is there a particular temperature inside the intake where you start loosing power? My roots deal is is seeing temps maxing so far at 205*
water meth system is in the bucket list,but I would like to maximize what I have before any changes or additions.
Right now I use stock iron heads with a good valve job.

I don't know if there's a certain max temperature. However I do know that the efficiency range on some blowers is such that if you boost past a certain psi level or spin the rotors past a certain rpm, efficiency drops like a stone and temps skyrocket. Some of those are such that you are better off, or at least no worse off hp wise, by slowing the blower and doing less boost.

I would be super interested to see someone do some before and after dyno runs with a blown setup with and without alcohol injection to have quantifiable results showing alcohol injection flow in relation to fuel flow, as well as before/after intake temps and hp levels.

I am curious what your intake temps will do once you get the exhaust opened up.

I run a Snow water / alcohol system on my Pro-Charger blow through system. Besides the kit coming with 3 nozzle sizes, it has 2 adjustable pots on the controller to control when the water pump turns on and max water pump output at max boost ( I think it goes to 19 psi. ) I have no idea how accurate it is, but it does give you some adjustment. I have the pump turn on at 5 psi and max flow at 19 psi and I use the middle size nozzle. I think there is some "starting point" info in their literature. It's still a guess, and if you guess wrong, bad things can happen.

How do you momitor a W/M system

is there a particular temperature inside the intake where you start loosing power?

Below ambient, if you can get it.