Jim Irwin and Steve Muck

Intlwaters

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http://birdcagesoft.com/ go to the 2T exhaust calculator.
Tim run the # for a 45 pipe and see what you come up with.
Then compare to Scotts pipe sizes posted on the other tread.
Tell me what you see.
I have had a few of my own pipes made.
Scott made the cones and Tom welded them up.
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It is based off Blairs calculations in a easy to use format.
Same calculations Scott used.

I've got far better software than 2T.... and I have 2T.... I'm willing to discuss, in PM, what the issue is

with most of this software. It seems that our engine's exhaust porting, the duct (or chest), and header

design are not in agreement with the normal 2 stroke design fundamentals. That's a whole different

topic, though, and not subject to the intent of this thread.

We've run Blair, Jennings, and Bell, manually..... we have come up with a spreadsheet program that is

specific to these small 2 stroke nitro engines, but it needs tweaking a bit more through reverse engineering

and data collection.

Tim

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