Quote: This has been a subject of other posts on here but I am working on a w9 port design that right now flows upwards of [Email]445@.850"[/Email] and very near [Email]470@1.00.[/Email] Velocity down the port is near 325-335 and about 260ish through the throat....port volume around 300cc....still a work in process...
when you stated this,,,,, and then saying 95-96% throat respective to valve size,,, though you never said what your valve size cause its top secret,, but assuming 2.250-2.300,, implys an mca of 2.8-3.0
Not following your math....if you are figuring the throat as the MCA then assuming a 2.25 valve its area would be 3.974...with a 95% throat the gross area would be 3.775 less valve stem area of .0923(assuming an 11/32 valve) for a net area at the throat of 3.683....if you are figuring the MCA to be elsewhere down the port it could be any size irrespective of these dimensions.....working backward.....with a flow of 450 and an MCA of 3.00 calculated velocity would be 357fps....
