water injection

[stevenoreaga215]

i seen two honda with water injection has anyone use this setup if so did it make a differents in performance?

[deevergote]

Do you know what water injection does?

[JohnD1079]

Do you know what water injection does?

I dont, and i would like to know. LOL. I havent reaserched on it though, so i deserve not to know

[ExplodingCake]

I heard water injection from certain airplanes. Like the P47 Thunderbolt

[ExplodingCake]

"Water injection is a method for cooling the combustion chambers of engines by adding water to the incoming fuel-air mixture, allowing for greater compression ratios and largely eliminating the problem of engine knocking. This effectively increases the octane rating of the fuel, meaning that performance gains can be obtained when used in conjunction with a supercharger or turbocharger, altered spark ignition timing, and other modifications. Many water injection systems use a mixture of water and alcohol (usually 50/50), partly because the alcohol is combustible, while water is not; in addition, the alcohol serves as an antifreeze for the water. Hence, water injection is also often known as methanol-water injection, owing to the fact that the alcohol mixed into the injection solution is often methanol, CH3OH.

Due to its corrosive nature, the alcohol in water injection systems cannot be ethanol. Only methanol and isopropanol are used, methanol being the more commonly-utilised form of alcohol for this purpose due to its higher availability and lower cost than isopropanol.

Water injection is often necessary when adding forced induction to an engine that was not designed for it; the compression ratio of a normally-aspirated engine is too high to cope with more than a very modest boost unless this technique is used.

The system was first used extensively on World War II fighter aircraft to increase power upon takeoff and bring up the service ceiling. A limited number of road vehicles with large-displacement engines from manufacturers such as Chrysler have also included water injection. Saab offered water injection for the Saab 99 Turbo. With the introduction of the intercooler the interest in water injection disappeared, but today, water injection is also of interest because it can potentially decrease nitrogen oxide (NOx) emissions in exhaust. Water injection is primarily used with piston-powered internal combustion engines, but it has also seen use with turbines.

The initial injection of water cools the fuel-air mixture somewhat, which increases its density and hence the amount of mixture that enters the cylinder. But the greater effect comes later during combustion when the water takes in significant amounts of heat energy as it converts from liquid to gas (steam), increasing piston pressure (torque) and reducing the peak temperature with its resultant NOx formation as well as the amount of energy absorbed into the cylinder walls. The duration of combustion is said to be longer. An interesting side effect that has been reported by some is that water injection effectively "steam cleans" the engine interior, resulting in less carbon residue buildup. Glowing hot carbon deposits are a known cause of knocking.

Fuel economy can be improved with water injection, although the effect on most engines with no other modification, like leaning out the mixture, appears to be rather limited or even negligible in some cases.

Some degree of control over the water injection is important. It needs to be injected only when the engine is heavily loaded and the throttle is wide open; as with other systems which need to monitor engine load, this can be determined by manifold vacuum, which is low when the engine is loaded and high when it is unloaded; however, provision must be made for starting, when the manifold vacuum is also low but water injection is undesirable.

Reports of more rapid corrosion of the steel and cast iron components of engines to which water injection has been added suggest that more frequent oil changes, particularly when the engine does not experience sustained high temperature operation to evaporate any water from the oil, are prudent" - Wikipedia

[F22HB]

Isn't it supposed to me methanol injection for turbo cars because methanol burns slow and is VERY cold.

[deevergote]

Water injection is used to prevent detonation. It's commonly used in high boost turbo motors. It can get tricky, because the water has to be atomized by the injector properly, so it vaporizes in the heat of the combustion chamber. If it remains liquid, it could do serious damage to the motor. Many idiots have attempted to use non-atomizing nozzles (like windshield washers... ) and damaged their motors.


It's more of an advanced type setup... and I don't think there's a single person on here that has ever needed to use it. Whether or not someone HAS used it, I don't know...


http://www.aquamist.co.uk/
Aquamist is probably the most well-known company for water injection systems.

[10thcb7]

Id use another type of solution. I think E85 might not corroed as much. or just anything that can safely prolong engine life. I wouldnt use the injection to make MORE power rather keep the temps lower during hot days.

[deevergote]

E85 is plenty corrosive. Run what the system was designed for, if you ever run such a system at all. Really, the only way to make use of it would be for someone who wants to run higher boost on a stock Honda block... even then, it'd be smarter to just build the block. Water injection can be used later on to get peak power... but again, it's FWD... why?

[NAiL05]

1. E85 will eat up seals but it will do it at a slow rate its not instantaneous.
2. Your car will smell like french fries.
3. Water injection and Methanol injection both are used in FI applications. The reason why they are so effective is they raise the octane rating allowing more power to be made. My friend runs methanol injection on his boosted gs.
4. Your not gonna see much help running methanol injection or water on an NA motor it wont be big enough to care about. You might as well run nitrous and call it a day.

[h22sparkle]

i seen two honda with water injection has anyone use this setup if so did it make a differents in performance?

I may decide to use A water injection kit myself from the devils own. Im gettin the alcohol one from devils own to mix in with the tank so i can run high octane mode all the time on my car. Instead of just going out and copin a can from my local race shop all the time. When i use High octane mode it advances my timing and allows for more power on my car and more torque and less pinging and knock. The difference is night and day with that car.