Club G40 Forum
Technical => Engine and Transmission => Topic started by: dub-disaster on December 09, 2009, 09:01:56 pm
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Just a couple of questions about aquamist
costly I've read in a book that when methanol and water mix gets on alumnium it leaves a White powdery deposit on it and therefore can fuck up a cylinder head any one had this problem? How lung have people been running aquamist and have they seen any sings if this or is what ideas a complete load of crap!
Secondly would it work using aquamist to spray a mist of methanol/water at the intercooler to drop the charge temp due to the evaporating of the methanol removing some if the temp, it was just a thought I had as I cleaned my intercooler with brake cleaner and when ituched it after it was very very cold any one herd of this before does it work or is this idea majorly flawed?!!?
Let me know whAt you all think
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I've not known anyone to have oxidising issues with methanol injection, I suspect you'd have to b injecting too high a methanol-to-water ratio or using too big jets for that to happen. Never go more than a 50:50 mix, never more methanol in the mix than water.
Spraying onto the intercooler will increase the efficiency of the intercooler but it generally wont cool the charge down as much as injecting into the boost pipes. Plus you wont get the extra knock resistance benefits you get from having some methanol in the air & fuel mix inside the engine.
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The injectors i got were full of green crap which ive had to clean out but i need to get some new ones. The ones ive found are sold in ml. what size do i need?
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ml as in millilitres or do you mean mm i.e. millimeters? I get mine from ERL who measure them in mm and I use 0.3mm ones.
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I bought a nozzle off a garden sprayer to make a water injection setup with, never got round to doing it lol.
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probably for the best :D
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I'm sure it's milli litres. There's a 60ml and 120ml (smallest two).
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I'm looking here :
www.snowperformance.eu
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probably for the best :D
;D
As a lover of all things crude but effective, i was just going to pressurise a washer bottle with boost, so when your on boost it sprays water in, the more boost you run the more water it sprays in. You cant inject as much water as with an automated kit as you dont have as much pressure to work with, but for about a fiver I wouldnt mind ;D could always fit 2 ;)
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Tommo- the boost pressure in the pipe and bottle would be the same though... and you wouldn't inject anything...
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You inject it before the comp wheel, where pressure is negative.
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You inject it before the comp wheel, where pressure is negative.
the methanol will eat away the compressor blades
in fact the water/methanol droplet will kill the blades due to the impact forces when the compressor wheel is spinning.
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does the methanol no eat away at the aluminuim head as it goes through the ports aswell ??
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You inject it before the comp wheel, where pressure is negative.
the methanol will eat away the compressor blades
in fact the water/methanol droplet will kill the blades due to the impact forces when the compressor wheel is spinning.
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Im not sure about methanol, but water is fine, people have been doing it for years.
The major drawback is the water can condense in your intercooler, so you are limited to how much you can inject. Although if its cool enouygh in there for condensation then you could argue you dont need it anyway. The other alternative is to run without an intercooler and use the WI as a substitute.
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Condense in the intercooler? I thought when you install aqaumist's you tap it into the back of the throttle body?
Unless there is another way of doing it?
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there's lots of theories about where to inject it. I inject it just after the intercooler, injecting before will decrease the efficiency of the intercooler due to their being less difference in the charge air to the ambient air flowing over the cooler. So I inject it just after the ic so there is enough distance for the atomised water/methanol particles to mix with the charge air. I think you are thinking more of nitrous oxide which s a totally different kettle of fish and does a very different job, but you generally squirt that right into the throttle.
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That makes sense tapping it in after ic for it to atomise properly. I was told by a few people that you usually tap it in to the tb but doing it that way wouldnt give it as much time to atomise. What pressure does your aqaumist come on at?
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Liam installed mine into both, IC and TB, worked well once he'd rewired the boost controller thingy. He had it kicking in off boost then once past 0.6bar it'd switch off, lol. Raced a cossie on the way to bovington airfield track day and was pinking like crazy (ignition and cam timing properly advanced like), luckily we fixed it before i went out on track, lol.
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yeah its quite common to spray it simultaneously down the inlet runners from the back of the inlet manifold too but as well as earlier on in the inlet tract.