Ported top end: Port Match or bolt it on...

[Schrade]

Originally Posted by LGAFF

*Again important to define port matching:

*port matching to 36mm
*port matching to 31.5mm=33mm(with bevell), which means a much smaller runner tapering from 36-31mm

Understood.

(neither of these is "bolt it on...", as you refer in the title - right?

Originally Posted by XfireZ51

OTOH Chuck you could end up w reversion causing fuel
to drop out of suspension and a loss of velocity. I think about the flaps on the wing of a plane. What happens when it is lowered into the airflow?
So would I port IH and Plenum while not port matching the heads? Sure. Still worth some power. Does it flow better than port matching? You'll need to prove that to me.

Fuel dropping out of suspension [vaporization]? I can't see how that could happen, with gasoline vapor pressure (tendency to go from liquid phase, to gaseous phase) as high as it already is. Although of course, it's possible - but it seems IMprobable to me here...

I'm not sure I'm seeing the aileron application here Dom. Lower the flaps, and the NET effect is lift - higher pressure. The lowered flaps BLOCK flow, sort of, when lowered, depending of course on degree of lowering. And higher pressure retards vaporization.

I think with angled furrows, or channels, cut into the 32mm opening, you'd get some spots of LOWER pressure in some spots, as well as higher pressure spots (created by the flaps). And LOWER pressure INCREASES vapor pressure.

...and these angled channels would induce a SINGLE vortical flow...............