Intake manifold air flow quality

[Bara]

Would anyone have any test data on the flow quality through the 90/05 style intake manifolds? Data on any year would be welcome.

I'd also appreciate any thoughts on the quality of the Mazda design.

[modok]

It might help if you put the engine in question in the title.

I THINK you mean mazda B engines, but not really sure, whats 90/05 mean?

[mag2555]

You can likely answer a good portion of your questions yourself.
If you have the head and Intake from the motor in your post then get a set of expanding inside snap gauges and a cheap plastic dial caliper.
Take yourself some size measurements of the heads runner every 3/4" in along and do the same for the Manifold runners and you should get a good picture of where the choke points are.

A basic rule of Thumb is that any of the Manifold runners that have any line of sight going on with the heads ports will have a good amount more Intake flow taking place then others that do not have such!

[Kevin Johnson]

Would anyone have any test data on the flow quality through the 90/05 style intake manifolds? Data on any year would be welcome.

I'd also appreciate any thoughts on the quality of the Mazda design.

https://www.flyinmiata.com/skunk2-ultra ... ifold.html

From the dyno charts you might be able to infer the level of the OEM design. As others have mentioned, you need to be more specific.