Plumbing in leccy water pump and external bypass thermostat
Turbo Mini Forums

Righty then, ive drawn a diagram of what I plan to do and im after some input/advise from you guys, whether you think this will work or if there is a better solution to where hoses are connected?

Cheers
Matt

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1/4mile in 13.2sec @ 111 terminal on 15psi

bollox is the attachment coming up?

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1/4mile in 13.2sec @ 111 terminal on 15psi

no its not mate.

posted on behalf of matt as his computer is shite...

Cheers mate..

I still can't see it just a cross as dial-up doesn't seem to like photobucket! lol

Doesn't make much odds to me as I have the original though.

Main concern is the expansion, hose? Will the pump try and draw from this and cause cavitations? On the other hand if I move it to the pressure side of pump will it over pressurise the expansion?

EDIT: another valid point Ian has made is about the water returning from the turbo will this cause the thermostat to open to early?

Edited by matty on 11th Feb, 2008.

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1/4mile in 13.2sec @ 111 terminal on 15psi

I had strange results from my water cooled turbo,,, Best way - if possible - is to return the water out of the turbo into the top of the radiator via its own pipe.

So long as the electric pump is as low as possible - ideally below the water jacket in the block - it shouldn't cause any problems I reckon...

Ah right...Still haven't decided on pump yet but there should be enough room to mount it on the subframe so no problems with getting it lower than the water jacket.

So do you think it is ok to have the expansion hose on the same side of the pump thats drawing as opposed to the pressure side?

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1/4mile in 13.2sec @ 111 terminal on 15psi

What do you mean?

how does that 3 port thermostat work matt ? is there any chance of it all going down the bypass pipe into the pump and not through the rad at all ?
also have yoiu forgotten the heater ?

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

In that drawing the hose going to the expansion tank is on the side of the pump that with be drawing in water and im unsure if the pump will try and draw water from the expansion tank aswell causing cavitations?

On ther other hand if I put the hose going to the expansion tank on the pressure side will it over pressurise it causing it to let water out of the cap?

I know on a the "normal" setup with mechanical pump, I had the expansion tank coming off the heater hose and it was fine but that also had water coming from the heater matrix going back into the bottom rad hose so it always had a supply of water so if it were to draw water from the heater hose it would never cavitate?

If that makes any sense? Lol

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1/4mile in 13.2sec @ 111 terminal on 15psi

Edited by matty on 11th Feb, 2008.

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1/4mile in 13.2sec @ 111 terminal on 15psi

The bypass thermostats shut of flow to the bypass port as the thermostat opens to the radiator

Ah cool, if thats the case this setup should hopefully be ok!

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1/4mile in 13.2sec @ 111 terminal on 15psi

The expantion tank is plumbed into the suction side of the pump and the vent plumbed into the highest point of the cooling system, usualy at the top of the head before the thermostat. this will force the air out at the top and the coolant in at the bottom. As Dave said, best to plumb the turbo return into the top of the rad after the thermostat.

Ok that makes sense. Would it be ok to run a bleed from the head outlet pipe and tee that into the rad vent and run them both to the expansion?

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1/4mile in 13.2sec @ 111 terminal on 15psi

If the high pint of the vent in the radiator has a low point between it and the expansion tank then it will remove any air bubbles that might form there. Good idea I say :d