Water Inection
- Thread starter J25GTi
- Start date
corofin12345
Member +
i rigged up one for a subaru before.. made it myself.. just put it on a switch on the steering wheel
Starlet_Sam
Moderator, Regional Area Reps Supervisor & Gay Car
Depends what sort of kit you want. For maximum efficiency you will want a mappable system.
danturbo4311
Member +
wanna makesure the nos doesnt freeze the water lol
J25GTi
Lifer
Yeah, I know a mappable one would be best, but they are nigh on 700quid, but the one I'm looking at is 350 and comes with a controller that enables you to run it off any o-5v signal, I.e map sensor knock sensor etc etc
Or you can run it off a pressure sensor, which I imagine would be more than enough to run it safely?
What do you think?
Or you can run it off a pressure sensor, which I imagine would be more than enough to run it safely?
What do you think?
gorganl2000
Lifer
http://www.aquamist.co.uk/
if you want a proper system...then try aquamist....
people seem to rave about it....so i guess it must be pretty good
and remember,,,you tend to get what you pay for
if you are going to use WI, you might as well get a reputable kit....remember, its your engine you are playing with,,,,,too much water/meth and too little water/meth can both be a disaster
if you want a proper system...then try aquamist....
people seem to rave about it....so i guess it must be pretty good
and remember,,,you tend to get what you pay for
if you are going to use WI, you might as well get a reputable kit....remember, its your engine you are playing with,,,,,too much water/meth and too little water/meth can both be a disaster
Chris@CCM
Member +
J25GTi
Lifer
boost juice
As far as i was aware you didnt want the water to burn, it just cooled it down enabling more knock resistance...
What would the benefit of mixing it with methanol be?
Starlet_Sam
Moderator, Regional Area Reps Supervisor & Gay Car
You use the water for knock resistance as water has infinate octane. The meth is used as both an anti freeze and to cool the intake charge.
J25GTi
Lifer
http://www.methanol-injection.co.uk/product_info.php?cPath=21&products_id=29
Thats the one i was loking at getting, seems like a decent kind of kit, and also is a vacuum kit not a gravity kit, so i can mount a resivoir else where in the car to hold alot more water...
Thats the one i was loking at getting, seems like a decent kind of kit, and also is a vacuum kit not a gravity kit, so i can mount a resivoir else where in the car to hold alot more water...
weeJohn
Lifer
Methanol has a much higher latent heat when burning, which means it burns cooler than petrol does so it lowers combustion temperatures as well as increasing combustion strength.
Water cools the combustion temp by reducing the speed of the burn, giving a longer (better) burn, but not as powerful as meth.
Water injection has been being used in planes since the 1940`s, if it was such a good thing, it would be used more in todays engines, dont you think?
Methanol is very dangerous, its very poisonous, hard to store and extremely combustive so its not for everyday motoring use.
Water cools the combustion temp by reducing the speed of the burn, giving a longer (better) burn, but not as powerful as meth.
Water injection has been being used in planes since the 1940`s, if it was such a good thing, it would be used more in todays engines, dont you think?
Methanol is very dangerous, its very poisonous, hard to store and extremely combustive so its not for everyday motoring use.
azerty
Supermoderator
50/50 water/meth is the way to go.
water is here to cool down combustion temp
Methanol is here to get higher octane value, so you'll be able to add timing or/and add boost as this mixture will be much more resistant to knocks.
also 50/50 water meth is NOT combustive (while 100% meth is freaking dangerous as weejohn just said)
Aquamist is the way to go if you are serious about it...
water is here to cool down combustion temp
Methanol is here to get higher octane value, so you'll be able to add timing or/and add boost as this mixture will be much more resistant to knocks.
also 50/50 water meth is NOT combustive (while 100% meth is freaking dangerous as weejohn just said)
Aquamist is the way to go if you are serious about it...
I found out that water injection will come into its own when pushing the limits of you turbo past it’s effiency range or do not have access to good fuel or tryin’ to run high comp engine with high boost.
Even the high octane rating’s on a fuel does not change the burn rate of the fuel and that is not where you gain. Higher octane rating is jus’ a measurement of the fuel resistance to detonate and has greater stability at high pressures and temps.
The power increase comes from the structure of the fuel mix, low octane fuel mix fuel has hydrocarbons that will not vaporize until 400 degree, where as race gas/high octane fuel might start vaporizing at say 275 degrees. In street application that see’s low rpm, the low octane gas has plenty of time to heat vaporize and burn, but in our ‘race’ engine’s lol, there might not be enough time for the low octane fuel to vaporize at 7200rpm. The engine cannot take full advantage of the fuel’s available energy at high rpm. High octane fuel will vaporize more quickly at lower temps, so it’s poss to burn more fuel in high rpm band = more power. This is also dependant on the comp ratio of the engine. You see water injection being used where there only low octane fuel available at the pumps or pushing serious boost through mid size turbo's.
Even the high octane rating’s on a fuel does not change the burn rate of the fuel and that is not where you gain. Higher octane rating is jus’ a measurement of the fuel resistance to detonate and has greater stability at high pressures and temps.
The power increase comes from the structure of the fuel mix, low octane fuel mix fuel has hydrocarbons that will not vaporize until 400 degree, where as race gas/high octane fuel might start vaporizing at say 275 degrees. In street application that see’s low rpm, the low octane gas has plenty of time to heat vaporize and burn, but in our ‘race’ engine’s lol, there might not be enough time for the low octane fuel to vaporize at 7200rpm. The engine cannot take full advantage of the fuel’s available energy at high rpm. High octane fuel will vaporize more quickly at lower temps, so it’s poss to burn more fuel in high rpm band = more power. This is also dependant on the comp ratio of the engine. You see water injection being used where there only low octane fuel available at the pumps or pushing serious boost through mid size turbo's.
munday
Member +
Dont agree with this comment, if it didnt work then why would they have used it in planes in the first place? The first ever production turbo car came with water and alcohol injection.
The reason car manufacturers dont use it would be because it needs topping up, which the average motorist would probably forget to do, meaning potentially dangerous conditions in the engine.
Water and alcohol injection works perfectly for the purpose it was designed