[rotrex]

depending on boost and usage, i'd go direct port and locate the nozzles a few cm behind the fun injectors. Any turns will cause the bigger droplets to hit the pipe walls. It will still work, but the fluid will be less effective, i.e. you need more flow for the same knock suppression effect.
To make things more complicated, the methanol will still do its thing even as a puddled stream of fluid along the pipe wall as it still will 100% vaporise in the combustion chamber and burn as high octane fuel. The water as the stream will to a large degree be expelled by the exhaust in liquid form. This is IMHO the reason why many folks find that spraying higher methanol concentration mixes ultimately gets them more power. Much of the water is steaming along the wall and does very little for the combustion process.