1968 Coupe with a 302....best looking car and easiest maintenance EVER!
.....till you need parts.

1968 Coupe with a 302....best looking car and easiest maintenance EVER!

The 4.6 likes boost because of its low compression and its hatred to make naturally aspirated power, lol.
....joking aside, the compression between the two is actually about the same. The 4.6L SOHC is much more volumetrically efficient that the old 5.0L OHV was. The 4.6L engine has only 281ci to fill, where the 5.0L has to fill 302ci. Right off the bat, when you get two identical blowers spinning at the exact same RPM, the 4.6L has an easier time filling the smaller cylinders by comparison. Combine that with the fact that the aluminum heads (which will allow more timing because of their ability to more quickly remove heat from the combustion chamber) on the PI 4.6L are head over heels better flowing, with a more efficient combustion design than the old E7TE iron castings on the earlier OHV engines (PI castings actually rival some of the aftermarket 302 heads) and you'll see why they respond so well to forced induction.