Code words for you; Iam on holiday. Like ur idea, will refine it and try approach. Measure the delta water as i have flow meter gives BTU directly. Taaaaaa. Daaaaaa. Like it, Woody




QUOTE=Billy22Bob;710449]IC (InterCooler) is in the front of the car.....some cars have air/air - ours has air/water....
CAC (Charge Air Cooler) is what the Inlet air goes through on its way to the manifolds and the cooling water picks up on its way to the IC (at the front of the bumper)

Looking forward to definitive evidence that increased flow = more heat removal.

It's your show but.....
Can I suggest you work in reverse as "addition of heat" is the same is "extraction of heat".

Setup your vacuum through the CAC with a constant flow of say your 250cfm - although it would be good to test at least 2 flows by throttling the downstream side of the Vac. Dont throttle the inlet to the CAC as you have in previous videos as it will reduce pressure and lower the air density/heat capacity.

Now setup a hot and cold water tap with a temperature sensor and run it through the CAC at 2.7GPM.....turn the hot and cold taps until you get 100F in the water and 2.7Gpm.....measure the temp coming out of the CAC water side.
Now measure you ambient and the discharge temp from the cooler....and see how much temp the air side picks up from the hot water - as opposed to how much it looses (when it's in the car)...like I said - forward and reverse heat transfer across the CAC should be the same (in our range of operating parameters).

You now have a test bench!
You could go one step further and measure the air flow through the CAC.
With this rig you could
change the water flow rate whilst keeping the inlet temp constant.
change the water inlet temperature whilst keeping the flow constant
change the vacuum intake volume whilst keeping the other 2 constant and....etc....

You might even be able to use the warm air discharge from the vac for a couple of tests.....

At each test you are calculating the BTU's/hr removed from the water. Knowing the inlet temp and outlet temp from the CAC water and the inlet flow rate - that's your BTU's/hr (assume 4.2kJ/kg for water cp.)

Given the aluminium block itself is a source of capacity - before turning on the water, I'd let the air stabilise for a minute before taking a reading. You might even glean some info on how long it takes the system to equilibrate after you actually do turn the water on - thermal inertia that is....

If I had "do-erability" as opposed to "sit on my a$$ think and gunna-ability".....
and of course if I had spare CAC lying around - I'd give it a go myself.....but as I said - it's your show. Keep up the good work.[/QUOTE]