in post #4
"The flow will slow down in the heat exchanger due to the same volume that the pump is pushing is spread out over a larger area. The water stays in the Hx much longer and has more time to cool off, as you said. The actual velocity of the coolant through the intercooler or through the pump will not change. It will help you get cooler water into the intercooler. The added volume would also help in the rate of temp increase after a long 1/4 mile run."

 

I was not trying to argue with you, just clarify. You have a great idea going with the larger heat exchanger.

If you believe 'flow will slow down' as you state above, what metric would you be using to measure this difference in flow - gal/min, or something else? I'm curious.

 

I will not be using any type of measuring/mathematical device to measure flow. It is just common sense. Example: You have 1 gal/min flowing through a 1" pipe, you then split the inlet to the pipe and now put the 1 gal/min through 3 - 1" pipes. You still have 1 gal/min flowing but is split up through 3 different flowpaths. The velocity of the fluid through each individual pipe will be reduced by approx 1/3. Thus it will stay in the piping longer. You follow me?

 

What did you use for the Heat Exchanger? Is that a small car radiator? I got another heat exchanger that's 3" thick off E-Bay. Same width, and length. I just got to mount it.

 

I am not a fluid mechanic so you are out of my area of expertise. But I would think that once the pipes are full, they would flow the same. They would stay in the pipe 'longer' simply because there is more pipe for them to stay in, not because there is less 'flow.' We are talking volume and surface area, not flow and velocity.

But like I said, we are out of my area of expertise. Some formulas would help. I would dig some up but I have an appointment in a few minutes.