I was curious of the same thing... I am running 16-17 psi right now, I have plans to go water/meth and 20psi, perhaps I am wasting my time and money without going to a larger turbo??? Has anyone else done a 57trim with water/meth? My AEM is set at 62% DC to get the 16-17psi, so I am assuming that with my setup I have room to make more boost, but as someone else mentioned, it does not mean I will net more HP/Torque with the extra 3psi of boost?
I Have had bad luck with anything over 14psi. i usually keep it at that or under.. they seem to wear very fast at higher psi.. I am basing this theory off of three turbo's.
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