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Discussion Starter #1
Is the d16y8 intake manifold, with its larger plenum volume, better suited to a boosted application than a d16z6 intake manifold?

The only argument against that I can find is that the differing runner lengths can result is slight differences in each cylinders A/F when all injectors run the same duty. I think this would only be a problem for N/A. If you are running 20+ psi of boost on a good size turbo that pressurized air is seeking ANY path of least resistance the moment any particular intake valve opens.

Would like to hear from someone who had a boosted z6 intake and went to y8 ideally.
 

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Classic Man
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Inefficiencies in an NA application are magnified in a boosted application.

With that being said, the best way to find out would be back to back test them.

I've used both and had acceptable results.
 
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