We have never sprayed fog into a dry intake, just wet intakes like carbed motors. Thats the way Mercury taught us to do it so thats the way its been done for years. Dry intake meaning anything with fuel injectors in the intake runners, wet meaning anything with a throttle body or carb. Everybody does it different so I cant say if he'swrong or right. You'll get hundreds of different responces on whats right or wrong.Good luck.