I noticed a decent increase. Also, using windshield washer fluid has water and alcohol, so the alcohol is being burned as is just like adding more fuel. I don't know if you would really need it if you already have an intercooler, I'm still all hot air! If you were pushing lots of boost, I think it would help out as the intercooler can only do so much, but at 10 to 15lbs of boost I cant say for sure if it would help on top of the intercooler thats already there. The orfice I have is pretty small and it sprays the water in directly at the turbine wheel. That chops it up even more, I don't think it would collect at the bottom of your intercooler but who knows. It should be in water vapor form untill it gets into the engine, it turns to steam during combustion.
Jason
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