Originally posted by warmonger:
Well, I"m not going to assign any numbers to it because I wouldn't know that without thorough testing. However, the cross sectional area of the SVT split ports, with the area of both ports added together, is significantly more than the cross sectional area of the oval port by itself.
Then if you add to it the fact that you can overbore it more if you wish and it will still retain structural integrity since it is aluminum, I think it makes it superior.
For NA motors this isn't necessarily what you are after, but for a turbo motor like his, the stock SVT split port can definitely flow more than the stock oval port if you base the comparison on constant pressure and square area of the ports. They aren't just a little bigger, they have like 20-30% more cross-sectional area.
Which one has more interior surface area?
Does high boost on a dual plane manifold with no secondaries do anything between the two sets of runners?
How do these factors affect air velocity?
Ideally, one would just create a single oval chamber above the "V" and have short runners to the heads. That is the best thing for forced induction. You just need to make sure the injectors fit, too. The plastic oval intake is the closest thing to that configuration.
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