Why aren't miata engines so good for all-motor power?
#28
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#35
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Port a head and stick it on a Dyno. That's what Andrew, myself and a few others have done for the last decade or so. Bowl blending doesn't mean port shaping in my view. That's just correcting for low cost manufacturing processes. Filling in the short side radius time-tested approach to low port angle heads. In another life, we did that to 2.0L Pinto heads.
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#39
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Rounding out the flat roof from the injector pocket through to the bowl looks to me like one way to achieve the appropriate change in cross section through the length of the port.
Even with filling the floor as an option I didn't see the shape up top as being good. It doesn't look like it has an appropriate change in cross section through the length of the port.
Last edited by burdickjp; 10-08-2018 at 04:00 PM.