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The mkiv Supra Owners Club

Installation of the Aquamist water pump


Kev.O

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Guest DaveWilko

You could use the 4ltr windcreen washer bottle as a reservoir for your water/methanol. Its common practise among the VW/Seat squad. Most windscreen washer fluid is a water/methanol mix anyway so it won't do your windscreen any harm though I don't recommend using washer fluid for injecting in your engine. Having said that, guys in the states do use Wallmart washer fluid which has a high methanol content and costs $5.99 per gallon. When I had the Golf I used lab quality methanol (99.8% pure) mixed with filtered tap water (60% water/40% meth).

Mine was the coolingmist kit and it was as good as having a fmic. The Golf gti logs intake temperature and my intake dropped from 44deg to 18 when the meth kicked in. A few weeks later I fitted a fmic and it on its own dropped the temp to 20 and when I switched on the water/meth it dropped to 16

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Guest DaveWilko

I mounted my pump and a small tank in the boot and had no problems. Don't use a primer pump. The water pumps are very high pressure and very heavy duty so it won't help and might actually hamper flow. I have never heard of a pump failing yet. They don't run all the time, only when your boost reaches a set pressure. Ideally the flow rate should be set on a dyno but I used a straight, empty road and blatted up and down it with a laptop on the seat beside me taking logs from the ecu. (I miss VAGcom lol. It was free and you could read huge amounts of info from the Golf ecu)

 

edit: pics added

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Guest DaveWilko

You can use 100% water if you like. If the pipes and tank are inside the car it's unlikely that it will freeze. The water does most of the cooling. The meth just mixes with the fuel and raises the octane rating. There is some debate on the VW forums about the effects of methanol on aluminium castings (methanol corrodes aluminium) but there haven't been any problems reported. I ran it for a year and had no problems at all.

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Sorry forgot about this, i will have to check, but i think you do use the DDS3 junction box, but AFAICR the box provides a negative trigger for the primer pump, you just wire it with a + feed, but i will double check mine for you later.

 

That would be perfect, thanks Dick.

 

I'm going to use a separate water bottle installed in the boot, next to both pumps.

 

I'm guessing the extra primer pump goes between the tank and the ERL pump?

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You can use 100% water if you like. If the pipes and tank are inside the car it's unlikely that it will freeze. The water does most of the cooling. The meth just mixes with the fuel and raises the octane rating. There is some debate on the VW forums about the effects of methanol on aluminium castings (methanol corrodes aluminium) but there haven't been any problems reported. I ran it for a year and had no problems at all.

 

After taking a few peoples advice, I have ran all the pipework inside the car next to the rear screen water feed.

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I mounted my pump and a small tank in the boot and had no problems. Don't use a primer pump. The water pumps are very high pressure and very heavy duty so it won't help and might actually hamper flow. I have never heard of a pump failing yet. They don't run all the time, only when your boost reaches a set pressure. Ideally the flow rate should be set on a dyno but I used a straight, empty road and blatted up and down it with a laptop on the seat beside me taking logs from the ecu. (I miss VAGcom lol. It was free and you could read huge amounts of info from the Golf ecu)

 

 

So you really don't advise the use of an extra pump?

 

(I should've used the multi quote function :rolleyes:)

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Guest DaveWilko

I don't honestly see the need for it. You would be feeding a very high performance pump with a weedy little pump. The aquamist pump could easily be sucking the water in faster than the primer pump could supply it. Would this not put more strain on the main pump cos it has to pull water through the primer pump? It doesn't mention primer pumps on the u.s. sites and coolingmist certainly don't sell them and they are using the kits with stonking great V8s. My Golf was running 22psi boost, 1800cc and the flow rate adjustment grub screw on the pump was turned down by 14 turns to stop drowning the engine!

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If your using the Aquamist pump, then a priming pump is recommended, and will increase flow rate,

Just had a quick look at my wiring, i have V1 box but i think the later one is much the same with a few add ons, anyway you just use the P Pump + and - to trigger a relay, so you can power up the priming pump from a higher amp source, i use my amplifier power supply, straight from the battery, don't forget to fuse it:)

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Guest DaveWilko

I still have the kit lying in the garage. All this talk is putting me in the notion to plumb it into the supe :D

What is putting me off is I have no way of setting it up accurately without using a dyno. If the flow is set even slightly too high you will lose power.

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I don't honestly see the need for it. You would be feeding a very high performance pump with a weedy little pump. The aquamist pump could easily be sucking the water in faster than the primer pump could supply it. Would this not put more strain on the main pump cos it has to pull water through the primer pump? It doesn't mention primer pumps on the u.s. sites and coolingmist certainly don't sell them and they are using the kits with stonking great V8s. My Golf was running 22psi boost, 1800cc and the flow rate adjustment grub screw on the pump was turned down by 14 turns to stop drowning the engine!

 

 

 

The Aquamist pump is quite different to the Coolingmist pump, the Aquamist is a high pressure low-ish flow type, whereas the Coolingmist pump is a high flow type, so the Aquamist will benefit greatly from using a primer pump.

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If your using the Aquamist pump, then a priming pump is recommended, and will increase flow rate,

Just had a quick look at my wiring, i have V1 box but i think the later one is much the same with a few add ons, anyway you just use the P Pump + and - to trigger a relay, so you can power up the priming pump from a higher amp source, i use my amplifier power supply, straight from the battery, don't forget to fuse it:)

 

If I were to use a small primer pump, could I not just connect in parallel to the ERL pump as this goes through a relay as the cable feeding it is a decent size already?

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Guest DaveWilko
If your using the Aquamist pump, then a priming pump is recommended, and will increase flow rate,

Just had a quick look at my wiring, i have V1 box but i think the later one is much the same with a few add ons, anyway you just use the P Pump + and - to trigger a relay, so you can power up the priming pump from a higher amp source, i use my amplifier power supply, straight from the battery, don't forget to fuse it:)

 

Sorry Ricky. I defer to your greater knowledge. I haven't any experience of aquamist pumps. Most other kits use the same pump with their own label on it (devilsown, snowperformance, coolingmist) :taped:

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If I were to use a small primer pump, could I not just connect in parallel to the ERL pump as this goes through a relay as the cable feeding it is a decent size already?

 

Yes i guess you could, but the purpose of the priming pump circuit is to pre load the main pump, it actually fires it up before the main pump turns on.

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Sorry Ricky. I defer to your greater knowledge. I haven't any experience of aquamist pumps. Most other kits use the same pump with their own label on it (devilsown, snowperformance, coolingmist) :taped:

 

I know a fare bit about the Aquamist stuff (long conversations with Richard Lamb) but little about the Coolingmist, but i think the reason for the switch to Coolingmist pumps on the new Aquamist kits is precisely down to the latter's flow and pressure ability's, so it won't really need a primer:)

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Yes i guess you could, but the purpose of the priming pump circuit is to pre load the main pump, it actually fires it up before the main pump turns on.

 

I understand what you are saying, but the way the HFS 5 wiring diagram shows, the main pump is connected via a relay, which is triggered from P.Relay + and P.Relay - in the V8 J.B. I can't see how putting my new relay in the same output will be any different than using the existing relay in the boot.

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Guest DaveWilko

Where are you getting your meth from Kev? I had serious bother locating a supplier. No problem if I wanted a 50 gallon drum but that would have been a tad expensive, not to mention a bit dangerous to store lol. I eventually found a laboratory supplier who sold me 5litre aluminium bottles at £20 each. I still have 4 bottles left and a stainless pipe with the nozzle boss welded in so I may as well use it. Will be useful now we are heading into warmer weather. Even now my boost drops from 0.99bar at 6am to 0.92 at 4pm

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Where are you getting your meth from Kev? I had serious bother locating a supplier. No problem if I wanted a 50 gallon drum but that would have been a tad expensive, not to mention a bit dangerous to store lol. I eventually found a laboratory supplier who sold me 5litre aluminium bottles at £20 each. I still have 4 bottles left and a stainless pipe with the nozzle boss welded in so I may as well use it. Will be useful now we are heading into warmer weather. Even now my boost drops from 0.99bar at 6am to 0.92 at 4pm

 

I'm not sure if I'll run meth to be honest. I'm not even sure where to look if I did decide to :(

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I understand what you are saying, but the way the HFS 5 wiring diagram shows, the main pump is connected via a relay, which is triggered from P.Relay + and P.Relay - in the V8 J.B. I can't see how putting my new relay in the same output will be any different than using the existing relay in the boot.

Can anyone confirm what I have said above is correct or incorrect. Thanks.

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Where are you getting your meth from Kev? I had serious bother locating a supplier. No problem if I wanted a 50 gallon drum but that would have been a tad expensive, not to mention a bit dangerous to store lol. I eventually found a laboratory supplier who sold me 5litre aluminium bottles at £20 each. I still have 4 bottles left and a stainless pipe with the nozzle boss welded in so I may as well use it. Will be useful now we are heading into warmer weather. Even now my boost drops from 0.99bar at 6am to 0.92 at 4pm

 

I'm not sure if I'll run meth to be honest. I'm not even sure where to look if I did decide to :(

If you run methanol, get it from a decent model shop, one that sells RC cars and planes etc. They run on methanol. The one by me sells it in 1 gallon containers for £7.00 each.

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I understand what you are saying, but the way the HFS 5 wiring diagram shows, the main pump is connected via a relay, which is triggered from P.Relay + and P.Relay - in the V8 J.B. I can't see how putting my new relay in the same output will be any different than using the existing relay in the boot.

 

Anyone? :innocent:

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  • 1 year later...
Guest BamaDave

Kev. O,

Did you ever get your Aquamist HFS-5 installed and if so I would love to hear the details! :D

 

Thanks,

 

David

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  • 3 months later...
  • 1 month later...
How'd this go Kev?

 

Sorry Mark, I completely over looked this post.

Ryan and I ran out of time to set the WI up properly last time we met up. Not to worry though, as I'll be seeing him when I get the turbo re-mapped, after I've bedded the clutch in (just need to fit it ;)).

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