Most WI manufacturers recommend the ideal position for the nozzle is at the throttle plate instead at the exit of the intercooler. I beg to differ and the reasons are:
(TMIC doesn't have much a choice, but the discussion is mainly in general and for FMIC)
1. The further way the drops have to travel along the inlet tract befoe entering the cylinders the better. This allows more time for the drop to perform intercooling work.
2. As the droplet evaporates, the size will reduce - the fundamental process of the evaporation.
3. Smaller droplet size will improve even distribution of each cyclinder receiving the droplets.
4. At the TB, the droplets are more likely to hit the throttle plate and pool along the surface and reforming to larger droplets, overfill the first cylinder.