Water injection an alternative to Vp Race fuel and Toulene
This system injects extremely fine drop let of water in the inlet tract. The intake temperature is lowered significantly and helps in reduction of knock. The water also removes carbon build up .
This system consist of a pump relays and boost pressure switches.
The picture aboves shows the water pump the pump and an accumulator used to ensure consistend water pressure. This is somewhat similar to the compressor tank used by air compressors.
The electrical side of the system is shown here.The boost switch passes power to the relay which starts the pump. It also open the water valve.
Here is anoher example of the electrical configuration.Toulene works well but it is a pain having to mix.The price is also now becoming rediculously high
This is the pump that will be supplying the water at a pressure of 100psi.This pump will be activated by a boost pressure switch.
These are the other parts required to complete the water injection setup. Included are relays,nozzles,solenoids etc>
Here is another diagram of the intended setup. I will look to put the relay,solenoid, and pressure switch on an aluminum base.The pump and the water tank will also be mounted on an aluminum base in the back of the car.
Installion is progressing. The pump nad water tank are mounted together on a slab of aluminum. A water filter is instlled between them. The aluminum plate will be bolted to a panel in t he back.
Up front is the water solenoid ,boost switch and relay.The boost switch is connected to the relay and water solenoid. Boost Pressure turns the water solenoid on and grounds the relay. Grounding the relay enable current to flow to the pump.
The activities remaining are attaching vacuum hose to boost switch.Connection the water jet.Which seems extremely difficult due to the design.
The system will be tested by taping the jet on the window screen and driving the car under boost and noting the point which the water injects and making the necessary adjustments.
After a few attempt driving under boost I was able to set the turn on point to 10psi. The jet was actually placed in the car and as 10psi approached a psssssst souind was heard. .
The jet is seen below and is more than 3 feet away from the throttle body. The jet was tapped into a piece of aluminum and then welded to the intake pipe.Plastic steel was then used to stop any leaks .
The complete system mounted. The red hose running along the intake pipe goes to the m2 water jet.The blue hose goes to the boost source to turn the boost switch on.The water solenoid is required to turn off the water as soon as possible after the pump stops and pressure starts to drop .
Here is a shot of the pump and the water tank mounted at the back of the starlet.I have notice a drop in EGTs of over 100F.
Inlet air temperature increase constantly after a hard driving. I guess this is were the term heat soak originates.After three run the temperature rose to 125f without water injection. With water injection the temperature drops to 109 degrees and lingers at this temperature for a while.It would also appear that the front mount intercooler works extremely will in keeping temperatures near to ambient.
The best drop in temperature has been experienced today the 10th of October. An Intake temperature of 89F/30c was recorded tonight .The thermometer indicated 28c ambient temperature. A mix of water and methanol was being used.Water Injections was set to cut in at 1 psi becuase the standard injectors were being used without engine management