water injection

[kniever]

-just wondering how water injection works
-how much power gain there is
-and how to set it up

any info would be great

[immortality]

water injection works just like an intercooler, the water absorbs the heat cooling the intake charge. it has the bonus effect of steam cleaning your engine from the inside.

[vn calais manual]

begin: the water injection vs intercooler argument =)

[kniever]

so how is it set up and where? is it before the throttle body?

[weedo_86]

i got a set up to go on my charger, it injectors a fine mist before the throttle body

[vnv8driver]

cooling the intake temperatures is a benefit of water injection but the main reason is to increase compression in the combustion chamber, not alot of power is to be made with a water setup but works wonders on a worked motor.

[immortality]

begin: the water injection vs intercooler argument =)

i don't see it as an argument. each has a purpose and a fuction, to achieve a similar end result. intercooling is only really suitable for FI setups as it is used to reduce the heat introduced by what ever means fo forced induction your using. water injection can be used with either FI or N/A. the great thing with water injection is that you can also mix it with alcohol (50:50 mix) for good results

[com8]

pretty sure the army used water injection in their tanks and planes in ww2.
mechanic recons it works well although you
need a good set up which he says is just over a grand .(with computer mods ect .
there were kits out there but most are apparently crap!..with small gains.

must reserch!!

[VH commodore]

i have no idea how water injection works...last i heard water in the engine is bad...sorry for being noob lol

[immortality]

pretty sure the army used water injection in their tanks and planes in ww2.
mechanic recons it works well although you
need a good set up which he says is just over a grand .(with computer mods ect .
there were kits out there but most are apparently crap!..with small gains.

must reserch!!

yes, they used water injection in WWII fighters. it was forgotten about after the war but has become more popular in recent times and from waht i've read about it, it definitly does work, in fact one guy questioned why it wasn't fitted as standard from the factory, i guess the manufactureres don't want there engines to last forever

[VrWagz1]

I was of the understanding that water injection was mostly an injector in the inlet manifold, and as its sucked in heated and compressed in the cylinders with the air and fuel it splits and burns, thus giving a very small power boost as hydrogen and oxygen are much more flamable than petrol and cleans your engine slightly and helps to rust your exhaust a bit quicker.

[jules]

-just wondering how water injection works
-how much power gain there is
-and how to set it up

any info would be great

water injection cools the intake charge and helps avoid detonation. it doesn't raise compression itself, but allows the engine to run higher boost or engine compression ratio (which normally means skimming the head).

[DannyboyDS]

I was of the understanding that water injection was mostly an injector in the inlet manifold, and as its sucked in heated and compressed in the cylinders with the air and fuel it splits and burns, thus giving a very small power boost as hydrogen and oxygen are much more flamable than petrol and cleans your engine slightly and helps to rust your exhaust a bit quicker.

a tiny bit of steam should be comming out of the exhaust anyway its normal for moderns engines, not to mention that the exhaust after a long drive is generally hot enough to evaporate it away, this is why cars that do allot of short trips and very few and far between long trips tend to end up with rusty exhausts, at least thats what we were told when my dads AU ended up with a rusty exhaust.

[eaton v8]

has any one used a succesful system?? what name was it

[Bz Kn33z]

hey guys, i just got a SC-14 CRS kit on my car and the previous owner of the supercharger had water injection but hooked up to the inlet of the charger so it sprays into the charger, somehow i dont think thats good, could i get a plug up near the T/B about 3inch away from it and hook up a mister in there would that help? and hook it up the a washer bottle, i was also thinking of having a micro switch around the other side of the T/B so when its at full revs it will put the mist into the T/B is this a good idea, i'm abit iffy about the set-up i dont want to stuff anything up, and would there be gains to be made by doing this, i'm only running 3psi any info is great cheers

[kniever]

from what ive read the washer bottle is a handy idea for the water but it runs out too kwik, ive seen a few peaople use a bigger container in the boot so they dont have to fill it as often

[Pub247]

3psi i doubt there's any need for it. The only good thing about being on the intake of the charger is it should drop inlet temps by a fair whack better thanhaving it in you manifolrd tb area. As to whether its good for the charger i don't know. But they are a sealed unit so i don't think there's much chance of it getting into bearing which would eb the main worry

[sircruisealotVS]

a tiny bit of steam should be comming out of the exhaust anyway its normal for moderns engines, not to mention that the exhaust after a long drive is generally hot enough to evaporate it away, this is why cars that do allot of short trips and very few and far between long trips tend to end up with rusty exhausts, at least thats what we were told when my dads AU ended up with a rusty exhaust.

thats true - i dont think many people even realise that the cat will convert hydrocarbons into water and carbon dioxide. so water in the exhaust is extremely normal - as you said though, its that damn hot that it evaporates almost instantly, after all the cat operates at a few hundred degrees.

[daron]

ya wont get mist / fog spray from a jet thats into a washer bottle
ya have to get the proper pump and nozzle to make it into a fog then it cools down the washer bottle just doesnt have enough presseur to pump and atomise any liquid

also without a checkvalve youll find your water will be sucked out into motor even at idle cause vacum will draw the water up

at 3psi it wont make any diference
water injection doesnt give power it only cools to stop pinging
i run methanol/water

[Bz Kn33z]

i have something simular to what you have its the size of a coke can and pumps water really far but making it into a mist with alot of pressure may make the pump die lol, thanx for the info guys.

[Bz Kn33z]

i have something simular to what you have its the size of a coke can and pumps water really far but making it into a mist with alot of pressure may make the pump die lol, thanx for the info guys.

[MR_VX]

just wondering if the capa water injection kit is worth buying for my vx raptor supercharger set up?

[eaton v8]

how much are they i got my kit off [cooling mist ] ebay usa. cooling mist sell them on there it was 300 to my door i think i would have to check

[MR_VX]

i brough a brand new capa kit off ebay yesterday for $200 normaly $475 plus

[Cheap6]

yes, they used water injection in WWII fighters. it was forgotten about after the war but has become more popular in recent times and from waht i've read about it, it definitly does work, in fact one guy questioned why it wasn't fitted as standard from the factory, i guess the manufactureres don't want there engines to last forever

Didn't SAAB and even before that Chevrolet on the Corvair fit water injection? I think the issue would have been owner's neglecting to fill the system and killing a motor tuned with it working.

hey guys, i just got a SC-14 CRS kit on my car and the previous owner of the supercharger had water injection but hooked up to the inlet of the charger so it sprays into the charger, somehow i dont think thats good, could i get a plug up near the T/B about 3inch away from it and hook up a mister in there would that help? and hook it up the a washer bottle, i was also thinking of having a micro switch around the other side of the T/B so when its at full revs it will put the mist into the T/B is this a good idea, i'm abit iffy about the set-up i dont want to stuff anything up, and would there be gains to be made by doing this, i'm only running 3psi any info is great cheers

The received wisdom is that with a (low speed) positive displacement blower the water can help tto seal between the rotor(s) and the case, lifting blower efficiency and upping boost a little. Not so good on a centrifugal blower where the high rotor speed has been known to result in effects akin to a water cutting jet.

Julian Edgar on Autospeed (and in a few hard copy publications) has written a lot on water injection, which may be worth look. Water/methanol injection is pretty popular with the turbo buick Regal/GN boys and girls in the states too - that will be worth a search, as would "Aquamist".