[KingLT1]

Imo there is no need to use Meth for cooling if you are ONLY running E85 and not going back and fort between pump and E. E85 has the same chemical intercooling effect in the combustion chamber. Actually it's more effective being directly sprayed into the chamber vs meth being sprayed ahead of the throttle body.

All you need to do is adjust your IAT vs spark retard table to not pull timing until 175-180 on E. If you could log EGT's you would understand what I am saying better. All spraying Meth upstream of the IAT sensor is making you think temps are cooler when in fact cylinder temps will not be that much different on E vs Meth and E85. If you had no control over IAT spark retard in the tune then yes it would be beneficial to spray meth to maintain timing regardless of fuel used.

I know guys running C85 or M1 that do not run intercoolers, pushing 25 psi, hitting 200 degree IAT and they don't pull timing. And the reason is the IAT really doesn't matter. Cylinder temps and EGT's are what matter.

If you are running a good amount of E, there is no reason to pull timing until around 180 on a forged engine. I don't even pull any timing on my SBE until 154 and even then it's only -1 degree.

All that said, if you plan on bouncing back and forth between pump gas and E85, then it would be a good idea to have the meth system in place and keep the IAT spark retard table conservative if you plan on making WOT pulls on pump gas.