Originally posted by morbid: I grabbed that pic from a past discussion, similar to this one , about 1.5 years ago. I think TH chimed in then about the plenum capacity of the original Porsche UIM being optimal for the combustion chamber volume... then Ford cut it to 1/2 its size. During that discussion, it was said that Ford did it to reduce performance and thus reduce temps as the original design ran hotter than our current models.
Perhaps the easiest modification to the UIM would be to cut off the long edge of each plenum... weld on a 2-3 inch extention then weld the edge back on. Of course there would now be rough material inside the plenums, but a cycle through extrudehone would help with that.
Is that correct TH-channeled-CEG'r?
That sounds like a novel idea, but I have no idea if the affects will be effective enough to warrant the costs...(is that right? Affect/effect) Anyways...log style intake manifolds are ideal for boosted applications, but on an NA motor it tends to kill airflow. That is just my limited understanding. I will email terry later today.
