Author Topic: port mapping (easy way)  (Read 1519 times)

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Offline 1manband

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Re: port mapping (easy way)
« Reply #30 on: December 13, 2015, 10:43:26 am »
You have done alot of work in this thread.  I appreciate the time you put into it. 

I still rationalize this work the old way, non duration measurement style.   

my goal is not to change the way anyone does things, just to present things that i currently have an interest in.  different way to skin the cat is all.

for me, I look at using time*areas as giving me a clearer idea of what is going on.

Couple quick examples to illustrate this:

Take two ports, one of them being exhaust, other being intake, both being equal in port window area.  Say the exhaust port open duration is 160 degrees, the intake duration being less at 155 degrees.
When using time*areas, you would be able to see that the 155 intake port, has about 30% more exposed open port area, than the 160 exhaust port with a 5 degree longer duration.

Another reason to would be to see blowdown a bit clearer.  Blowdown is more than degrees duration, it is also an area.  The area of the exhaust port exposed before the transfers just start to open.  When the exhaust port for just one example, is widened, the blowdown is changing, even though the degrees still remain at say, 17.

I could post some screenshot examples of these things if anyone is interested.

hiatus

 

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