Devilsown Methanol Alcohol Water Injection - View Single Post

Terry Syd · 05-15-2008

Dust, this is why I would like to see a dyno run of the M1/M2 configuration against the M2/M1 configuration.

The water going through the turbo drops the temperature so that the air is closer to ambient temperature as it comes out of the turbo. This decreases the work that the turbo has to do and opens the wastegate. It can also eliminate the need for an intercooler. This should be a more effective use of the water than putting it in the cylinder (unless we have high egts, then we have to dump in a lot of water)

We don't have any figures yet for the amount of water that can be put through a turbo. Perhaps in the future we may have some formula that relates to displacement and boost pressure. A formula would allow us to increase the flow into the turbo without causing an excess of water. An excess of water may accelerate compressor wheel erosion. It would be desireable to find the 'just right' flow for a given engine.

Having said that, if I swap the M2 to the pre-turbo position that will increase my water flow through the compressor by 100%. That is a significant increase of water and still allows me to keep the very fine water droplets. Perhaps it may exceed the 'just right' flow, however keeping the droplets very fine would mitigate erosion problems.

I will have to find the 'volume of a sphere' formula. There is a considerable increase in mass when the diameter of the droplet is increased.

I also think a small amount of methanol in the water is desireable for the pre-turbo nozzle installation. The addition of just a small amount (10%) will help to decrease the surface tension of the water. This may help to break up the droplets so that there is less tendancy for erosion.

05-15-2008	#18 (permalink)
Terry Syd Alcohol Holic Join Date: Nov 2007 Posts: 107	Re: Pre turbo nozzle placement Dust, this is why I would like to see a dyno run of the M1/M2 configuration against the M2/M1 configuration. The water going through the turbo drops the temperature so that the air is closer to ambient temperature as it comes out of the turbo. This decreases the work that the turbo has to do and opens the wastegate. It can also eliminate the need for an intercooler. This should be a more effective use of the water than putting it in the cylinder (unless we have high egts, then we have to dump in a lot of water) We don't have any figures yet for the amount of water that can be put through a turbo. Perhaps in the future we may have some formula that relates to displacement and boost pressure. A formula would allow us to increase the flow into the turbo without causing an excess of water. An excess of water may accelerate compressor wheel erosion. It would be desireable to find the 'just right' flow for a given engine. Having said that, if I swap the M2 to the pre-turbo position that will increase my water flow through the compressor by 100%. That is a significant increase of water and still allows me to keep the very fine water droplets. Perhaps it may exceed the 'just right' flow, however keeping the droplets very fine would mitigate erosion problems. I will have to find the 'volume of a sphere' formula. There is a considerable increase in mass when the diameter of the droplet is increased. I also think a small amount of methanol in the water is desireable for the pre-turbo nozzle installation. The addition of just a small amount (10%) will help to decrease the surface tension of the water. This may help to break up the droplets so that there is less tendancy for erosion.