Water/methonol injection
- Thread starter fur
- Start date
azerty
Supermoderator
Phil, it all depends wich kit you go for. some kits need to be controlled from and ECU, some don't.
the simpliest kits just switch on WI pump when a certain boost is reached (0.7 bar for exemple). This is a very simple way of working you will get more water/meth close to peak torque region, wich is were you will need it the most anyway.
Aquamist 1S
then you have progressive kit, that can vary the pump speed to vary the flow. I'm not realy fan of the low entry Progressive kits as the flow won't be constant anyway.
Only exeption to this was the PERRIN kit as it was using an aquamist Racepump intead of the comonly used shulfo pump progressive kits.
Then you have high speed valves kits that pulse the flow pretty much like an injector do. Aquamist offers kits using this system. some of this kits will just read from one of your fuel injector and copy its flow. those are my favorites system. both HFS-5 and PERRIN kit are working this way. the difference is the PERRIN use a RacePump with no highspeed valve, while the HSF-5 use a shulfo pump with high speed valve. HSF-5 has faster response and wider flow range.
If cooling down is your main concern, you can place nozzle just before IC, this will get your temp the lowest you can. now the closest your nozzle are to combustion chamber, the most reactive it will be... you could also place two smaler nozzles, one just before IC, then an other one just before throttle body
Some guys place nozzle just in front of turbo, but Munday explained it has some downsides I wouldn't risk
I've just been confirmed PERRIN PWI-1 has just been discontinued, but some kits are still available in online shops, might be time to grab one while you still can
Fur, are you using Aquamist 2D by any chance ?
the simpliest kits just switch on WI pump when a certain boost is reached (0.7 bar for exemple). This is a very simple way of working you will get more water/meth close to peak torque region, wich is were you will need it the most anyway.
Aquamist 1S
then you have progressive kit, that can vary the pump speed to vary the flow. I'm not realy fan of the low entry Progressive kits as the flow won't be constant anyway.
Only exeption to this was the PERRIN kit as it was using an aquamist Racepump intead of the comonly used shulfo pump progressive kits.
Then you have high speed valves kits that pulse the flow pretty much like an injector do. Aquamist offers kits using this system. some of this kits will just read from one of your fuel injector and copy its flow. those are my favorites system. both HFS-5 and PERRIN kit are working this way. the difference is the PERRIN use a RacePump with no highspeed valve, while the HSF-5 use a shulfo pump with high speed valve. HSF-5 has faster response and wider flow range.
If cooling down is your main concern, you can place nozzle just before IC, this will get your temp the lowest you can. now the closest your nozzle are to combustion chamber, the most reactive it will be... you could also place two smaler nozzles, one just before IC, then an other one just before throttle body
Some guys place nozzle just in front of turbo, but Munday explained it has some downsides I wouldn't risk
I've just been confirmed PERRIN PWI-1 has just been discontinued, but some kits are still available in online shops, might be time to grab one while you still can
Fur, are you using Aquamist 2D by any chance ?
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i'm using a shurflo pump, aquamist nozzle and a high speed high frequency solenoid
it is being controlled from my megasquirt standalone
right now it is cutting in with a fixed flow from 10psi until 15 psi which is full boost as the engine is a stock 5efe, once i work out a few kinks unrelated to the water injection i will use pulse width modulation to control the high speed solenoid like an injector to get varying flow depending on load, that way i can turn on the injection from earlier but with alot less water/methanol
it is being controlled from my megasquirt standalone
right now it is cutting in with a fixed flow from 10psi until 15 psi which is full boost as the engine is a stock 5efe, once i work out a few kinks unrelated to the water injection i will use pulse width modulation to control the high speed solenoid like an injector to get varying flow depending on load, that way i can turn on the injection from earlier but with alot less water/methanol
you went for a serious WI setup !!
I beleive emanage ultimate could use its fifth injector map feature to control a high speed valve too. this would do a nice WI setup if anyone is motivated enough to try it out
i had it setup with emanage last year
both emb and emu can use the subinjector controller to do it
and use pulse widths % just like a normal injector, emu does it really well indeed, but the high speed solenoid valve is the key to a proper setup
braindamage
Member +
Well i have been running water/methanol in my starlet for about a year now and with this setup i can run more timing and it keeps the egt's down.It kicks i at about 12psi and got a gallon tank and pump in my trunk
azerty
Supermoderator
Fur, I didn't know you had it working with EMU, great to know it works then
yep, high speed valve is the key, I don't like all those intermediate setups that vary shulfo pump speed (progresive setup). the perrin kit was the only progressive kit I liked as it use a race pump which is totaly different system (pulse instead of rotating). do you use Aquamist high speed valve ? or coolingmist ? or any other brand ?
yep, high speed valve is the key, I don't like all those intermediate setups that vary shulfo pump speed (progresive setup). the perrin kit was the only progressive kit I liked as it use a race pump which is totaly different system (pulse instead of rotating). do you use Aquamist high speed valve ? or coolingmist ? or any other brand ?
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in theory yes, but this will depend greatly on how much heat you can get out before combustion
water injection is a two fold thing, first it does intercooling by removing some of the heat before combustion and then again during combustion it absorbs once more
only the first part can be of benefit to an out of efficiency turbo as the hot air will require cooling prior to reaching the combustion chamber so that it increases density and by extension allows more air molecules into the mix
any effects of the WI while in the combustion chamber only stave off det, they won't compensate for a blower pushing hot air