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  #21  
Old 22-09-2014, 05:26 PM
Dust Dust is offline
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Location: Frankfort, Kentucky
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Default Re: Using Aquamist for brake cooling system!?

That pump looks very similar to the flojet pump that Howerton used for the motorcycle injection kit. An Aquatec will be your best bet, and 3/8" female NPT heads are available. I've got one that I bought to replace the head on a Coolingmist kit but sold before I got the head in.
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  #22  
Old 24-09-2014, 05:10 PM
markff markff is offline
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Default Re: Using Aquamist for brake cooling system!?

Well the fittings all showed up today to test what this pump actually puts out.

I was shocked to be honest, i really thought that i might get 50-60 psi of pressure out of the pump before it ran out of puff. I tested the pump the other day connected directly to the car battery with the engine running so the full 14v and wound the pressure adjustment screw in all the way. It made a great mist but i still didnt know the pressure.

Anyway today i tested it on a tiny 1.2ah 12v cell that measures 12.7 volts with no load. Connected everything up and fired it up. The pump straight away went up to 125psi and held there during the duration of the test apart from when the battery start to lose charge. I really was not expecting 125psi and the mist from the pump is smooth no annoying pulses that you get with pressure switches.

?11.50 odd for the pump which i think is good going seeing the results i get. Especially when you think its flowing 500ml+ at 125psi.

Video of the test

https://www.youtube.com/watch?v=WQ8VqX05_uU

Im planning on winding the pressure down abit to lower the current and possibly give the pump abit of extra life. After 10 minutes of constant running it gets reasonably hot but in theory on track it will run for 50-60 seconds per 2:30 lap so it will get some rest time.
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  #23  
Old 24-09-2014, 05:50 PM
stevieturbo stevieturbo is offline
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Default Re: Using Aquamist for brake cooling system!?

definitely a bargain !
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  #24  
Old 11-01-2015, 05:29 PM
Martin RS8 Martin RS8 is offline
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Default Re: Using Aquamist for brake cooling system!?

Have you tested it yet?

I need water spray on both front and rear brake discs on my car,
I have big 365mm in front and 325mm in rear but they still gets to hot on the race track and I have not room for air intake for brakes in my front,
So water is the only solution for me, but I don't know what I should buy.
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Audi S8 with RS6 engine = RS8
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  #25  
Old 11-01-2015, 05:43 PM
stevieturbo stevieturbo is offline
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Default Re: Using Aquamist for brake cooling system!?

Quote:
Originally Posted by Martin RS8 View Post
Have you tested it yet?

I need water spray on both front and rear brake discs on my car,
I have big 365mm in front and 325mm in rear but they still gets to hot on the race track and I have not room for air intake for brakes in my front,
So water is the only solution for me, but I don't know what I should buy.
What pads/discs are you using ?

It'd be interesting as well to get some IR temp sensors if they work in a suitable range, to actually see what sort of disc temperatures are being seen.
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  #26  
Old 11-01-2015, 06:38 PM
Martin RS8 Martin RS8 is offline
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Default Re: Using Aquamist for brake cooling system!?

First I had XP10 in front and XP8 in rear
But when my Carbotech XP10 was worn out I put in PFC 08 in front.
PFC = Performance Friction.

But I have the biggest problem with the rear brakes, I think it's because there is only one piston calipers so then there is very little brake fluid in them so that the brake fluid gets overheated.
I have RBF600 brake fluid and replace it in the rear brakes after every track day and the old brake fluid is almost black every time!

I have Audi RS6 C5 brakes in front and Audi RS4 B7 in rear.
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Audi S8 with RS6 engine = RS8

Last edited by Martin RS8; 11-01-2015 at 06:41 PM.
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  #27  
Old 11-01-2015, 06:49 PM
Martin RS8 Martin RS8 is offline
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Default Re: Using Aquamist for brake cooling system!?

Here you can see my front discs glow in the dark

http://youtu.be/dh303VbH0ms
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  #28  
Old 11-01-2015, 09:56 PM
stevieturbo stevieturbo is offline
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Default Re: Using Aquamist for brake cooling system!?

Glowing discs is common and always looks cool, but with the right pads it doesnt mean they stop working.

Is the fluid actually boiling ?

I've had good luck in the past couple of years using Carbon Lorraine pads, they do some pretty extreme stuff.

Or if it is largely a fluid issue, what about one of those devices that allows fluid to circulate within the system which should prevent fluid boiling ?

Sounds like a cool car, love the S8's !
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  #29  
Old 12-01-2015, 09:06 AM
Martin RS8 Martin RS8 is offline
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Default Re: Using Aquamist for brake cooling system!?

If I run hard too long time, over 20 minutes on the race track, then will the brake fluid boil and brake pedal goes to the bottom!
But it's always my rear brakes that has the problem, because the brake fluid in my front 8 piston calipers is always clear and fine when I bleed them.

The advantage of water spray is that you get longer life of the brake discs and pads, and you do not have to run multiple cooling lap each time you want to run into the pits.

And even though I run several cool-down laps it crackles and snaps always from the brake discs due to the heat when I stand still in the pits after the run.
So I putts car back and forth so not the brake pads will burn into the disc
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Last edited by Martin RS8; 12-01-2015 at 09:18 AM.
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