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The mkiv Supra Owners Club

Installation of the Aquamist water pump


Kev.O

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I've bought the HFS-5 and looking for options of where to mount the pump and water bottle. As the new pumps are alot larger than the old style ones, I'm considering installing it in the boot along with the water bottle. Will this cause any problems ie lower pressure when the water reaches the jets/will the pump have to run harder in order to pump the water further (thus reducing the life of the pump)? Has anyone other than Tricky installed the pump and bottle in the boot?

 

TIA

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If that is the system that uses the HSV then you have nothing to worry about by putting the pump/tank in the boot as the pump will just maintain pressure, its not like it has to keep up with the HSV as the pump is more than capable of providing enough volume, if you want to add a primer pump it will help flow even more, i just use a washer pump run from the DDS3 trigger.

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The manual refers to 'applications involving methanol mix beyond 50%'. I knew I read it somewhere though it isn't relevant in my case :). Did you run the line along with the power cable? As I have the brake and fuel line covers off, are there any disadvantages of running it under the car?

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  • 3 weeks later...
If that is the system that uses the HSV then you have nothing to worry about by putting the pump/tank in the boot as the pump will just maintain pressure, its not like it has to keep up with the HSV as the pump is more than capable of providing enough volume, if you want to add a primer pump it will help flow even more, i just use a washer pump run from the DDS3 trigger.

 

Dick will this bottle be suitable for the install? I should be able to use the motor as a primer pump right? :)

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Dick will this bottle be suitable for the install? I should be able to use the motor as a primer pump right? :)

 

I purchased a proper water injection alloy tank with foam inside to prevent surge causing intermitent flow, I found several on ebay and in Demon Tweaks, I am having my Aquamist fitted into the boot also, and wanted a larger tank capacity and cooler position

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Dick will this bottle be suitable for the install? I should be able to use the motor as a primer pump right? :)

 

It should be fine, but you will need to check the level frequently, and yes you can use the pump as primer pump, it powers from DDS3 v8/box,

i have used a 5lt water carrier from a camping shop, works fine, and no surge problems if kept at a reasonable level, and apart from that a primer pump will stop surge anyway.

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I purchased a proper water injection alloy tank with foam inside to prevent surge causing intermitent flow, I found several on ebay and in Demon Tweaks, I am having my Aquamist fitted into the boot also, and wanted a larger tank capacity and cooler position

 

Where did you eventually buy it, and do you have any pictures please? Who's doing your install btw :innocent:

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It should be fine, but you will need to check the level frequently, and yes you can use the pump as primer pump, it powers from DDS3 v8/box,

i have used a 5lt water carrier from a camping shop, works fine, and no surge problems if kept at a reasonable level, and apart from that a primer pump will stop surge anyway.

 

I must admit the capacity did worry me a little. Having the pump already fitted is a bonus though.

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Rather than starting a new thread, I thought I would ask a question in this one. It shows in the manual the power for the DDS3 coming from the ECU, is this ok as it's protected by a 3.15 amp fuse so I'm assuming it's going to pull a little bit of power.

 

TIA

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Rather than starting a new thread, I thought I would ask a question in this one. It shows in the manual the power for the DDS3 coming from the ECU, is this ok as it's protected by a 3.15 amp fuse so I'm assuming it's going to pull a little bit of power.

 

TIA

 

Should be fine mate, i have run lots of electronics off the ECU feed without any problems.

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I thought I would post up a picture of where I intend to mount the flow sensor. I made up a plate for several of my parts to be mounted on to keep them all in one place and tidy.

 

image

 

I put the heat shrink on the tube incase it rubs against the edge of the DLI.

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  • 2 months later...

I've ran two extra cables into the boot of my car so I can use a priming pump. Two questions, can anyone recommend a decent priming pump that uses 6mm ends? And the other question is, where should I wire the ground and positive inside the DDS3 JB? Many thanks.

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After having a read on the waterinjection website, I now realise that I don't need to connect the primer pump wires in the junction box itself as the output is only rated at 0.25amps. I'm guessing I just run the primer pump in parallel with the ERL pump, cutting into the wires after the relay?

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