Originally Posted by
tabetha
It's nothing to do with more room for more air, the train of thought is that the inlet trumpets in the plenum are so close to the cover that they get a shrouding effect, moving them away by means of spacing is thought to overcome this.
More air does not mean more flow.
tabetha
well thats what a engine builder told me when i was thinking of geting a hart inlet manifold said i did not need it and that was why