Water Methanol Injecton

I have now been using water methanol injection for SP over the last one year and I must say I am enjoying it and glad that I decided to install it. There are many benefits of running water injection, and below is the explanation from Coolingmist themselves:

"Water injection, alcohol injection, water methanol injection or methanol injection are all the same thing. The only difference is the fluid you are injecting. Having a chemical intercooler or water injection, methanol injection or alcohol injection will cool the combustion temperature of your engine by cooling your charge. A super fine mist of methanol, water or alcohol combination will evaporate and soak up the heat. This cools your temperatures and raises the effective octane of your fuel. In most cases you will not need to run race fuel and pump gas will be fine. A water injection pump...methanol injection pump or alcohol injection pump is very important. The higher pressure your pump, the better that atomization will be in your water methanol injection system. "

As SP is running a very high compression ratio, it is necessary to find ways to minimize knock and increase ignition timing which are really the key to making power in NA engines. The results of water injection in a turbo charged engined is much greater than NA engines. Nevertheless, I am also interested in the other benefit of water injection, which is a much cleaner engine as well, as it also helps to steam clean the internals, especially those in the combustion chamber.

The kit that I am using is from Coolingmist who my bro Jack, has been using in his previous ride with good performance and reliability. The trunkmount kit comes with the standard 100PSI pump, 1 gallon water tank, piping, injector and mounting hardware. I opted to have the stainless steel braided lines and as well as ordered water injection controller called the Vari-Cool. This controller lets me vary the activation point and also a min and max setpoint, plus the allowance to control the amount of flow into the engine. This allows me to fine tune the water injection flow rate and also have a 50% flow during part throttle application if required. Currently for SP the activation is set using the TPS position. The TPS provides a 0-5v signal, which is then fed to the Vari-Cool controller, and from this we can set at which TPS position the water injection will activate. For example, at 50% TPS or less no water injection, from 50-80% TPS, injection at 50% of flow rate, and at 100%TPS full flow is provided.

This allows me to vary the usage of the water injection depending on how and where I am driving the car. I can also go one step higher by having this 3D mapped by my ECU like my fuel and ignition maps, but didnt want the added complications. I am currently using a 50/50 mix between water and methanol. Havent tried running full methanol although the system and engine is fully capable of this.

I have since changed to the larger pump by Coolingmist which produces 200-250 PSI pressure and also the Coolingmist Super Atomizing Injector for more flow and better atomisation. The higher the pressure, the finer the atomization of the water methanol mixture and provides more heat absorbing capacity. I have also added a LED on the dash to indicate when the pump is operating and this also provides indication if there is problem with the system. So far I am enjoying this mod and also have been stocking up on methanol :)

Enjoy the pictures.

The water tank complete with the pump. This is the earlier version 100psi pump

Another view of the tank and pump assembly

Closeup of the 100 psi pump

The optional stainless steel braided hose along with steel fittings (not shown)

The Vari-Cool controller. Takes in either a pressure (boost) or 0-5v input signal. Green knob is for the lower limit setting (start 50% flow) and red knob for the higher limit setting (start 100% flow).

The mounting hardware

The Vari-Cool controller installed where the radio used to be. Below it is my knock sensor

Tank and pump installed in the boot

I didnt want to drill the boot so a custom mounting tray was fabricated from Aluminium

All installed