Water/Methanol mix and AFR's
 

What affect if any does adding methanol make to the AFR :?:

Depending on the quantity injected, ratio to fuel.

Methanol has a stoichonetric of ~6.6 amnd gasoline ~14.7 you need to injection 2.5 times to replace fuel mass..

So in simple terms :? running say 50% water and Methanol against water alone will bring the AFR's down (running richer)

Yes, the alcohol is extra fuel so you will run richer if you don`t trim the fuel injector delivery. I`d say 5000cc/min of 50w50m wouldn`t have much effect on the AFR, I only had tro start relly trimming fuel out when running 1.2l/min of 25w75m mixture.

You`d have to trim 100cc/min of fuel to account for 500cc/min of a 50w50m mix.