With a proper install, I don't see any big downsides to water/meth install. My shop talked to ESS about it, and they said many cars with this kit run water/meth and that it doesn't need a special tune for it since the computer will adapt. I'm going to ignore the fact that fr8dog lost a lot of power up top with his install because it was very cold when he did it and I don't know if his ECU had time to adjust.
I should have the car back by the weekend with the kit installed, plus running 1-2 more psi with my leak hopefully fixed. Then I'll drive the balls out of it for 300 miles for it to adapt, and hit the dyno. If it'll need tuning, I'll take the appropriate steps
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