Alcohol Misters??? Can't find info.
05-13-2005, 12:33 PM
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Alcohol Misters??? Can't find info.
Being new to the car world, someone mentioned Alcohol misters to me. I was confused on what they are, so I searched around this forum. While I found it mentioned quite a few times, I never really learned:
1. What exactly does this do?
2. Are they effective?
3. Are they safe?
1. What exactly does this do?
2. Are they effective?
3. Are they safe?
05-13-2005, 01:53 PM
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it's either misting into the engine or on the face of the intercoolers
MarkP has aquamist water injection installed. Search for his name on here for a link to his website.
Spraying a mist of water onto the intercoolers will make them more efficient, but won't do near as much as injecting water into the engine. I'm pretty sure subaru Sti's have the IC sprayer setup from the factory. It's either that or the evo's.
I'm doing some research to get water injection (WI) installed before this summer. WI isn't snake oil. The military used it on old WWII planes to gain up to 250 hp. Buick grand nationals have lights and fuse slots marked for WI but the system wasn't brought to production. Saab sold high boost widebody 900 turbo "enduro" models in 1984 with factory WI.
All WI does is cool things down enough to prevent knocking. If you use WI with stock boost levels I'll bet you'd lose power. It only allows more power when your timing or boost are to the point where they're being limited by knocking. The water lets you run more boost or advanced timing by preventing knocking. With that in mind, you want the WI to activate at a boost level slightly below where the knocking starts.
Another little known benefit of WI is steam cleaning the carbon build up out of the engine. From what I've read, carbon buildup can cause hotspots in the engine which can lead to knocking.
I'm deciding between aquamist kit or piecing my own kit together using a pressure regulator. A pressure regulator setup (similar to the fuel rail) would allow the use of a low-tech pump and controller.
I *think* I need two nozzles flowing a total of around 400cc/min of water. The nozzle size (0.8mm dia) used on aquamist seems to flow more than that. I assume the nozzles are not just smooth drilled holes. They need something in there to create a fine mist pattern. If true, that reduces the flowrate from what's calculated assuming a smooth hole.
If you're still reading.. feel free to add info!
Spraying a mist of water onto the intercoolers will make them more efficient, but won't do near as much as injecting water into the engine. I'm pretty sure subaru Sti's have the IC sprayer setup from the factory. It's either that or the evo's.
I'm doing some research to get water injection (WI) installed before this summer. WI isn't snake oil. The military used it on old WWII planes to gain up to 250 hp. Buick grand nationals have lights and fuse slots marked for WI but the system wasn't brought to production. Saab sold high boost widebody 900 turbo "enduro" models in 1984 with factory WI.
All WI does is cool things down enough to prevent knocking. If you use WI with stock boost levels I'll bet you'd lose power. It only allows more power when your timing or boost are to the point where they're being limited by knocking. The water lets you run more boost or advanced timing by preventing knocking. With that in mind, you want the WI to activate at a boost level slightly below where the knocking starts.
Another little known benefit of WI is steam cleaning the carbon build up out of the engine. From what I've read, carbon buildup can cause hotspots in the engine which can lead to knocking.
I'm deciding between aquamist kit or piecing my own kit together using a pressure regulator. A pressure regulator setup (similar to the fuel rail) would allow the use of a low-tech pump and controller.
I *think* I need two nozzles flowing a total of around 400cc/min of water. The nozzle size (0.8mm dia) used on aquamist seems to flow more than that. I assume the nozzles are not just smooth drilled holes. They need something in there to create a fine mist pattern. If true, that reduces the flowrate from what's calculated assuming a smooth hole.
If you're still reading.. feel free to add info!
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