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I am splitting cooling systems, but with true circulation tank, with bottom outlet, upper inlet tank (currently eyeballing 2015 C class tank, pending verification of size) and not just a BMW compensation bottle, in effort to circulate all fluid, and increase the overall thermal capacity of the low temp coolant circuit.
I was wondering if anyone know off the top of their head, what size is the main coolant bottle hose at the H couplet?
Have you identified a space for your C class tank ? Ive been surprised how little room there is in the Sl55 for anything extra !
Same vacinity as the BMW tank, but I like the idea of Mercedes PN, that looks more stock with matching cap.
But the main reason I looked into the C class tank is it has the same size inlet and outlet, I am thinking of using straight 3/4" in and out, and make the bottle part of the circuit path, instead a compensation T and breather.
I am thinking to route the intercooler hot exit 3/4" line into the inlet of the bottle, and its outlet to go down straight into the pump.
This way the system will be full self bleeding, and will constantly circulate the entire contents of the bottle, instead of the portion that flows out of the T
But if pump flow fluctuates, and is not regulated, can this design cause the pump to swallow air?
I am not a cooling expert, nor trained on flow calculation, and my knowledge comes from basic thermodynamics training and physics as part of my formal engineering studies, so I could be missing the obvious, input is welcome
I am thinking to route the intercooler hot exit 3/4" line into the inlet of the bottle, and its outlet to go down straight into the pump.
This way the system will be full self bleeding, and will constantly circulate the entire contents of the bottle, instead of the portion that flows out of the T
But if pump flow fluctuates, and is not regulated, can this design cause the pump to swallow air?
I am not a cooling expert, nor trained on flow calculation, and my knowledge comes from basic thermodynamics training and physics as part of my formal engineering studies, so I could be missing the obvious, input is welcome
What do you reckon the rough capacity of that tank is ? Thats quite a good find though for a tank with two large 3/4 connections, most seem to have one 3/4 and then bleed and expansion ports.
I would imagine thats the right way round for the flow, ie in theory there will always be a head of coolant for the pump to draw from. - Unless acceleration / cornering pushes the fluid to one side of the tank and away from the outlet ?
Has this tank got a smaller port for the bleed line from the heat exchanger in the supercharger ?
oh dear, whats happened with the ' until now that is ' ?
Just mean i have only been running it for half an hour .... still breaking it in .... topping fluid and some minor adjustments ..... more pics. and info next week ..... car has been standing for almost 6 years .....
Just mean i have only been running it for half an hour .... still breaking it in .... topping fluid and some minor adjustments ..... more pics. and info next week ..... car has been standing for almost 6 years .....
Your system as designed, is impossible to bleed, you need a vent at the highest point of the circuit.
That is not the question, the question is regarding how to split it.
Compensation tank, Vs flow tank.
Obviously, the second design will cool better, and bleed quicker, but my concern if the fluid capacity in bottle is not enough, fluctuation in pressure, along with driving dynamics, can cause air to make its way into the bottom of the bottle... not to mention the upper hose dumping fluid at full force can cause some bubbling and foaming concerns, again, causing air to circulate in the system
Put in a trunk tank, split the system, and call it a day.
We've already established splitting the system, we're past that point, the debate now is to do circulation bottle or compensation bottle split (post #12).
Trunk tank is not going to happen, the car is a daily driver, I need the spare and trunk space.
08-11-2018, 05:16 PM
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