Coolant System

[Monster-Mat]

anyone understand fluid dynamics,in respect to a vehicle cooling system i need a few pointers in the design of the new coolant system, i have it worked out just need to know if my understandings and plans are correct

[Jocksuper7]

in what respect mate?

i have several textbooks to hand depends what you are looking for

[Monster-Mat]

ok, as i am V mounting the radiator

Rear view

Side view

i need to do some modifications to the radiator system.

what i am doing is welding the top of the rad closed (where the old filler and neck was), i have a aluminium header tank which will be mounted where the Battery is on the std is200, my intention is to run the feed from the header tank into the bottom pipe from the block to the rad, and the return bleed pipe from the radiator top pipe back to the header tank..(also in the top pipe, more than likely ontop of the radiator there will be a bleed screw...will this work ok

Edited March 13, 2006 by Monster-Mat

[Mr Morse]

Yes - as it is a sealed system and all you are doing is repositioning the filler cap / header tank I can't see any major problems apart from the obvious air locks

[Fargo]

pop over to the wizard of nos forums,, theres a guy called Loopy, he Knows his fluid dynamics..

[Monster-Mat]

what obvious airlocks, the highest point is the header tank, the highest point on the radiator is the outlet for the return to the engine, out of the top of the outlet is the bleed return back to the header tank, i cant see any obvious airlock locations in the system.

to be honest im actually basing this on a TRD works race car design

you can see the header tank in the right hand top corner, and the feed and bleed pipes connected to the coolant pipes

[Mr Morse]

C'mom Mat I'm not trying to pull the "grannies suck eggs".......any radiator based cooling system is going to have air traps...

[Monster-Mat]

C'mom Mat I'm not trying to pull the "grannies suck eggs".......any radiator based cooling system is going to have air traps...

ah i thought you was meaning you could see a flaw in my plan.....

i actually think my set up is slightly better layed out in the fact my bleed return will be intop of the radiator, and not the return coolant pipe as on the TRD car....we will see

Edited March 13, 2006 by Monster-Mat

[MacRS200]

Maybe I'm being thick but how does the coolant circulate before the thermostat opens on your design Mat? On the TRD one it looks like it returns direct from the head/block to the tank.

[Monster-Mat]

erm your looking at the breather system on the oil catch can, the coolant header tank is the small tank next to the oil catch can.

coolant doesnt circulate untill the thermostat opens, thats the idea of the thermostat

the idea of the header tank on my system and the TRD one, and any header tank set up to be honest is that the header tank creates the warm loop bleed to get the air out, there is no point bleeding air out of the cold side of the thermostat

Edited March 14, 2006 by Monster-Mat

[MacRS200]

erm your looking at the breather system on the oil catch can, the coolant header tank is the small tank next to the oil catch can.

Opps, see the header now

coolant doesnt circulate untill the thermostat opens, thats the idea of the thermostat

the idea of the header tank on my system and the TRD one, and any header tank set up to be honest is that the header tank creates the warm loop bleed to get the air out, there is no point bleeding air out of the cold side of the thermostat

The coolant doesn't circulate round the radiator until the stat opens but it does circulate round the head and block. Like you say the idea of the thermostat is to allow the engine to warm up quickly.

I thought that the header tank was part of the circuit before the stat opened.

[Monster-Mat]

erm your looking at the breather system on the oil catch can, the coolant header tank is the small tank next to the oil catch can.

Opps, see the header now

coolant doesnt circulate untill the thermostat opens, thats the idea of the thermostat

the idea of the header tank on my system and the TRD one, and any header tank set up to be honest is that the header tank creates the warm loop bleed to get the air out, there is no point bleeding air out of the cold side of the thermostat

The coolant doesn't circulate round the radiator until the stat opens but it does circulate round the head and block. Like you say the idea of the thermostat is to allow the engine to warm up quickly.

I thought that the header tank was part of the circuit before the stat opened.

nope its not, even look at your own car, the header/overflow tank is affixed to the back of your radiator

[MacRS200]

I thought that the header tank was part of the circuit before the stat opened.

nope its not, even look at your own car, the header/overflow tank is affixed to the back of your radiator

I knew that, I checked the coolant level last week

[Monster-Mat]

:D ...

well i should have the new aluminum header tank in a couple of weeks, just trying to find the aluminum pipes and getting the radiator welded...........and finding aluminum weld on bosses to accept the unions...and.....and.....

thanks guys fo your imput

Edited March 14, 2006 by Monster-Mat

[BAGGY]

Hi mate you might want to consider one of these

they help disperse the air from the coolant making

the system more efficient and keeps ECT at a minimum.

(its a swirl pot by the way)

[Monster-Mat]

yep was considering a swirl pot, instead of running the bleed tube from the top of the radiator,

its something which can easily be added afterwards

Edited March 14, 2006 by Monster-Mat

[jasper]

thought u wanted the technical calculations, did fluid dynamics as part of degree course

can dig my old books up if required

[MacRS200]

thought u wanted the technical calculations, did fluid dynamics as part of degree course

can dig my old books up if required

Can you remember the "Steady Flow Energy Equation for Incomressable Fluids"?

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I Can't :D