Still looking for the best setup for my 2.0 Zetec before I put it in the Ka. Now I was wondering what the dis-/advantages are for a plenum on a non turbod engine?

This would look great:


...and it will help me get the cold air to the inlet instead of feeding it over the hot engine before. Also saves a bit of room at the top of the engine bay so I could still use the strutbrace.

Ive seen a lot of those plenums on turbod cars but IRCC its nothing more than an aircollector between trottlebody and the inlet. On the racing Puma there is used one which helps the midrange revs. produce more power.

Seen a few DIY job which look pretty easy to do: