Porting Program

[surferdude345]

I got bored in one of my classes today and found this it looks pretty cool and is cheap enough anyone ever use it http://www.porting-programs.com/ It looks like you can print ports to size to port from off it.

 

[softport]

Hi, the program will only print out the exhaust port.
It's handy for calculating transfer and boost port heights
if you already know the exhaust duration and blowdown you
want. It does not yet have provisions for a piston ported
intake.

The second program, portmap analyzer, calculates time areas
from a scanned portmap. You can even add your own ports
by drawing them in, but this one also does not handle a piston
ported intake.

I've been working on these on off since I got hooked on
2 stroke porting a few years ago. I'm no porting expert,
I just put the math into these programs. The first program
started off based on Bell's info for port durations vs rpm,
the second to help with collecting time area info and use
with Jennings' book.

Both programs are constantly being added to, whenever I
have the time. If you have any suggestions I can add them
to the programs if possible.

 

[#ZERO]

This is an engine specific program and not designed for the Yamaha 61X or 62T engine.

I purchased version 3.2 a while ago and it would be nice if the duration graph didn't start at 7000 rpm.

Also not all the parameter windows are adjustable causing this program to be a waist of 15 bucks IMO.

 

[softport]

Here's one I just finished. The rpm range goes down to
1k. It's a step closer, but still needs inputs for a piston
ported intake. I checked all the engine parameter inputs,
in case there was a glitch, and they can be changed.

http://www.mediafire.com/?yytldtjglnu

A couple of things that the help file hasn't been updated
with:

BMEP can be changed to BAR, and HP to KW.
I added a graph cursor at 150 degrees. Clicking the main cursor
above 150 degrees sets the exhaust port duration, below 150
degrees it sets the main tranfer duration.

 

[Prem1x]

Almost no-one on this board is going to care about piston-port intakes. Everything is reed-induction through the crankcase (maybe some rotary-valve but not much).

 

[softport]

Thanks Prem1x.

 

[waxhead]

its done that way because it was designed around the mineralli scooter engine
I have a copy of this software it quite handy

 

[softport]

Well, I have some updates .

Not sure this is the correct place to post them, there is a "stuff for sale"
section, but that looks like for individual members. Let me know if this is pushing the toss.

I've added more ports to the cad section of the porting
calculator. You can now set the port areas for exhaust, main and
aux tranfers, and boost. It will handle a single exhaust port, and
single boost port. Each port has it's own controls, or you can
drag the port's cursors to adjust width, horizontal position, and the
vertical position of the port's bottom edge.

The portmap analyzer program now calculates total mean areas, angle
areas and time areas.

Website link, with more info is in the first post.

thanks!

PS If you purchased any of the programs before, and would like to
try both new versions, send a pm. I can put the files up somewhere for
download.

 

[#ZERO]

I'm glad you're giving all those programs away for free but it would be nice if the duration graph would show up below 7000 rpm on the porting calculator.

 

[softport]

Hi, that's been taken care of now. There is an rpm scroll, on the bottom
right of graph, which will let you go down to 1k.

regards,

Walter